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C1/DWH133/DH/SD/2.0/L02 22nd April 2016 FAO: Dave Hortin Environment Agency Lutra House Walton Summit Bamber Bridge Preston PR5 8BX Dear Dave, Your ref: NO/2016/108468/02-L01 LAND AT MITTON ROAD, WHALLEY – DISCHARGE OF CONDITIONS 7&8, APPLICATION NUMBER 3/2015/0637 Further to your correspondence dated 17th March, please find documents enclosed to complete information required in order for you to advise that discharging of the above drainage conditions is acceptable. The proposed surface water drainage network simulation outputs enclosed include the allowance for climate change in the outputs. This satisfies your first point. With regards to analysis of the existing culvert, existing drainage features have been added to the proposed surface water drainage model to provide an overall view of interaction between proposed and existing drainage in the simulations. This includes known land drainage connections and an allowance for run-off from the undeveloped area of the site that will continue to contribute to the culvert in the finished build. 2no. 150mm dia. pipes are evidenced to connect through the stone sided ditch upstream of the culvert. The contribution from these pipes has been included as pipe full flows and input as continual base flows (32 litres per second each). Similarly, the undeveloped portion of the site contributing to the culvert in the final build has been assumed to be an apportioned greenfield 100 year run-off rate based on 0.93 hectares (12.4 litres per second). The total existing allowance is therefore a very robust total of 76.4 litres per second and input as a continual base flow for all return periods. To accompany the above simulations, the model has been run against various culvert sedimentation blockage scenarios; 5%, 25% and 100% cross sectional loss, to assess the effect on the proposed development. Capacity in the existing culvert is such that even using robust base flows for existing contributions, there are no adverse effects for 5% or 25% sedimentation depth loss of capacity. The effects of culvert total blockage are significant, but the simulation model in this scenario does not take into account overland flood flow paths and the existing run-off contributions are inflated. Enclosed is an indicative flood flow path sketch indicating overland flood routes. Overland flow off site and into the adjacent River Calder is envisaged once flood levels reach 44.00m AOD when it will discharge from the site from the far south west corner. We trust this satisfies point 2 and provides further useful information on the capacity of the existing culvert. (cont’d)
EA Advisory Note Regarding Change to Flood Zone Extents It is acknowledged that the EA mapping has changed since the planning submission and subsequent consent for the site was granted. This, we have been advised, was a result of the July 2012 storm event and subsequent update of EA flood level data in the region at some point in time since. The level of mitigation provided during the planning approval process was to raise finished floor levels to a minimum level of 44.50m AOD as documented in RSK’s addendum letter relating to flood mitigation. Please see enclosed. The minimum floor level provided, set by the EA according to recent contact with Colin Whittingham of RSK, is indicated to be in the region of 1.37m above the 1 in 1000 year flood level of the adjacent River Calder based on data informing the FRA at that time. Assessment of this level of mitigation and the effects of more recent December 2015 storm events are being addressed proactively with the Flood Risk Management team and is viewed as a separate issue to the discharge of planning conditions. We are in the process of exchanging information with the Flood Management team to assist them in their ongoing assessment of the December 2015 storms and collation of evidence. At this point in time, no data is available from the EA regarding the December storm events other than an indication that it was likely to have been in the region of a 1 in 100 year storm event. Whilst it is noted that some development plots are now situated in Flood Zone 2, mitigation can be easily provided retrospectively by raising the minimum finished floor level of previous mitigation agreed and approved at planning stage. To aid this possible scenario, that requires EA data to be made available, we have advised the client that the plots now in Flood Zone could be phased in the build to enable alteration of levels should the previous level of mitigation be proven to be unsatisfactory. We view this issue as an ongoing separate consultation brought about by events occurring after planning and should not, therefore, delay discharging of the drainage related conditions. Should you have any queries or wish to discuss further, please do not hesitate to contact me. Yours sincerely,
Simon Downing Senior Infrastructure Engineer BETTS ASSOCIATES Encl. DWH133-101 rev P2 Drainage Layout Drawing (tender design) Microdrainage simulation outputs (tender design) DWH133 Indicative Overland Flood Routing for Culvert Total Blockage Scenario RSK letter 880213/CW/l02
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exg sewer
il 45.36 (150)
UU6508
exg sewer
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UU8501
exg sewer
il 47.55 (150)
UU5301
exg sewer
il 41.55 (675)
UU6301
exg sewer
il 41.65 (675)
UU5302
exg sewer
il 41.54 (600)
UU6402
exg sewer
il 42.51 assumed (450)
il 42.36 (600)
UU6302
exg sewer
il 41.71 (675)
UU6401
exg sewer
il 43.13 (450)
44.87
44.34
44.68
44.31
44.35
43.46
43.53
44.40
44.26
44.47
45.12
43.01
43.41
43.14
44.02
44.02
43.71
43.81
43.29
43.54
43.72
43.30
43.12
44.86
43.64
43.91
44.52
43.83
43.63
44.01
43.71
44.60
44.55
43.76
42.96
43.07
43.40
43.21
42.82
43.71
42.49
44.05
42.58
42.58
42.60
44.37
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STN2
STN3
STN4
STN5
STN6
93-102
V
V
V
V
V
V
V
V
CE1
CE2
CE3
CE2
CE1
CE1
CE1
CE1
CE1
CE1
CE1
93
94
95
96
97
98
99
100
101
102
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PP
A
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A
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3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
19
17
20
21
22
23
24
25
31
32
33
34
35
36
37
38
49
50
51
52
53
5455
56
57
58
59
60
61
62
63
64
65
73
74
75
76
77
78
80
81
82
83
84
85
86
87
88
89
90
91
92
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117118
119
120
121
122
123
124
125
126
130
131
132
133
134
135
136
A
S
111
79
79
110
A
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126
3
3
7
8
9
10
11
12
13
14
15
16
19
20
22
23
31
32
33
34
35
36
37
38
49
1
53
50
56
57
58
59
60
62
63
64
65
61
75
76
77
76
78
79
80
81
82
83
86
86
87
84
88
89
90
91
92
103
104
105
106
109
108
110
111
112
113
114
115
116
117
118
119
120
121
122
123
130
129
126
131
132
133
135
136
9
7
6
4
4
5
10
13
14
15
16
17
18
17
18
19
20
21
21
23
24
24
36
121
103
104
105
106
84
87
85
85
88
89
90
91
V
37
49
52
53
51
54
56
58
134
134
131
132
133
135
136
V
V
V
V
V
V
118
119
120
O
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A
S
A
S
A
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O
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P
A
S
O
P
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V
V
O
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V
V
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A
S
A
S
O
P
P
A
S
107
107
LEAP
5
V
CY7
CY7
CY7
CY15
CY7
CY7
CY10
CY8SP
CY16
CY16
CE5
CE5
CE6
CE5
CE5
CE4
CE4
V1
V2
V2
V2
V3
V3
V2
V2
V2
V1
V1
V3
CY3
CY7
CY12
CY12
CY6
CY6
CE8
CE9
CE4
CE4
CE11
CE13
CY10
CY10
CY7
CY7
CY7
CY7
CY1
CY3
CY4
CY10
CE11
CE15
CE11
CE4
CY10
CY10
CY4
CE9
CE9
CE7
CY12
CY12
CY10
CY10
CY7
CY7
CY4
CY7
CY6
CY2
CY14
CY2
CY2
CY13
CE9
CE7
CY3
CYG1
CYG1
CEG1
CEG2
CEG1
CEG1
CYG2
CEG1
CEG3
CEG5
CEG4
CEG4
CEG3
CEG4
CEG4
CEG3
CEG1
CEG5
CYG1
CYP1
CYP1
CYG1
CYG1
CYG1
CEG4
CEG4
CEG3
CEG4
CEG2
CYP2
CYP2
AS
O
P
P
O
P
P
A
S
CY11
O
P
P
CYG1
A
S CE4
CE4
O
P
P
CE4
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P
OPP
CY7
OPP
CY7
CY7
AS
CY7
CY7
O
P
P
A
S
A
S
CY2
O
P
P
CY2
A
S
O
P
P
28
28
CY12
CY12
29
29
A
S
CY12
26
27
28
29
30
27
O
P
P
CY2
O
P
P
CY7
A
S
O
P
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67
67
CY12
CY12
66
66
A
S
CY2
71
70
69
68
67
66
125
CYG1
O
P
P
CY7
O
P
P
CY7
CY7
A
S
127
128
127
128
129
A
S
CYP1
CYP1
CYP2
50
51
54
55
1
1
2
2
O
P
P
124
A
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CY8
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A
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CY12
CY12
O
P
P
O
P
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CY7
CY7
68
68
72
72
71
70
70
71
30
30
CYP1
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CYP1
V
72
27
92
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25
26
A
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C
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69
69
128
A
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127
73
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74
Turning Area
C
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2
6
114
81
82
116
24
24
25
57
119
119
121
121
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E
E
E
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39-48 & 137
39
40
41
42
43
44
45
46
47
48
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W
W
W
W
W
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CE1
CE1
CE2
CE3
CE1
CE2
CE1
CE1
CE1
CE1
39
40
41
42
43
44
45
46
47
48
137
CE1
Existing stone wall to be
retained. Openings to be
cut and made good. New
stone pillar to terminate
wall (see detail)
CEG3
CY16
W
W
CY16
CY16
W
W
W
W
76
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W
W
W
W
CY16
CY16
CY16
CY17
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GSL 45.450
GSL 45.300
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0
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3
2
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0
0
4
2
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0
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F18
F19
F20
F21
UU6301
F15
F16
F17
UU6401
HP
HP
HP
F5
2
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0
0
F12
F1
F2
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1
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0
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1.006
1
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0
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1.001
1
.
0
0
0
1
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0
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1
F4
F7
F8
F9
F13
F14
1
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0
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2
1
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0
0
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HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
F11
1
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0
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1
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3
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0
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1
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2
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2.002
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6.005
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4
4
.
0
0
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S1
S2
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S31
S32
S33
S35 (node)
S30
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
HP
F22
2
.
0
0
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1.008
1
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7
CHAINAGE
EXISTING GROUND LEVEL
ROAD1
47
.2
83
0.0
00
DATUM 38.000
40.000
45.000
50.000
4
4
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4
2
CL46.406
4
5
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6
1
5
0
m
m
@
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T
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C
L
A
Y
4
3
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2
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CL46.251
4
4
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6
7225m
m
@
1:150
T
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LA
Y
CL45.716
4
3
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5
1
3
7
5
m
m
@
1
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C
O
N
C
4
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CL44.944
4
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1
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3
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m
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@
1
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9
T
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p
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C
O
N
C
42.473
CL44.598
42.501
600m
m
@
1:393
Type C
O
N
C
CL43.704
4
2
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2
3
CL44.061
4
2
.
4
6
6
6
0
0
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m
@
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C
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CL44.213
4
2
.
4
4
2
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7
5
m
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@
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T
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CL44.023
4
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4
3
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m
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CL43.896
4
2
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6
CL43.470
3
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5
m
m
@
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C
CL45.665
4
4
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4
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4
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5
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CL44.810
4
3
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1
4
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4
5
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CL44.690
4
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1
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4
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CL44.957
4
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4
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4
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m
m
@
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:
3
9
9
T
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C
O
N
C
42.610
CL44.621
42.640
600mm @ 1:395
Type CONC
CL44.510
4
2
.
6
1
0
6
0
0
m
m
@
1
:
3
9
6
T
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C
4
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CL44.398
4
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@
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CL44.679
4
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4
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.
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1
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CL44.834
4
3
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3
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4
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4
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CL44.681
4
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m
m
@
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4
5
T
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C
O
N
C
42.910
CL44.687
42.991
300m
m
@
1:244
Type C
O
N
C
4
3
.
3
7
2
CL44.854
4
3
.
5
3
8
2
2
5
m
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CL46.272
4
4
.
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4
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CL46.353
4
4
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m
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@
1
:
1
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0
T
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C
L
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CL46.621
44.112
300mm @ 1:245
Type CONC
4
3
.
8
9
3
CL46.436
4
4
.
0
4
4
3
0
0
m
m
@
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4
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4
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1
8
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5
m
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4
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4
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.
4
1
5
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m
m
@
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C
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CL46.366
4
4
.
4
8
9
1
5
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m
@
1
:
1
3
5
T
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C
L
A
Y
CL46.581
43.870
150mm @ 1:150
Type CLAY
CL46.393
4
3
.
7
5
2
1
5
0
m
m
@
1
:
1
5
0
T
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CL46.103
4
3
.
5
6
7
1
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4
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CL45.736
1
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@
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T
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C
L
A
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CL46.184
4
4
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1
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0
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@
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C
L
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4
3
.
9
4
6
1
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CL45.145
4
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.
6
4
5
1
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@
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L
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CL44.808
4
3
.
4
5
4
1
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@
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C
L
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CL44.689
4
3
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2
1
5
0
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m
@
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6
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C
L
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CL44.849
4
3
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2
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1
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@
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CL44.757
4
2
.
9
0
7
1
5
0
m
m
@
1
:
1
5
0
T
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C
L
A
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42.438
CL44.664
42.529
150mm @ 1:150
Type CLAY
CL44.505
4
2
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3
8
1
5
0
m
m
@
1
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5
6
T
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p
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C
L
A
Y
42.020
CL44.085
42.295
CL44.611
150mm @ 1:147
Type CLAY
CL44.836
4
3
.
2
8
9
1
5
0
m
m
@
1
:
1
3
5
T
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C
L
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CL44.621
4
3
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7
1
5
0
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m
@
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T
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C
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CL44.670
4
3
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1
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CL44.858
4
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8
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4
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7
6
4
1
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m
@
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C
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CL44.641
4
2
.
6
3
6
1
5
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m
@
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C
L
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CL44.658
4
2
.
5
2
7
1
5
0
m
m
@
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1
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C
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CL46.135
4
4
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9
1
.
0
0
2
2
2
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m
m
@
1
:
4
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T
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C
L
A
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S34 (new headwall)
CL43.300
S36 (node)
CL43.550
S40 (node)
CL42.450
S41 (node)
CL42.652
S39 (node)
CL43.150
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CL43.200
S37 (node)
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DO NOT SCALE
TENDER
P2101DWH133
ADOPTABLE DRAINAGE LAYOUT
SECTION 104
WHALLEY
MITTON ROAD
Notes
1. Drainage design and construction is in accordance with Sewers for Adoption 6th
Edition and the requirements of the statutory undertaker.
2. Tolerances in pipe laying to be in accordance with Sewers for Adoption 6th
Edition clause 4.5.9
3. For pipes 150-450mm dia. all rocker pipes to be in accordance with Sewers for
Adoption 6th Edition.
4. Engineering bricks shall not contain frogs or holes.
5. Brickwork to manholes to be english bond.
6. Where pipes are surrounded in concrete, flexibility is to be maintained at pipe
joints by the use of a suitable compressible material eg. "flexcell" or
"fibreboard".
7. All manhole covers and frames must comply with BS EN124. Covers in roads to
be grade D400 and be 150mm deep. Manhole covers in car parking areas and
drives to be grade B125, whilst landscaped areas may be grade A15.
8. Clayware pipes to be 65 extra strength quality "hepseal" or similar approved.
9. Granolithic benching to manholes to be 40mm minimum thickness.
10. Precast concrete chamber rings to be reinforced.
11. The slope of benching in all cases should be 1 in 30.
12. Manholes shall not incorporate double square or double oblique channel
junctions in their inverts.
13. All incoming pipes shall be surrounded with 150mm of concrete to the face of
the collar of the first flexible joint and the outgoing pipe shall also be surrounded
to within 50mm of the first flexible joint and a compressible filler used as a
former between the concrete surround and downstream pipe collar.
14. All underground services to be confirmed by contractor prior to commencement
on site. Any discrepancies to be reported to engineer.
15. Private sewers not located in roads to be Class F granular bed and surround as
per standard details.
16. Sewers located under adopted roads to be Class S granular bed and surround
(more than 1.2m cover.)
17. Sewers located under private roads and car parking bays to be Class F
granular bed and surround as per standard details unless adopted, then provide
Class S (if more than 1.2m cover).
18. Private sewers with less than 0.6m of cover to be concrete surrounded as class
z on standard details.
19. Adopted sewers with less than 1.2m cover, provide class z concrete bed and
surround. Concrete haunching may be suitable for large diamater storage
sewers, guidance must be sought from adopting authority prior to use.
20. Road gullies to be trapped.
21. No deep or wide routed trees to be planted within close proximity of the
proposed and existing public sewer system.
22. All existing public sewer levels and indicative pipe/chamber locations have been
taken from sewer records. A drainage survey should be carried out to before a
site start to confirm pipe sizes, invert levels and pipe locations.
Proposed adoptable SW sewer and manhole
Proposed adoptable FW sewer and manhole
Proposed SW dragout chamber and lateral
Proposed FW dragout chamber and lateral
Proposed road gully and 150mmØ connection
Proposed public sewer easement
Existing public sewer easement
Existing combined public sewer
Development boundary
Arboricultural consultant's root protection areas
Legend
NOTE
The use of any other flow control device not associated with the Hydro International
Hydro-Brake Optimum reference SHE-0245-3320-1050-3320 may constitute a flood
risk. Should an alternative device be considered, the Betts Associates Engineer
shall be contacted to check if it is compatible with the design model and discharge
constraint. Betts Associates will not accept any liability from flooding caused by the
use of an alternative flow control product.
THE ADOPTABLE DRAINAGE WORKS ARE SUBJECT TO TECHNICAL
APPROVAL BY UNITED UTILITIES AND MAY THEREFORE CHANGE
SD1
FD1
P2 22.04.16 SD CLIENT COMMENTS INCORPORATED, AMENDED RATO SUIT SITE LAYOUT REV F AND INCLUSION OFEXISTING CULVERT FOR EA APPROVAL PURPOSES
P1 08.02.16 SD FIRST ISSUE RA
FLOW CONTROL CHAMBER MH S31
Hydro International HydroBrake Optimum
SHE-0245-3320-1050-3320
Design head = 1.05m
Restricted discharge max. = 33.2 l/sec
DETENTION BASIN
No infiltration - lined with clay or
impermeable membrane
Bed level = 41.723 to 42.323m
Permanent water level = 42.473m
Top water level (100yr+30%) = 43.508m
Top of bank level = 43.808
Freeboard depth = 0.30m
Side slopes = 1:5
Earthworks batters = 1:3
OUTFALL TO EXISTING STONE WALLED
DITCH
Proposed 375mm outlet pipe to discharge to existing ditch via
new headwall
POND INLET
Adoptable headwall with pipe safety grille
POND OUTLET
Headwall with pipe safety grille
WORKS TO EXISTING PUBLIC
SEWER MANHOLE UU6508
Cover to be raised to proposed finished road level
WORKS TO EXISTING PUBLIC
SEWER MANHOLE UU6401
Cover to be raised to proposed finished road level
and chamber modified with proposed incoming
150mm connection
WORKS TO EXISTING PUBLIC
SEWER MANHOLE UU6301
Chamber to be modified with proposed incoming
150mm connection
SEWER CROSSING
Levels of existing sewer to be
checked on site before site
start and Betts Associates
Engineer notified immediately
DWH133 – Development off Mitton Road, Whalley
Surface Water Drainage Network Details and
Simulation Outputs (including existing culvert)
April 2016
Betts Associates Ltd Page 0Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Design Criteria for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Pipe Sizes SW N1 MD OUT REV C Manhole Sizes SW N1 MD OUT REV C
FSR Rainfall Model - England and WalesReturn Period (years) 2 Add Flow / Climate Change (%) 0
M5-60 (mm) 19.200 Minimum Backdrop Height (m) 0.000Ratio R 0.295 Maximum Backdrop Height (m) 0.000
Maximum Rainfall (mm/hr) 50 Min Design Depth for Optimisation (m) 1.200Maximum Time of Concentration (mins) 30 Min Vel for Auto Design only (m/s) 1.00
Foul Sewage (l/s/ha) 0.000 Min Slope for Optimisation (1:X) 400Volumetric Runoff Coeff. 0.750
Designed with Level Soffits
Network Design Table for SW N1 PDS OUT REV C.SWS
« - Indicates pipe capacity < flow
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.000 51.353 0.514 100.0 0.050 5.00 0.0 0.600 o 150S1.001 14.751 0.098 150.0 0.112 0.00 0.0 0.600 o 225S1.002 17.206 0.401 42.9 0.025 0.00 0.0 0.600 o 225
S2.000 30.887 0.182 169.7 0.064 5.00 0.0 0.600 o 225S2.001 59.656 0.351 170.0 0.165 0.00 0.0 0.600 o 225S2.002 16.642 0.068 244.7 0.179 0.00 0.0 0.600 o 300S2.003 36.923 0.151 244.5 0.025 0.00 0.0 0.600 o 300
S1.003 16.285 0.067 243.1 0.105 0.00 0.0 0.600 o 375S1.004 53.260 0.556 95.8 0.025 0.00 0.0 0.600 o 375
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.000 50.00 5.85 45.056 0.050 0.0 0.0 0.0 1.00 17.8 6.8S1.001 50.00 6.08 44.467 0.162 0.0 0.0 0.0 1.07 42.4 21.9S1.002 50.00 6.23 44.369 0.187 0.0 0.0 0.0 2.00 79.6 25.3
S2.000 50.00 5.51 44.720 0.064 0.0 0.0 0.0 1.00 39.8 8.7S2.001 50.00 6.51 44.538 0.229 0.0 0.0 0.0 1.00 39.8 31.0S2.002 50.00 6.79 44.112 0.408 0.0 0.0 0.0 1.00 70.7 55.2S2.003 49.08 7.40 44.044 0.433 0.0 0.0 0.0 1.00 70.8 57.6
S1.003 48.41 7.64 43.818 0.725 0.0 0.0 0.0 1.16 127.9 95.1S1.004 47.10 8.11 43.751 0.750 0.0 0.0 0.0 1.85 204.5 95.7
Betts Associates Ltd Page 1Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.005 32.531 0.473 68.8 0.025 0.00 0.0 0.600 o 375
S3.000 44.740 0.558 80.2 0.156 5.00 0.0 0.600 o 225S3.001 23.497 0.310 75.8 0.035 0.00 0.0 0.600 o 225
S4.000 28.283 0.166 170.4 0.114 5.00 0.0 0.600 o 225
S3.002 9.228 0.023 401.2 0.047 0.00 0.0 0.600 o 450S3.003 31.828 0.079 402.9 0.050 0.00 0.0 0.600 o 450
S5.000 24.668 0.145 170.1 0.214 5.00 0.0 0.600 o 225
S3.004 49.688 0.118 421.1 0.025 0.00 0.0 0.600 o 450S3.005 56.326 0.141 399.5 0.171 0.00 0.0 0.600 o 450S3.006 11.861 0.030 395.4 0.172 0.00 0.0 0.600 o 600
S6.000 17.226 0.101 170.6 0.025 5.00 0.0 0.600 o 225S6.001 20.616 0.121 170.4 0.025 0.00 0.0 0.600 o 225S6.002 14.998 0.088 170.4 0.067 0.00 0.0 0.600 o 225S6.003 18.820 0.111 169.5 0.025 0.00 0.0 0.600 o 225S6.004 30.619 0.125 245.0 0.100 0.00 0.0 0.600 o 300S6.005 19.803 0.081 244.5 0.025 0.00 0.0 0.600 o 300
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.005 46.45 8.36 43.195 0.775 0.0 0.0 0.0 2.19 241.6 97.5
S3.000 50.00 5.51 44.240 0.156 0.0 0.0 0.0 1.46 58.1 21.1S3.001 50.00 5.77 43.682 0.191 0.0 0.0 0.0 1.50 59.8 25.9
S4.000 50.00 5.47 43.538 0.114 0.0 0.0 0.0 1.00 39.7 15.4
S3.002 50.00 5.92 43.147 0.352 0.0 0.0 0.0 1.01 160.4 47.7S3.003 50.00 6.45 43.124 0.402 0.0 0.0 0.0 1.01 160.1 54.4
S5.000 50.00 5.41 43.415 0.214 0.0 0.0 0.0 1.00 39.7 29.0
S3.004 49.41 7.29 43.045 0.641 0.0 0.0 0.0 0.98 156.6 85.8S3.005 46.82 8.22 42.927 0.812 0.0 0.0 0.0 1.01 160.8 103.0S3.006 46.40 8.38 42.636 0.984 0.0 0.0 0.0 1.22 344.5 123.7
S6.000 50.00 5.29 43.612 0.025 0.0 0.0 0.0 1.00 39.7 3.4S6.001 50.00 5.63 43.511 0.050 0.0 0.0 0.0 1.00 39.7 6.8S6.002 50.00 5.88 43.390 0.117 0.0 0.0 0.0 1.00 39.7 15.8S6.003 50.00 6.20 43.302 0.142 0.0 0.0 0.0 1.00 39.8 19.2S6.004 50.00 6.71 43.116 0.242 0.0 0.0 0.0 1.00 70.7 32.8S6.005 50.00 7.04 42.991 0.267 0.0 0.0 0.0 1.00 70.8 36.2
Betts Associates Ltd Page 2Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S3.007 14.635 0.037 395.5 0.025 0.00 0.0 0.600 o 600S3.008 28.820 0.072 400.3 0.025 0.00 0.0 0.600 o 600
S1.006 11.015 0.028 393.4 0.093 0.00 0.0 0.600 o 600S1.007 55.720 0.005 11144.0 0.000 0.00 0.0 0.600 o 750S1.008 9.667 0.024 402.8 0.025 0.00 0.0 0.600 o 600S1.009 19.905 0.066 300.0 0.025 0.00 0.0 0.600 o 375S1.010 29.494 0.098 301.0 0.000 0.00 0.0 0.600 o 375S1.011 12.510 0.042 300.0 0.000 0.00 0.0 0.600 o 375S1.012 6.031 0.025 241.2 0.000 0.00 0.0 0.032 |_| -1S1.013 4.585 0.019 241.3 0.000 0.00 76.4 0.032 |_| -1S1.014 73.636 0.580 127.0 0.000 0.00 0.0 0.600 o 600
S7.000 9.803 0.010 980.3 0.000 5.00 0.0 0.032 |_| -2S7.001 9.717 0.070 138.8 0.000 0.00 0.0 0.032 |_| -2S7.002 10.837 0.060 180.6 0.000 0.00 0.0 0.032 |_| -2
S1.015 5.117 0.012 426.4 0.000 0.00 0.0 0.032 |_| -2
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S3.007 45.90 8.58 42.606 1.276 0.0 0.0 0.0 1.22 344.5 158.6S3.008 44.94 8.98 42.569 1.301 0.0 0.0 0.0 1.21 342.4 158.6
S1.006 44.59 9.13 42.497 2.169 0.0 0.0 0.0 1.22 345.4 261.9S1.007 37.76 12.77 42.469 2.169 0.0 0.0 0.0 0.26 112.7« 261.9S1.008 37.56 12.90 42.464 2.194 0.0 0.0 0.0 1.21 341.3 261.9S1.009 37.10 13.22 42.440 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.010 36.44 13.69 42.374 2.219 0.0 0.0 0.0 1.04 114.8« 261.9S1.011 36.17 13.89 42.276 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.012 36.03 14.00 42.234 2.219 0.0 0.0 0.0 0.95 981.2 261.9S1.013 35.92 14.08 42.209 2.219 76.4 0.0 0.0 0.95 981.0 292.3S1.014 35.19 14.65 42.190 2.219 76.4 0.0 0.0 2.16 610.7 292.3
S7.000 50.00 5.28 41.720 0.000 0.0 0.0 0.0 0.58 1086.2 0.0S7.001 50.00 5.39 41.710 0.000 0.0 0.0 0.0 1.54 2886.6 0.0S7.002 50.00 5.52 41.640 0.000 0.0 0.0 0.0 1.35 2530.6 0.0
S1.015 35.07 14.75 41.580 2.219 76.4 0.0 0.0 0.88 1647.0 292.3
Betts Associates Ltd Page 3Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Manhole Schedules for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
MHName
MHCL (m)
MHDepth(m)
MHConnection
MHDiam.,L*W
(mm)PN
Pipe OutInvert
Level (m)Diameter(mm)
PNPipes InInvert
Level (m)Diameter(mm)
Backdrop(mm)
S1 46.406 1.350 Open Manhole 1350 S1.000 45.056 150
S2 46.251 1.784 Open Manhole 1200 S1.001 44.467 225 S1.000 44.542 150
S3 46.135 1.766 Open Manhole 1200 S1.002 44.369 225 S1.001 44.369 225
S4 46.272 1.552 Open Manhole 1500 S2.000 44.720 225
S5 46.353 1.815 Open Manhole 1200 S2.001 44.538 225 S2.000 44.538 225
S6 46.621 2.509 Open Manhole 1350 S2.002 44.112 300 S2.001 44.187 225
S7 46.436 2.392 Open Manhole 1350 S2.003 44.044 300 S2.002 44.044 300
S8 46.038 2.220 Open Manhole 1350 S1.003 43.818 375 S1.002 43.968 225
S2.003 43.893 300
S9 45.811 2.060 Open Manhole 1350 S1.004 43.751 375 S1.003 43.751 375
S10 44.944 1.749 Open Manhole 1350 S1.005 43.195 375 S1.004 43.195 375
S11 45.714 1.474 Open Manhole 1350 S3.000 44.240 225
S12 45.107 1.425 Open Manhole 1350 S3.001 43.682 225 S3.000 43.682 225
S13 44.914 1.376 Open Manhole 1350 S4.000 43.538 225
S14 44.811 1.664 Open Manhole 1800 S3.002 43.147 450 S3.001 43.372 225
S4.000 43.372 225
S15 44.690 1.566 Open Manhole 1800 S3.003 43.124 450 S3.002 43.124 450
S16 44.954 1.539 Open Manhole 1350 S5.000 43.415 225
S17 44.957 1.912 Open Manhole 1800 S3.004 43.045 450 S3.003 43.045 450
S5.000 43.270 225
S18 44.770 1.843 Open Manhole 1800 S3.005 42.927 450 S3.004 42.927 450
S19 44.621 1.985 Open Manhole 2100 S3.006 42.636 600 S3.005 42.786 450
S20 44.679 1.067 Open Manhole 1350 S6.000 43.612 225
S21 44.863 1.352 Open Manhole 1350 S6.001 43.511 225 S6.000 43.511 225
S22 44.834 1.444 Open Manhole 1350 S6.002 43.390 225 S6.001 43.390 225
S23 44.712 1.410 Open Manhole 1350 S6.003 43.302 225 S6.002 43.302 225
S24 44.681 1.565 Open Manhole 1350 S6.004 43.116 300 S6.003 43.191 225
S25 44.687 1.696 Open Manhole 1350 S6.005 42.991 300 S6.004 42.991 300
S26 44.510 1.904 Open Manhole 2100 S3.007 42.606 600 S3.006 42.606 600
S6.005 42.910 300 4
S27 44.398 1.829 Open Manhole 2100 S3.008 42.569 600 S3.007 42.569 600
S28 44.598 2.101 Open Manhole 2100 S1.006 42.497 600 S1.005 42.722 375
S3.008 42.497 600
S29 43.787 1.318 Open Manhole 2100 S1.007 42.469 750 S1.006 42.469 600
S30 43.787 1.323 Open Manhole 2100 S1.008 42.464 600 S1.007 42.464 750
S31 44.213 1.773 Open Manhole 2400 S1.009 42.440 375 S1.008 42.440 600
S32 44.023 1.649 Open Manhole 1350 S1.010 42.374 375 S1.009 42.374 375
S33 43.896 1.620 Open Manhole 1350 S1.011 42.276 375 S1.010 42.276 375
Betts Associates Ltd Page 4Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Manhole Schedules for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
MHName
MHCL (m)
MHDepth(m)
MHConnection
MHDiam.,L*W
(mm)PN
Pipe OutInvert
Level (m)Diameter(mm)
PNPipes InInvert
Level (m)Diameter(mm)
Backdrop(mm)
S34 43.300 1.066 Open Manhole 900 x 900 S1.012 42.234 -1 S1.011 42.234 375
S35 43.470 1.261 Open Manhole 900 x 900 S1.013 42.209 -1 S1.012 42.209 -1
S36 43.550 1.360 Open Manhole 900 x 900 S1.014 42.190 600 S1.013 42.190 -1
S37 44.100 2.380 Open Manhole 2975 x 2795 S7.000 41.720 -2
S38 43.200 1.490 Open Manhole 2975 x 2975 S7.001 41.710 -2 S7.000 41.710 -2
S39 43.150 1.510 Open Manhole 2975 x 2975 S7.002 41.640 -2 S7.001 41.640 -2
S40 42.450 0.870 Open Manhole 2975 x 2975 S1.015 41.580 -2 S1.014 41.610 600
S7.002 41.580 -2
S41 42.500 0.932 Open Manhole 2975 x 2975 OUTFALL S1.015 41.568 -2
Betts Associates Ltd Page 5Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
PIPELINE SCHEDULES for SW N1 PDS OUT REV C.SWS
Upstream Manhole
©1982-2014 XP Solutions
PN HydSect
Diam(mm)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S1.000 o 150 S1 46.406 45.056 1.200 Open Manhole 1350S1.001 o 225 S2 46.251 44.467 1.559 Open Manhole 1200S1.002 o 225 S3 46.135 44.369 1.541 Open Manhole 1200
S2.000 o 225 S4 46.272 44.720 1.327 Open Manhole 1500S2.001 o 225 S5 46.353 44.538 1.590 Open Manhole 1200S2.002 o 300 S6 46.621 44.112 2.209 Open Manhole 1350S2.003 o 300 S7 46.436 44.044 2.092 Open Manhole 1350
S1.003 o 375 S8 46.038 43.818 1.845 Open Manhole 1350S1.004 o 375 S9 45.811 43.751 1.685 Open Manhole 1350S1.005 o 375 S10 44.944 43.195 1.374 Open Manhole 1350
S3.000 o 225 S11 45.714 44.240 1.249 Open Manhole 1350S3.001 o 225 S12 45.107 43.682 1.200 Open Manhole 1350
S4.000 o 225 S13 44.914 43.538 1.151 Open Manhole 1350
S3.002 o 450 S14 44.811 43.147 1.214 Open Manhole 1800S3.003 o 450 S15 44.690 43.124 1.116 Open Manhole 1800
Downstream Manhole
PN Length(m)
Slope(1:X)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S1.000 51.353 100.0 S2 46.251 44.542 1.559 Open Manhole 1200S1.001 14.751 150.0 S3 46.135 44.369 1.541 Open Manhole 1200S1.002 17.206 42.9 S8 46.038 43.968 1.845 Open Manhole 1350
S2.000 30.887 169.7 S5 46.353 44.538 1.590 Open Manhole 1200S2.001 59.656 170.0 S6 46.621 44.187 2.209 Open Manhole 1350S2.002 16.642 244.7 S7 46.436 44.044 2.092 Open Manhole 1350S2.003 36.923 244.5 S8 46.038 43.893 1.845 Open Manhole 1350
S1.003 16.285 243.1 S9 45.811 43.751 1.685 Open Manhole 1350S1.004 53.260 95.8 S10 44.944 43.195 1.374 Open Manhole 1350S1.005 32.531 68.8 S28 44.598 42.722 1.501 Open Manhole 2100
S3.000 44.740 80.2 S12 45.107 43.682 1.200 Open Manhole 1350S3.001 23.497 75.8 S14 44.811 43.372 1.214 Open Manhole 1800
S4.000 28.283 170.4 S14 44.811 43.372 1.214 Open Manhole 1800
S3.002 9.228 401.2 S15 44.690 43.124 1.116 Open Manhole 1800S3.003 31.828 402.9 S17 44.957 43.045 1.462 Open Manhole 1800
Betts Associates Ltd Page 6Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
PIPELINE SCHEDULES for SW N1 PDS OUT REV C.SWS
Upstream Manhole
©1982-2014 XP Solutions
PN HydSect
Diam(mm)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S5.000 o 225 S16 44.954 43.415 1.314 Open Manhole 1350
S3.004 o 450 S17 44.957 43.045 1.462 Open Manhole 1800S3.005 o 450 S18 44.770 42.927 1.393 Open Manhole 1800S3.006 o 600 S19 44.621 42.636 1.385 Open Manhole 2100
S6.000 o 225 S20 44.679 43.612 0.842 Open Manhole 1350S6.001 o 225 S21 44.863 43.511 1.127 Open Manhole 1350S6.002 o 225 S22 44.834 43.390 1.219 Open Manhole 1350S6.003 o 225 S23 44.712 43.302 1.185 Open Manhole 1350S6.004 o 300 S24 44.681 43.116 1.265 Open Manhole 1350S6.005 o 300 S25 44.687 42.991 1.396 Open Manhole 1350
S3.007 o 600 S26 44.510 42.606 1.304 Open Manhole 2100S3.008 o 600 S27 44.398 42.569 1.229 Open Manhole 2100
S1.006 o 600 S28 44.598 42.497 1.501 Open Manhole 2100S1.007 o 750 S29 43.787 42.469 0.568 Open Manhole 2100S1.008 o 600 S30 43.787 42.464 0.723 Open Manhole 2100S1.009 o 375 S31 44.213 42.440 1.398 Open Manhole 2400S1.010 o 375 S32 44.023 42.374 1.274 Open Manhole 1350
Downstream Manhole
PN Length(m)
Slope(1:X)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S5.000 24.668 170.1 S17 44.957 43.270 1.462 Open Manhole 1800
S3.004 49.688 421.1 S18 44.770 42.927 1.393 Open Manhole 1800S3.005 56.326 399.5 S19 44.621 42.786 1.385 Open Manhole 2100S3.006 11.861 395.4 S26 44.510 42.606 1.304 Open Manhole 2100
S6.000 17.226 170.6 S21 44.863 43.511 1.127 Open Manhole 1350S6.001 20.616 170.4 S22 44.834 43.390 1.219 Open Manhole 1350S6.002 14.998 170.4 S23 44.712 43.302 1.185 Open Manhole 1350S6.003 18.820 169.5 S24 44.681 43.191 1.265 Open Manhole 1350S6.004 30.619 245.0 S25 44.687 42.991 1.396 Open Manhole 1350S6.005 19.803 244.5 S26 44.510 42.910 1.300 Open Manhole 2100
S3.007 14.635 395.5 S27 44.398 42.569 1.229 Open Manhole 2100S3.008 28.820 400.3 S28 44.598 42.497 1.501 Open Manhole 2100
S1.006 11.015 393.4 S29 43.787 42.469 0.718 Open Manhole 2100S1.007 55.720 11144.0 S30 43.787 42.464 0.573 Open Manhole 2100S1.008 9.667 402.8 S31 44.213 42.440 1.173 Open Manhole 2400S1.009 19.905 300.0 S32 44.023 42.374 1.274 Open Manhole 1350S1.010 29.494 301.0 S33 43.896 42.276 1.245 Open Manhole 1350
Betts Associates Ltd Page 7Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
PIPELINE SCHEDULES for SW N1 PDS OUT REV C.SWS
Upstream Manhole
©1982-2014 XP Solutions
PN HydSect
Diam(mm)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S1.011 o 375 S33 43.896 42.276 1.245 Open Manhole 1350S1.012 |_| -1 S34 43.300 42.234 -0.084 Open Manhole 900 x 900S1.013 |_| -1 S35 43.470 42.209 0.111 Open Manhole 900 x 900S1.014 o 600 S36 43.550 42.190 0.760 Open Manhole 900 x 900
S7.000 |_| -2 S37 44.100 41.720 1.750 Open Manhole 2975 x 2795S7.001 |_| -2 S38 43.200 41.710 0.860 Open Manhole 2975 x 2975S7.002 |_| -2 S39 43.150 41.640 0.880 Open Manhole 2975 x 2975
S1.015 |_| -2 S40 42.450 41.580 0.240 Open Manhole 2975 x 2975
Downstream Manhole
PN Length(m)
Slope(1:X)
MHName
C.Level(m)
I.Level(m)
D.Depth(m)
MHConnection
MH DIAM., L*W(mm)
S1.011 12.510 300.0 S34 43.300 42.234 0.691 Open Manhole 900 x 900S1.012 6.031 241.2 S35 43.470 42.209 0.111 Open Manhole 900 x 900S1.013 4.585 241.3 S36 43.550 42.190 0.210 Open Manhole 900 x 900S1.014 73.636 127.0 S40 42.450 41.610 0.240 Open Manhole 2975 x 2975
S7.000 9.803 980.3 S38 43.200 41.710 0.860 Open Manhole 2975 x 2975S7.001 9.717 138.8 S39 43.150 41.640 0.880 Open Manhole 2975 x 2975S7.002 10.837 180.6 S40 42.450 41.580 0.240 Open Manhole 2975 x 2975
S1.015 5.117 426.4 S41 42.500 41.568 0.302 Open Manhole 2975 x 2975
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
OutfallPipe Number
OutfallName
C. Level(m)
I. Level(m)
MinI. Level
(m)
D,L(mm)
W(mm)
S1.015 S41 42.500 41.568 42.190 2975 2975
Datum (m) 0.000 Offset (mins) 0
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
1 0.000 7 0.000 13 0.000 19 0.000 25 0.000 31 0.0002 0.000 8 0.000 14 0.000 20 0.000 26 0.000 32 0.0003 0.000 9 0.000 15 0.000 21 0.000 27 0.000 33 0.0004 0.000 10 0.000 16 0.000 22 0.000 28 0.000 34 0.0005 0.000 11 0.000 17 0.000 23 0.000 29 0.000 35 0.0006 0.000 12 0.000 18 0.000 24 0.000 30 0.000 36 0.000
Betts Associates Ltd Page 8Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
37 0.000 87 0.000 137 0.000 187 0.000 237 0.000 287 0.00038 0.000 88 0.000 138 0.000 188 0.000 238 0.000 288 0.00039 0.000 89 0.000 139 0.000 189 0.000 239 0.000 289 0.00040 0.000 90 0.000 140 0.000 190 0.000 240 0.000 290 0.00041 0.000 91 0.000 141 0.000 191 0.000 241 0.000 291 0.00042 0.000 92 0.000 142 0.000 192 0.000 242 0.000 292 0.00043 0.000 93 0.000 143 0.000 193 0.000 243 0.000 293 0.00044 0.000 94 0.000 144 0.000 194 0.000 244 0.000 294 0.00045 0.000 95 0.000 145 0.000 195 0.000 245 0.000 295 0.00046 0.000 96 0.000 146 0.000 196 0.000 246 0.000 296 0.00047 0.000 97 0.000 147 0.000 197 0.000 247 0.000 297 0.00048 0.000 98 0.000 148 0.000 198 0.000 248 0.000 298 0.00049 0.000 99 0.000 149 0.000 199 0.000 249 0.000 299 0.00050 0.000 100 0.000 150 0.000 200 0.000 250 0.000 300 0.00051 0.000 101 0.000 151 0.000 201 0.000 251 0.000 301 0.00052 0.000 102 0.000 152 0.000 202 0.000 252 0.000 302 0.00053 0.000 103 0.000 153 0.000 203 0.000 253 0.000 303 0.00054 0.000 104 0.000 154 0.000 204 0.000 254 0.000 304 0.00055 0.000 105 0.000 155 0.000 205 0.000 255 0.000 305 0.00056 0.000 106 0.000 156 0.000 206 0.000 256 0.000 306 0.00057 0.000 107 0.000 157 0.000 207 0.000 257 0.000 307 0.00058 0.000 108 0.000 158 0.000 208 0.000 258 0.000 308 0.00059 0.000 109 0.000 159 0.000 209 0.000 259 0.000 309 0.00060 0.000 110 0.000 160 0.000 210 0.000 260 0.000 310 0.00061 0.000 111 0.000 161 0.000 211 0.000 261 0.000 311 0.00062 0.000 112 0.000 162 0.000 212 0.000 262 0.000 312 0.00063 0.000 113 0.000 163 0.000 213 0.000 263 0.000 313 0.00064 0.000 114 0.000 164 0.000 214 0.000 264 0.000 314 0.00065 0.000 115 0.000 165 0.000 215 0.000 265 0.000 315 0.00066 0.000 116 0.000 166 0.000 216 0.000 266 0.000 316 0.00067 0.000 117 0.000 167 0.000 217 0.000 267 0.000 317 0.00068 0.000 118 0.000 168 0.000 218 0.000 268 0.000 318 0.00069 0.000 119 0.000 169 0.000 219 0.000 269 0.000 319 0.00070 0.000 120 0.000 170 0.000 220 0.000 270 0.000 320 0.00071 0.000 121 0.000 171 0.000 221 0.000 271 0.000 321 0.00072 0.000 122 0.000 172 0.000 222 0.000 272 0.000 322 0.00073 0.000 123 0.000 173 0.000 223 0.000 273 0.000 323 0.00074 0.000 124 0.000 174 0.000 224 0.000 274 0.000 324 0.00075 0.000 125 0.000 175 0.000 225 0.000 275 0.000 325 0.00076 0.000 126 0.000 176 0.000 226 0.000 276 0.000 326 0.00077 0.000 127 0.000 177 0.000 227 0.000 277 0.000 327 0.00078 0.000 128 0.000 178 0.000 228 0.000 278 0.000 328 0.00079 0.000 129 0.000 179 0.000 229 0.000 279 0.000 329 0.00080 0.000 130 0.000 180 0.000 230 0.000 280 0.000 330 0.00081 0.000 131 0.000 181 0.000 231 0.000 281 0.000 331 0.00082 0.000 132 0.000 182 0.000 232 0.000 282 0.000 332 0.00083 0.000 133 0.000 183 0.000 233 0.000 283 0.000 333 0.00084 0.000 134 0.000 184 0.000 234 0.000 284 0.000 334 0.00085 0.000 135 0.000 185 0.000 235 0.000 285 0.000 335 0.00086 0.000 136 0.000 186 0.000 236 0.000 286 0.000 336 0.000
Betts Associates Ltd Page 9Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
337 0.000 387 0.000 437 0.000 487 0.000 537 0.000 587 0.000338 0.000 388 0.000 438 0.000 488 0.000 538 0.000 588 0.000339 0.000 389 0.000 439 0.000 489 0.000 539 0.000 589 0.000340 0.000 390 0.000 440 0.000 490 0.000 540 0.000 590 0.000341 0.000 391 0.000 441 0.000 491 0.000 541 0.000 591 0.000342 0.000 392 0.000 442 0.000 492 0.000 542 0.000 592 0.000343 0.000 393 0.000 443 0.000 493 0.000 543 0.000 593 0.000344 0.000 394 0.000 444 0.000 494 0.000 544 0.000 594 0.000345 0.000 395 0.000 445 0.000 495 0.000 545 0.000 595 0.000346 0.000 396 0.000 446 0.000 496 0.000 546 0.000 596 0.000347 0.000 397 0.000 447 0.000 497 0.000 547 0.000 597 0.000348 0.000 398 0.000 448 0.000 498 0.000 548 0.000 598 0.000349 0.000 399 0.000 449 0.000 499 0.000 549 0.000 599 0.000350 0.000 400 0.000 450 0.000 500 0.000 550 0.000 600 0.000351 0.000 401 0.000 451 0.000 501 0.000 551 0.000 601 0.000352 0.000 402 0.000 452 0.000 502 0.000 552 0.000 602 0.000353 0.000 403 0.000 453 0.000 503 0.000 553 0.000 603 0.000354 0.000 404 0.000 454 0.000 504 0.000 554 0.000 604 0.000355 0.000 405 0.000 455 0.000 505 0.000 555 0.000 605 0.000356 0.000 406 0.000 456 0.000 506 0.000 556 0.000 606 0.000357 0.000 407 0.000 457 0.000 507 0.000 557 0.000 607 0.000358 0.000 408 0.000 458 0.000 508 0.000 558 0.000 608 0.000359 0.000 409 0.000 459 0.000 509 0.000 559 0.000 609 0.000360 0.000 410 0.000 460 0.000 510 0.000 560 0.000 610 0.000361 0.000 411 0.000 461 0.000 511 0.000 561 0.000 611 0.000362 0.000 412 0.000 462 0.000 512 0.000 562 0.000 612 0.000363 0.000 413 0.000 463 0.000 513 0.000 563 0.000 613 0.000364 0.000 414 0.000 464 0.000 514 0.000 564 0.000 614 0.000365 0.000 415 0.000 465 0.000 515 0.000 565 0.000 615 0.000366 0.000 416 0.000 466 0.000 516 0.000 566 0.000 616 0.000367 0.000 417 0.000 467 0.000 517 0.000 567 0.000 617 0.000368 0.000 418 0.000 468 0.000 518 0.000 568 0.000 618 0.000369 0.000 419 0.000 469 0.000 519 0.000 569 0.000 619 0.000370 0.000 420 0.000 470 0.000 520 0.000 570 0.000 620 0.000371 0.000 421 0.000 471 0.000 521 0.000 571 0.000 621 0.000372 0.000 422 0.000 472 0.000 522 0.000 572 0.000 622 0.000373 0.000 423 0.000 473 0.000 523 0.000 573 0.000 623 0.000374 0.000 424 0.000 474 0.000 524 0.000 574 0.000 624 0.000375 0.000 425 0.000 475 0.000 525 0.000 575 0.000 625 0.000376 0.000 426 0.000 476 0.000 526 0.000 576 0.000 626 0.000377 0.000 427 0.000 477 0.000 527 0.000 577 0.000 627 0.000378 0.000 428 0.000 478 0.000 528 0.000 578 0.000 628 0.000379 0.000 429 0.000 479 0.000 529 0.000 579 0.000 629 0.000380 0.000 430 0.000 480 0.000 530 0.000 580 0.000 630 0.000381 0.000 431 0.000 481 0.000 531 0.000 581 0.000 631 0.000382 0.000 432 0.000 482 0.000 532 0.000 582 0.000 632 0.000383 0.000 433 0.000 483 0.000 533 0.000 583 0.000 633 0.000384 0.000 434 0.000 484 0.000 534 0.000 584 0.000 634 0.000385 0.000 435 0.000 485 0.000 535 0.000 585 0.000 635 0.000386 0.000 436 0.000 486 0.000 536 0.000 586 0.000 636 0.000
Betts Associates Ltd Page 10Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
637 0.000 687 0.000 737 0.000 787 0.000 837 0.000 887 0.000638 0.000 688 0.000 738 0.000 788 0.000 838 0.000 888 0.000639 0.000 689 0.000 739 0.000 789 0.000 839 0.000 889 0.000640 0.000 690 0.000 740 0.000 790 0.000 840 0.000 890 0.000641 0.000 691 0.000 741 0.000 791 0.000 841 0.000 891 0.000642 0.000 692 0.000 742 0.000 792 0.000 842 0.000 892 0.000643 0.000 693 0.000 743 0.000 793 0.000 843 0.000 893 0.000644 0.000 694 0.000 744 0.000 794 0.000 844 0.000 894 0.000645 0.000 695 0.000 745 0.000 795 0.000 845 0.000 895 0.000646 0.000 696 0.000 746 0.000 796 0.000 846 0.000 896 0.000647 0.000 697 0.000 747 0.000 797 0.000 847 0.000 897 0.000648 0.000 698 0.000 748 0.000 798 0.000 848 0.000 898 0.000649 0.000 699 0.000 749 0.000 799 0.000 849 0.000 899 0.000650 0.000 700 0.000 750 0.000 800 0.000 850 0.000 900 0.000651 0.000 701 0.000 751 0.000 801 0.000 851 0.000 901 0.000652 0.000 702 0.000 752 0.000 802 0.000 852 0.000 902 0.000653 0.000 703 0.000 753 0.000 803 0.000 853 0.000 903 0.000654 0.000 704 0.000 754 0.000 804 0.000 854 0.000 904 0.000655 0.000 705 0.000 755 0.000 805 0.000 855 0.000 905 0.000656 0.000 706 0.000 756 0.000 806 0.000 856 0.000 906 0.000657 0.000 707 0.000 757 0.000 807 0.000 857 0.000 907 0.000658 0.000 708 0.000 758 0.000 808 0.000 858 0.000 908 0.000659 0.000 709 0.000 759 0.000 809 0.000 859 0.000 909 0.000660 0.000 710 0.000 760 0.000 810 0.000 860 0.000 910 0.000661 0.000 711 0.000 761 0.000 811 0.000 861 0.000 911 0.000662 0.000 712 0.000 762 0.000 812 0.000 862 0.000 912 0.000663 0.000 713 0.000 763 0.000 813 0.000 863 0.000 913 0.000664 0.000 714 0.000 764 0.000 814 0.000 864 0.000 914 0.000665 0.000 715 0.000 765 0.000 815 0.000 865 0.000 915 0.000666 0.000 716 0.000 766 0.000 816 0.000 866 0.000 916 0.000667 0.000 717 0.000 767 0.000 817 0.000 867 0.000 917 0.000668 0.000 718 0.000 768 0.000 818 0.000 868 0.000 918 0.000669 0.000 719 0.000 769 0.000 819 0.000 869 0.000 919 0.000670 0.000 720 0.000 770 0.000 820 0.000 870 0.000 920 0.000671 0.000 721 0.000 771 0.000 821 0.000 871 0.000 921 0.000672 0.000 722 0.000 772 0.000 822 0.000 872 0.000 922 0.000673 0.000 723 0.000 773 0.000 823 0.000 873 0.000 923 0.000674 0.000 724 0.000 774 0.000 824 0.000 874 0.000 924 0.000675 0.000 725 0.000 775 0.000 825 0.000 875 0.000 925 0.000676 0.000 726 0.000 776 0.000 826 0.000 876 0.000 926 0.000677 0.000 727 0.000 777 0.000 827 0.000 877 0.000 927 0.000678 0.000 728 0.000 778 0.000 828 0.000 878 0.000 928 0.000679 0.000 729 0.000 779 0.000 829 0.000 879 0.000 929 0.000680 0.000 730 0.000 780 0.000 830 0.000 880 0.000 930 0.000681 0.000 731 0.000 781 0.000 831 0.000 881 0.000 931 0.000682 0.000 732 0.000 782 0.000 832 0.000 882 0.000 932 0.000683 0.000 733 0.000 783 0.000 833 0.000 883 0.000 933 0.000684 0.000 734 0.000 784 0.000 834 0.000 884 0.000 934 0.000685 0.000 735 0.000 785 0.000 835 0.000 885 0.000 935 0.000686 0.000 736 0.000 786 0.000 836 0.000 886 0.000 936 0.000
Betts Associates Ltd Page 11Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
937 0.000 987 0.000 1037 0.000 1087 0.000 1137 0.000 1187 0.000938 0.000 988 0.000 1038 0.000 1088 0.000 1138 0.000 1188 0.000939 0.000 989 0.000 1039 0.000 1089 0.000 1139 0.000 1189 0.000940 0.000 990 0.000 1040 0.000 1090 0.000 1140 0.000 1190 0.000941 0.000 991 0.000 1041 0.000 1091 0.000 1141 0.000 1191 0.000942 0.000 992 0.000 1042 0.000 1092 0.000 1142 0.000 1192 0.000943 0.000 993 0.000 1043 0.000 1093 0.000 1143 0.000 1193 0.000944 0.000 994 0.000 1044 0.000 1094 0.000 1144 0.000 1194 0.000945 0.000 995 0.000 1045 0.000 1095 0.000 1145 0.000 1195 0.000946 0.000 996 0.000 1046 0.000 1096 0.000 1146 0.000 1196 0.000947 0.000 997 0.000 1047 0.000 1097 0.000 1147 0.000 1197 0.000948 0.000 998 0.000 1048 0.000 1098 0.000 1148 0.000 1198 0.000949 0.000 999 0.000 1049 0.000 1099 0.000 1149 0.000 1199 0.000950 0.000 1000 0.000 1050 0.000 1100 0.000 1150 0.000 1200 0.000951 0.000 1001 0.000 1051 0.000 1101 0.000 1151 0.000 1201 0.000952 0.000 1002 0.000 1052 0.000 1102 0.000 1152 0.000 1202 0.000953 0.000 1003 0.000 1053 0.000 1103 0.000 1153 0.000 1203 0.000954 0.000 1004 0.000 1054 0.000 1104 0.000 1154 0.000 1204 0.000955 0.000 1005 0.000 1055 0.000 1105 0.000 1155 0.000 1205 0.000956 0.000 1006 0.000 1056 0.000 1106 0.000 1156 0.000 1206 0.000957 0.000 1007 0.000 1057 0.000 1107 0.000 1157 0.000 1207 0.000958 0.000 1008 0.000 1058 0.000 1108 0.000 1158 0.000 1208 0.000959 0.000 1009 0.000 1059 0.000 1109 0.000 1159 0.000 1209 0.000960 0.000 1010 0.000 1060 0.000 1110 0.000 1160 0.000 1210 0.000961 0.000 1011 0.000 1061 0.000 1111 0.000 1161 0.000 1211 0.000962 0.000 1012 0.000 1062 0.000 1112 0.000 1162 0.000 1212 0.000963 0.000 1013 0.000 1063 0.000 1113 0.000 1163 0.000 1213 0.000964 0.000 1014 0.000 1064 0.000 1114 0.000 1164 0.000 1214 0.000965 0.000 1015 0.000 1065 0.000 1115 0.000 1165 0.000 1215 0.000966 0.000 1016 0.000 1066 0.000 1116 0.000 1166 0.000 1216 0.000967 0.000 1017 0.000 1067 0.000 1117 0.000 1167 0.000 1217 0.000968 0.000 1018 0.000 1068 0.000 1118 0.000 1168 0.000 1218 0.000969 0.000 1019 0.000 1069 0.000 1119 0.000 1169 0.000 1219 0.000970 0.000 1020 0.000 1070 0.000 1120 0.000 1170 0.000 1220 0.000971 0.000 1021 0.000 1071 0.000 1121 0.000 1171 0.000 1221 0.000972 0.000 1022 0.000 1072 0.000 1122 0.000 1172 0.000 1222 0.000973 0.000 1023 0.000 1073 0.000 1123 0.000 1173 0.000 1223 0.000974 0.000 1024 0.000 1074 0.000 1124 0.000 1174 0.000 1224 0.000975 0.000 1025 0.000 1075 0.000 1125 0.000 1175 0.000 1225 0.000976 0.000 1026 0.000 1076 0.000 1126 0.000 1176 0.000 1226 0.000977 0.000 1027 0.000 1077 0.000 1127 0.000 1177 0.000 1227 0.000978 0.000 1028 0.000 1078 0.000 1128 0.000 1178 0.000 1228 0.000979 0.000 1029 0.000 1079 0.000 1129 0.000 1179 0.000 1229 0.000980 0.000 1030 0.000 1080 0.000 1130 0.000 1180 0.000 1230 0.000981 0.000 1031 0.000 1081 0.000 1131 0.000 1181 0.000 1231 0.000982 0.000 1032 0.000 1082 0.000 1132 0.000 1182 0.000 1232 0.000983 0.000 1033 0.000 1083 0.000 1133 0.000 1183 0.000 1233 0.000984 0.000 1034 0.000 1084 0.000 1134 0.000 1184 0.000 1234 0.000985 0.000 1035 0.000 1085 0.000 1135 0.000 1185 0.000 1235 0.000986 0.000 1036 0.000 1086 0.000 1136 0.000 1186 0.000 1236 0.000
Betts Associates Ltd Page 12Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Surcharged Outfall Details for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
Time(mins)
Depth(m)
1237 0.000 1271 0.000 1305 0.000 1339 0.000 1373 0.000 1407 0.0001238 0.000 1272 0.000 1306 0.000 1340 0.000 1374 0.000 1408 0.0001239 0.000 1273 0.000 1307 0.000 1341 0.000 1375 0.000 1409 0.0001240 0.000 1274 0.000 1308 0.000 1342 0.000 1376 0.000 1410 0.0001241 0.000 1275 0.000 1309 0.000 1343 0.000 1377 0.000 1411 0.0001242 0.000 1276 0.000 1310 0.000 1344 0.000 1378 0.000 1412 0.0001243 0.000 1277 0.000 1311 0.000 1345 0.000 1379 0.000 1413 0.0001244 0.000 1278 0.000 1312 0.000 1346 0.000 1380 0.000 1414 0.0001245 0.000 1279 0.000 1313 0.000 1347 0.000 1381 0.000 1415 0.0001246 0.000 1280 0.000 1314 0.000 1348 0.000 1382 0.000 1416 0.0001247 0.000 1281 0.000 1315 0.000 1349 0.000 1383 0.000 1417 0.0001248 0.000 1282 0.000 1316 0.000 1350 0.000 1384 0.000 1418 0.0001249 0.000 1283 0.000 1317 0.000 1351 0.000 1385 0.000 1419 0.0001250 0.000 1284 0.000 1318 0.000 1352 0.000 1386 0.000 1420 0.0001251 0.000 1285 0.000 1319 0.000 1353 0.000 1387 0.000 1421 0.0001252 0.000 1286 0.000 1320 0.000 1354 0.000 1388 0.000 1422 0.0001253 0.000 1287 0.000 1321 0.000 1355 0.000 1389 0.000 1423 0.0001254 0.000 1288 0.000 1322 0.000 1356 0.000 1390 0.000 1424 0.0001255 0.000 1289 0.000 1323 0.000 1357 0.000 1391 0.000 1425 0.0001256 0.000 1290 0.000 1324 0.000 1358 0.000 1392 0.000 1426 0.0001257 0.000 1291 0.000 1325 0.000 1359 0.000 1393 0.000 1427 0.0001258 0.000 1292 0.000 1326 0.000 1360 0.000 1394 0.000 1428 0.0001259 0.000 1293 0.000 1327 0.000 1361 0.000 1395 0.000 1429 0.0001260 0.000 1294 0.000 1328 0.000 1362 0.000 1396 0.000 1430 0.0001261 0.000 1295 0.000 1329 0.000 1363 0.000 1397 0.000 1431 0.0001262 0.000 1296 0.000 1330 0.000 1364 0.000 1398 0.000 1432 0.0001263 0.000 1297 0.000 1331 0.000 1365 0.000 1399 0.000 1433 0.0001264 0.000 1298 0.000 1332 0.000 1366 0.000 1400 0.000 1434 0.0001265 0.000 1299 0.000 1333 0.000 1367 0.000 1401 0.000 1435 0.0001266 0.000 1300 0.000 1334 0.000 1368 0.000 1402 0.000 1436 0.0001267 0.000 1301 0.000 1335 0.000 1369 0.000 1403 0.000 1437 0.0001268 0.000 1302 0.000 1336 0.000 1370 0.000 1404 0.000 1438 0.0001269 0.000 1303 0.000 1337 0.000 1371 0.000 1405 0.000 1439 0.0001270 0.000 1304 0.000 1338 0.000 1372 0.000 1406 0.000 1440 0.000
Simulation Criteria for SW N1 PDS OUT REV C.SWS
Volumetric Runoff Coeff 0.750 Additional Flow - % of Total Flow 0.000Areal Reduction Factor 1.000 MADD Factor * 10m³/ha Storage 2.000
Hot Start (mins) 0 Inlet Coeffiecient 0.800Hot Start Level (mm) 0 Flow per Person per Day (l/per/day) 0.000
Manhole Headloss Coeff (Global) 0.500 Run Time (mins) 60Foul Sewage per hectare (l/s) 0.000 Output Interval (mins) 1
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall Details
Betts Associates Ltd Page 13Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Synthetic Rainfall Details
©1982-2014 XP Solutions
Rainfall Model FSR Profile Type SummerReturn Period (years) 2 Cv (Summer) 0.750
Region England and Wales Cv (Winter) 0.840M5-60 (mm) 19.200 Storm Duration (mins) 30
Ratio R 0.295
Betts Associates Ltd Page 14Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Online Controls for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Hydro-Brake Optimum® Manhole: S31, DS/PN: S1.009, Volume (m³): 10.1
Unit Reference MD-SHE-0245-3320-1050-3320Design Head (m) 1.050
Design Flow (l/s) 33.2Flush-Flo™ CalculatedObjective Minimise upstream storage
Diameter (mm) 245Invert Level (m) 42.440
Minimum Outlet Pipe Diameter (mm) 300Suggested Manhole Diameter (mm) 1800
Control Points Head (m) Flow (l/s)
Design Point (Calculated) 1.050 32.8Flush-Flo™ 0.398 32.7Kick-Flo® 0.779 28.5
Mean Flow over Head Range - 27.1
The hydrological calculations have been based on the Head/Discharge relationship for theHydro-Brake Optimum® as specified. Should another type of control device other than aHydro-Brake Optimum® be utilised then these storage routing calculations will beinvalidated
Depth (m) Flow (l/s) Depth (m) Flow (l/s) Depth (m) Flow (l/s) Depth (m) Flow (l/s)
0.100 8.0 1.200 35.0 3.000 54.5 7.000 82.20.200 25.0 1.400 37.7 3.500 58.7 7.500 85.00.300 32.3 1.600 40.2 4.000 62.6 8.000 87.70.400 32.7 1.800 42.6 4.500 66.3 8.500 90.40.500 32.4 2.000 44.8 5.000 69.8 9.000 92.90.600 31.7 2.200 46.9 5.500 73.1 9.500 95.40.800 28.8 2.400 48.9 6.000 76.21.000 32.1 2.600 50.8 6.500 79.3
Betts Associates Ltd Page 15Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
Storage Structures for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Tank or Pond Manhole: S31, DS/PN: S1.009
Invert Level (m) 42.440
Depth (m) Area (m²) Depth (m) Area (m²) Depth (m) Area (m²) Depth (m) Area (m²)
0.000 1100.0 1.400 1100.0 2.800 1100.0 4.200 1100.00.200 1100.0 1.600 1100.0 3.000 1100.0 4.400 1100.00.400 1100.0 1.800 1100.0 3.200 1100.0 4.600 1100.00.600 1100.0 2.000 1100.0 3.400 1100.0 4.800 1100.00.800 1100.0 2.200 1100.0 3.600 1100.0 5.000 1100.01.000 1100.0 2.400 1100.0 3.800 1100.01.200 1100.0 2.600 1100.0 4.000 1100.0
Betts Associates Ltd Page 16Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 2 0% 100/15 SummerS1.001 15 Winter 2 0% 30/15 SummerS1.002 15 Winter 2 0% 100/15 SummerS2.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 2 0% 30/15 SummerS2.003 15 Winter 2 0% 30/15 SummerS1.003 15 Winter 2 0% 30/15 SummerS1.004 15 Winter 2 0% 100/15 SummerS1.005 15 Winter 2 0% 30/15 WinterS3.000 15 Winter 2 0% 100/15 SummerS3.001 15 Winter 2 0% 30/15 WinterS4.000 15 Winter 2 0% 30/15 WinterS3.002 15 Winter 2 0% 30/15 SummerS3.003 15 Winter 2 0% 30/15 SummerS5.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 2 0% 30/15 SummerS3.005 15 Winter 2 0% 30/15 SummerS3.006 15 Winter 2 0% 30/15 SummerS6.000 15 Winter 2 0% 100/15 SummerS6.001 15 Winter 2 0% 100/15 Summer
Betts Associates Ltd Page 17Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 15 Winter 2 0% 30/15 WinterS6.003 15 Winter 2 0% 30/15 SummerS6.004 15 Winter 2 0% 30/15 SummerS6.005 15 Winter 2 0% 30/15 SummerS3.007 15 Winter 2 0% 30/15 SummerS3.008 15 Winter 2 0% 30/15 SummerS1.006 15 Winter 2 0% 30/15 SummerS1.007 30 Winter 2 0% 30/15 SummerS1.008 30 Winter 2 0% 30/15 SummerS1.009 360 Winter 2 0% 30/60 WinterS1.010 360 Winter 2 0%S1.011 360 Winter 2 0%S1.012 360 Winter 2 0%S1.013 360 Winter 2 0%S1.014 360 Winter 2 0%S7.000 60 Winter 2 0%S7.001 60 Winter 2 0%S7.002 360 Winter 2 0%S1.015 360 Winter 2 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.127 -0.079 0.000 0.44 0.0 7.5 OKS1.001 S2 44.594 -0.099 0.000 0.60 0.0 22.2 OKS1.002 S3 44.463 -0.132 0.000 0.36 0.0 25.5 OKS2.000 S4 44.799 -0.146 0.000 0.26 0.0 9.8 OKS2.001 S5 44.694 -0.069 0.000 0.79 0.0 30.2 OKS2.002 S6 44.330 -0.082 0.000 0.86 0.0 52.0 OKS2.003 S7 44.255 -0.089 0.000 0.83 0.0 54.1 OKS1.003 S8 44.089 -0.104 0.000 0.86 0.0 89.5 OKS1.004 S9 43.936 -0.190 0.000 0.48 0.0 92.1 OKS1.005 S10 43.368 -0.202 0.000 0.44 0.0 94.6 OKS3.000 S11 44.345 -0.120 0.000 0.43 0.0 23.9 OKS3.001 S12 43.798 -0.109 0.000 0.52 0.0 28.6 OKS4.000 S13 43.649 -0.114 0.000 0.48 0.0 17.7 OKS3.002 S14 43.390 -0.207 0.000 0.55 0.0 52.2 OKS3.003 S15 43.361 -0.213 0.000 0.41 0.0 57.0 OKS5.000 S16 43.584 -0.056 0.000 0.90 0.0 33.0 OKS3.004 S17 43.306 -0.189 0.000 0.61 0.0 86.9 OKS3.005 S18 43.206 -0.171 0.000 0.68 0.0 100.0 OKS3.006 S19 43.142 -0.094 0.000 0.47 0.0 94.0 OKS6.000 S20 43.662 -0.175 0.000 0.11 0.0 3.8 OKS6.001 S21 43.579 -0.157 0.000 0.20 0.0 7.1 OKS6.002 S22 43.496 -0.119 0.000 0.45 0.0 15.8 OKS6.003 S23 43.419 -0.108 0.000 0.52 0.0 18.8 OKS6.004 S24 43.265 -0.151 0.000 0.48 0.0 31.1 OKS6.005 S25 43.153 -0.138 0.000 0.55 0.0 33.6 OKS3.007 S26 43.128 -0.078 0.000 0.56 0.0 118.0 OK
Betts Associates Ltd Page 18Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.107 -0.062 0.000 0.43 0.0 119.2 OKS1.006 S28 43.082 -0.015 0.000 1.02 0.0 199.6 OKS1.007 S29 43.030 -0.189 0.000 0.58 0.0 194.1 OKS1.008 S30 42.973 -0.091 0.000 1.03 0.0 189.0 OKS1.009 S31 42.726 -0.089 0.000 0.27 0.0 25.7 OKS1.010 S32 42.516 -0.233 0.000 0.25 0.0 25.7 OKS1.011 S33 42.461 -0.190 0.000 0.29 0.0 25.8 OKS1.012 S34 42.446 -0.938 0.000 0.04 0.0 26.0 OKS1.013 S35 42.445 -0.914 0.000 0.15 0.0 102.2 OKS1.014 S36 42.363 -0.427 0.000 0.18 0.0 102.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.693 -0.577 0.000 0.00 0.0 0.4 OKS1.015 S40 41.693 -0.517 0.000 0.08 0.0 102.1 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 19Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 30 0% 100/15 SummerS1.001 15 Winter 30 0% 30/15 SummerS1.002 15 Winter 30 0% 100/15 SummerS2.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 30 0% 30/15 SummerS2.003 15 Winter 30 0% 30/15 SummerS1.003 15 Winter 30 0% 30/15 SummerS1.004 15 Winter 30 0% 100/15 SummerS1.005 15 Winter 30 0% 30/15 WinterS3.000 15 Winter 30 0% 100/15 SummerS3.001 15 Winter 30 0% 30/15 WinterS4.000 15 Winter 30 0% 30/15 WinterS3.002 15 Winter 30 0% 30/15 SummerS3.003 15 Winter 30 0% 30/15 SummerS5.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 30 0% 30/15 SummerS3.005 15 Winter 30 0% 30/15 SummerS3.006 15 Winter 30 0% 30/15 SummerS6.000 15 Winter 30 0% 100/15 SummerS6.001 30 Winter 30 0% 100/15 Summer
Betts Associates Ltd Page 20Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 30 0% 30/15 WinterS6.003 30 Winter 30 0% 30/15 SummerS6.004 15 Winter 30 0% 30/15 SummerS6.005 15 Winter 30 0% 30/15 SummerS3.007 15 Winter 30 0% 30/15 SummerS3.008 15 Winter 30 0% 30/15 SummerS1.006 15 Winter 30 0% 30/15 SummerS1.007 15 Winter 30 0% 30/15 SummerS1.008 30 Winter 30 0% 30/15 SummerS1.009 360 Winter 30 0% 30/60 WinterS1.010 360 Winter 30 0%S1.011 360 Winter 30 0%S1.012 360 Winter 30 0%S1.013 360 Winter 30 0%S1.014 360 Winter 30 0%S7.000 60 Winter 30 0%S7.001 60 Winter 30 0%S7.002 360 Winter 30 0%S1.015 360 Winter 30 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.164 -0.042 0.000 0.82 0.0 14.3 OKS1.001 S2 44.754 0.061 0.000 1.27 0.0 47.3 SURCHARGEDS1.002 S3 44.529 -0.065 0.000 0.76 0.0 54.3 OKS2.000 S4 45.454 0.509 0.000 0.49 0.0 18.3 SURCHARGEDS2.001 S5 45.421 0.658 0.000 1.31 0.0 50.1 SURCHARGEDS2.002 S6 44.808 0.396 0.000 1.50 0.0 90.3 SURCHARGEDS2.003 S7 44.644 0.300 0.000 1.46 0.0 95.4 SURCHARGEDS1.003 S8 44.305 0.112 0.000 1.64 0.0 170.2 SURCHARGEDS1.004 S9 44.039 -0.087 0.000 0.92 0.0 175.5 OKS1.005 S10 43.668 0.098 0.000 0.78 0.0 168.0 SURCHARGEDS3.000 S11 44.398 -0.067 0.000 0.82 0.0 45.2 OKS3.001 S12 43.927 0.020 0.000 0.99 0.0 54.1 SURCHARGEDS4.000 S13 43.819 0.056 0.000 0.89 0.0 32.7 SURCHARGEDS3.002 S14 43.772 0.175 0.000 0.98 0.0 92.6 SURCHARGEDS3.003 S15 43.756 0.182 0.000 0.70 0.0 96.9 SURCHARGEDS5.000 S16 43.925 0.285 0.000 1.61 0.0 59.1 SURCHARGEDS3.004 S17 43.724 0.229 0.000 0.95 0.0 134.4 SURCHARGEDS3.005 S18 43.646 0.269 0.000 1.01 0.0 149.2 SURCHARGEDS3.006 S19 43.513 0.277 0.000 0.85 0.0 169.3 SURCHARGEDS6.000 S20 43.682 -0.155 0.000 0.20 0.0 7.2 OKS6.001 S21 43.658 -0.078 0.000 0.34 0.0 12.1 OKS6.002 S22 43.642 0.027 0.000 0.81 0.0 28.2 SURCHARGEDS6.003 S23 43.609 0.082 0.000 0.92 0.0 32.9 SURCHARGEDS6.004 S24 43.568 0.152 0.000 0.96 0.0 62.0 SURCHARGEDS6.005 S25 43.527 0.236 0.000 1.00 0.0 61.6 SURCHARGEDS3.007 S26 43.487 0.281 0.000 1.03 0.0 215.8 SURCHARGED
Betts Associates Ltd Page 21Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.449 0.280 0.000 0.77 0.0 214.8 SURCHARGEDS1.006 S28 43.402 0.305 0.000 1.97 0.0 385.8 SURCHARGEDS1.007 S29 43.251 0.032 0.000 1.11 0.0 370.4 SURCHARGEDS1.008 S30 43.146 0.082 0.000 2.01 0.0 368.1 SURCHARGEDS1.009 S31 42.964 0.149 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.370 -0.420 0.000 0.20 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.699 -0.571 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.5 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 22Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 100 +30% 100/15 SummerS1.001 15 Winter 100 +30% 30/15 SummerS1.002 15 Winter 100 +30% 100/15 SummerS2.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 100 +30% 30/15 SummerS2.003 15 Winter 100 +30% 30/15 SummerS1.003 15 Winter 100 +30% 30/15 SummerS1.004 15 Winter 100 +30% 100/15 SummerS1.005 30 Winter 100 +30% 30/15 WinterS3.000 15 Winter 100 +30% 100/15 SummerS3.001 15 Winter 100 +30% 30/15 WinterS4.000 15 Winter 100 +30% 30/15 WinterS3.002 30 Winter 100 +30% 30/15 SummerS3.003 30 Winter 100 +30% 30/15 SummerS5.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S3.004 30 Winter 100 +30% 30/15 SummerS3.005 30 Winter 100 +30% 30/15 SummerS3.006 30 Winter 100 +30% 30/15 SummerS6.000 30 Winter 100 +30% 100/15 SummerS6.001 30 Winter 100 +30% 100/15 Summer
Betts Associates Ltd Page 23Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 100 +30% 30/15 WinterS6.003 30 Winter 100 +30% 30/15 SummerS6.004 30 Winter 100 +30% 30/15 SummerS6.005 30 Winter 100 +30% 30/15 SummerS3.007 30 Winter 100 +30% 30/15 SummerS3.008 30 Winter 100 +30% 30/15 SummerS1.006 30 Winter 100 +30% 30/15 SummerS1.007 30 Winter 100 +30% 30/15 SummerS1.008 360 Winter 100 +30% 30/15 SummerS1.009 360 Winter 100 +30% 30/60 WinterS1.010 1440 Winter 100 +30%S1.011 1440 Summer 100 +30%S1.012 1440 Summer 100 +30%S1.013 1440 Summer 100 +30%S1.014 1440 Winter 100 +30%S7.000 60 Winter 100 +30%S7.001 60 Winter 100 +30%S7.002 1440 Summer 100 +30%S1.015 480 Winter 100 +30%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 46.136 0.930 0.000 1.01 0.0 17.6 FLOOD RISKS1.001 S2 45.731 1.039 0.000 1.54 0.0 57.2 SURCHARGEDS1.002 S3 45.557 0.963 0.000 0.89 0.0 63.3 SURCHARGEDS2.000 S4 46.282 1.337 10.017 1.49 0.0 55.6 FLOODS2.001 S5 46.355 1.592 2.080 1.68 0.0 64.5 FLOODS2.002 S6 46.021 1.609 0.000 2.05 0.0 123.5 SURCHARGEDS2.003 S7 45.774 1.430 0.000 1.91 0.0 124.7 SURCHARGEDS1.003 S8 45.303 1.110 0.000 2.11 0.0 218.7 SURCHARGEDS1.004 S9 45.020 0.894 0.000 1.16 0.0 219.5 SURCHARGEDS1.005 S10 44.301 0.731 0.000 0.99 0.0 214.0 SURCHARGEDS3.000 S11 45.505 1.040 0.000 1.03 0.0 57.2 FLOOD RISKS3.001 S12 44.997 1.090 0.000 1.10 0.0 60.3 FLOOD RISKS4.000 S13 44.799 1.036 0.000 1.12 0.0 41.6 FLOOD RISKS3.002 S14 44.657 1.060 0.000 1.08 0.0 102.2 FLOOD RISKS3.003 S15 44.633 1.059 0.000 0.82 0.0 114.1 FLOOD RISKS5.000 S16 44.956 1.316 1.858 2.03 0.0 74.2 FLOODS3.004 S17 44.580 1.085 0.000 1.27 0.0 180.4 SURCHARGEDS3.005 S18 44.392 1.015 0.000 1.50 0.0 220.7 SURCHARGEDS3.006 S19 44.070 0.834 0.000 1.33 0.0 264.7 SURCHARGEDS6.000 S20 44.478 0.641 0.000 0.22 0.0 7.9 FLOOD RISKS6.001 S21 44.464 0.728 0.000 0.40 0.0 14.4 SURCHARGEDS6.002 S22 44.437 0.822 0.000 0.88 0.0 30.7 SURCHARGEDS6.003 S23 44.369 0.842 0.000 1.03 0.0 37.0 SURCHARGEDS6.004 S24 44.253 0.837 0.000 1.03 0.0 66.6 SURCHARGEDS6.005 S25 44.133 0.842 0.000 1.18 0.0 72.4 SURCHARGEDS3.007 S26 44.029 0.823 0.000 1.62 0.0 341.2 SURCHARGED
Betts Associates Ltd Page 24Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:38 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.955 0.786 0.000 1.25 0.0 345.6 SURCHARGEDS1.006 S28 43.843 0.746 0.000 2.98 0.0 581.3 SURCHARGEDS1.007 S29 43.508 0.289 0.000 1.72 0.0 570.9 FLOOD RISKS1.008 S30 43.424 0.360 0.000 0.95 0.0 174.3 SURCHARGEDS1.009 S31 43.420 0.605 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.370 -0.420 0.000 0.20 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.699 -0.571 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.5 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
DWH133 – Development off Mitton Road, Whalley
Surface Water Drainage Simulation Output
Existing Culvert 5% Sedimentation Depth
April 2016
Betts Associates Ltd Page 0Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
« - Indicates pipe capacity < flow
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.000 51.353 0.514 100.0 0.050 5.00 0.0 0.600 o 150S1.001 14.751 0.098 150.0 0.112 0.00 0.0 0.600 o 225S1.002 17.206 0.401 42.9 0.025 0.00 0.0 0.600 o 225
S2.000 30.887 0.182 169.7 0.064 5.00 0.0 0.600 o 225S2.001 59.656 0.351 170.0 0.165 0.00 0.0 0.600 o 225S2.002 16.642 0.068 244.7 0.179 0.00 0.0 0.600 o 300S2.003 36.923 0.151 244.5 0.025 0.00 0.0 0.600 o 300
S1.003 16.285 0.067 243.1 0.105 0.00 0.0 0.600 o 375S1.004 53.260 0.556 95.8 0.025 0.00 0.0 0.600 o 375S1.005 32.531 0.473 68.8 0.025 0.00 0.0 0.600 o 375
S3.000 44.740 0.558 80.2 0.156 5.00 0.0 0.600 o 225S3.001 23.497 0.310 75.8 0.035 0.00 0.0 0.600 o 225
S4.000 28.283 0.166 170.4 0.114 5.00 0.0 0.600 o 225
S3.002 9.228 0.023 401.2 0.047 0.00 0.0 0.600 o 450
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.000 50.00 5.85 45.056 0.050 0.0 0.0 0.0 1.00 17.8 6.8S1.001 50.00 6.08 44.467 0.162 0.0 0.0 0.0 1.07 42.4 21.9S1.002 50.00 6.23 44.369 0.187 0.0 0.0 0.0 2.00 79.6 25.3
S2.000 50.00 5.51 44.720 0.064 0.0 0.0 0.0 1.00 39.8 8.7S2.001 50.00 6.51 44.538 0.229 0.0 0.0 0.0 1.00 39.8 31.0S2.002 50.00 6.79 44.112 0.408 0.0 0.0 0.0 1.00 70.7 55.2S2.003 49.08 7.40 44.044 0.433 0.0 0.0 0.0 1.00 70.8 57.6
S1.003 48.41 7.64 43.818 0.725 0.0 0.0 0.0 1.16 127.9 95.1S1.004 47.10 8.11 43.751 0.750 0.0 0.0 0.0 1.85 204.5 95.7S1.005 46.45 8.36 43.195 0.775 0.0 0.0 0.0 2.19 241.6 97.5
S3.000 50.00 5.51 44.240 0.156 0.0 0.0 0.0 1.46 58.1 21.1S3.001 50.00 5.77 43.682 0.191 0.0 0.0 0.0 1.50 59.8 25.9
S4.000 50.00 5.47 43.538 0.114 0.0 0.0 0.0 1.00 39.7 15.4
S3.002 50.00 5.92 43.147 0.352 0.0 0.0 0.0 1.01 160.4 47.7
Betts Associates Ltd Page 1Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S3.003 31.828 0.079 402.9 0.050 0.00 0.0 0.600 o 450
S5.000 24.668 0.145 170.1 0.214 5.00 0.0 0.600 o 225
S3.004 49.688 0.118 421.1 0.025 0.00 0.0 0.600 o 450S3.005 56.326 0.141 399.5 0.171 0.00 0.0 0.600 o 450S3.006 11.861 0.030 395.4 0.172 0.00 0.0 0.600 o 600
S6.000 17.226 0.101 170.6 0.025 5.00 0.0 0.600 o 225S6.001 20.616 0.121 170.4 0.025 0.00 0.0 0.600 o 225S6.002 14.998 0.088 170.4 0.067 0.00 0.0 0.600 o 225S6.003 18.820 0.111 169.5 0.025 0.00 0.0 0.600 o 225S6.004 30.619 0.125 245.0 0.100 0.00 0.0 0.600 o 300S6.005 19.803 0.081 244.5 0.025 0.00 0.0 0.600 o 300
S3.007 14.635 0.037 395.5 0.025 0.00 0.0 0.600 o 600S3.008 28.820 0.072 400.3 0.025 0.00 0.0 0.600 o 600
S1.006 11.015 0.028 393.4 0.093 0.00 0.0 0.600 o 600S1.007 55.720 0.005 11144.0 0.000 0.00 0.0 0.600 o 750S1.008 9.667 0.024 402.8 0.025 0.00 0.0 0.600 o 600
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S3.003 50.00 6.45 43.124 0.402 0.0 0.0 0.0 1.01 160.1 54.4
S5.000 50.00 5.41 43.415 0.214 0.0 0.0 0.0 1.00 39.7 29.0
S3.004 49.41 7.29 43.045 0.641 0.0 0.0 0.0 0.98 156.6 85.8S3.005 46.82 8.22 42.927 0.812 0.0 0.0 0.0 1.01 160.8 103.0S3.006 46.40 8.38 42.636 0.984 0.0 0.0 0.0 1.22 344.5 123.7
S6.000 50.00 5.29 43.612 0.025 0.0 0.0 0.0 1.00 39.7 3.4S6.001 50.00 5.63 43.511 0.050 0.0 0.0 0.0 1.00 39.7 6.8S6.002 50.00 5.88 43.390 0.117 0.0 0.0 0.0 1.00 39.7 15.8S6.003 50.00 6.20 43.302 0.142 0.0 0.0 0.0 1.00 39.8 19.2S6.004 50.00 6.71 43.116 0.242 0.0 0.0 0.0 1.00 70.7 32.8S6.005 50.00 7.04 42.991 0.267 0.0 0.0 0.0 1.00 70.8 36.2
S3.007 45.90 8.58 42.606 1.276 0.0 0.0 0.0 1.22 344.5 158.6S3.008 44.94 8.98 42.569 1.301 0.0 0.0 0.0 1.21 342.4 158.6
S1.006 44.59 9.13 42.497 2.169 0.0 0.0 0.0 1.22 345.4 261.9S1.007 37.76 12.77 42.469 2.169 0.0 0.0 0.0 0.26 112.7« 261.9S1.008 37.56 12.90 42.464 2.194 0.0 0.0 0.0 1.21 341.3 261.9
Betts Associates Ltd Page 2Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.009 19.905 0.066 300.0 0.025 0.00 0.0 0.600 o 375S1.010 29.494 0.098 301.0 0.000 0.00 0.0 0.600 o 375S1.011 12.510 0.042 300.0 0.000 0.00 0.0 0.600 o 375S1.012 6.031 0.025 241.2 0.000 0.00 0.0 0.032 |_| -1S1.013 4.585 0.019 241.3 0.000 0.00 76.4 0.032 |_| -1S1.014 73.636 0.580 127.0 0.000 0.00 0.0 0.600 o 600
S7.000 9.803 0.010 980.3 0.000 5.00 0.0 0.032 |_| -2S7.001 9.717 0.070 138.8 0.000 0.00 0.0 0.032 |_| -2S7.002 10.837 0.060 180.6 0.000 0.00 0.0 0.032 |_| -2
S1.015 5.117 0.012 426.4 0.000 0.00 0.0 0.032 |_| -2
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.009 37.10 13.22 42.440 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.010 36.44 13.69 42.374 2.219 0.0 0.0 0.0 1.04 114.8« 261.9S1.011 36.17 13.89 42.276 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.012 36.03 14.00 42.234 2.219 0.0 0.0 0.0 0.95 981.2 261.9S1.013 35.92 14.08 42.209 2.219 76.4 0.0 0.0 0.95 981.0 292.3S1.014 35.19 14.65 42.190 2.219 76.4 0.0 0.0 2.16 610.7 292.3
S7.000 50.00 5.28 41.720 0.000 0.0 0.0 0.0 0.58 1086.2 0.0S7.001 50.00 5.39 41.710 0.000 0.0 0.0 0.0 1.54 2886.6 0.0S7.002 50.00 5.52 41.640 0.000 0.0 0.0 0.0 1.35 2530.6 0.0
S1.015 35.07 14.75 41.580 2.219 76.4 0.0 0.0 0.88 1647.0 292.3
Betts Associates Ltd Page 3Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 2 0% 100/15 SummerS1.001 15 Winter 2 0% 30/15 SummerS1.002 15 Winter 2 0% 100/15 SummerS2.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 2 0% 30/15 SummerS2.003 15 Winter 2 0% 30/15 SummerS1.003 15 Winter 2 0% 30/15 SummerS1.004 15 Winter 2 0% 100/15 SummerS1.005 15 Winter 2 0% 30/15 WinterS3.000 15 Winter 2 0% 100/15 SummerS3.001 15 Winter 2 0% 30/15 WinterS4.000 15 Winter 2 0% 30/15 WinterS3.002 15 Winter 2 0% 30/15 SummerS3.003 15 Winter 2 0% 30/15 SummerS5.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 2 0% 30/15 SummerS3.005 15 Winter 2 0% 30/15 SummerS3.006 15 Winter 2 0% 30/15 SummerS6.000 15 Winter 2 0% 100/15 SummerS6.001 15 Winter 2 0% 100/15 Summer
Betts Associates Ltd Page 4Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 15 Winter 2 0% 30/15 WinterS6.003 15 Winter 2 0% 30/15 SummerS6.004 15 Winter 2 0% 30/15 SummerS6.005 15 Winter 2 0% 30/15 SummerS3.007 15 Winter 2 0% 30/15 SummerS3.008 15 Winter 2 0% 30/15 SummerS1.006 15 Winter 2 0% 30/15 SummerS1.007 30 Winter 2 0% 30/15 SummerS1.008 30 Winter 2 0% 30/15 SummerS1.009 360 Winter 2 0% 30/60 WinterS1.010 360 Winter 2 0%S1.011 360 Winter 2 0%S1.012 360 Winter 2 0%S1.013 360 Winter 2 0%S1.014 360 Winter 2 0%S7.000 60 Winter 2 0%S7.001 60 Winter 2 0%S7.002 360 Winter 2 0%S1.015 360 Winter 2 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.127 -0.079 0.000 0.44 0.0 7.5 OKS1.001 S2 44.594 -0.099 0.000 0.60 0.0 22.2 OKS1.002 S3 44.463 -0.132 0.000 0.36 0.0 25.5 OKS2.000 S4 44.799 -0.146 0.000 0.26 0.0 9.8 OKS2.001 S5 44.694 -0.069 0.000 0.79 0.0 30.2 OKS2.002 S6 44.330 -0.082 0.000 0.86 0.0 52.0 OKS2.003 S7 44.255 -0.089 0.000 0.83 0.0 54.1 OKS1.003 S8 44.089 -0.104 0.000 0.86 0.0 89.5 OKS1.004 S9 43.936 -0.190 0.000 0.48 0.0 92.1 OKS1.005 S10 43.368 -0.202 0.000 0.44 0.0 94.6 OKS3.000 S11 44.345 -0.120 0.000 0.43 0.0 23.9 OKS3.001 S12 43.798 -0.109 0.000 0.52 0.0 28.6 OKS4.000 S13 43.649 -0.114 0.000 0.48 0.0 17.7 OKS3.002 S14 43.390 -0.207 0.000 0.55 0.0 52.2 OKS3.003 S15 43.361 -0.213 0.000 0.41 0.0 57.0 OKS5.000 S16 43.584 -0.056 0.000 0.90 0.0 33.0 OKS3.004 S17 43.306 -0.189 0.000 0.61 0.0 86.9 OKS3.005 S18 43.206 -0.171 0.000 0.68 0.0 100.0 OKS3.006 S19 43.142 -0.094 0.000 0.47 0.0 94.0 OKS6.000 S20 43.662 -0.175 0.000 0.11 0.0 3.8 OKS6.001 S21 43.579 -0.157 0.000 0.20 0.0 7.1 OKS6.002 S22 43.496 -0.119 0.000 0.45 0.0 15.8 OKS6.003 S23 43.419 -0.108 0.000 0.52 0.0 18.8 OKS6.004 S24 43.265 -0.151 0.000 0.48 0.0 31.1 OKS6.005 S25 43.153 -0.138 0.000 0.55 0.0 33.6 OKS3.007 S26 43.128 -0.078 0.000 0.56 0.0 118.0 OK
Betts Associates Ltd Page 5Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.107 -0.062 0.000 0.43 0.0 119.2 OKS1.006 S28 43.082 -0.015 0.000 1.02 0.0 199.6 OKS1.007 S29 43.030 -0.189 0.000 0.58 0.0 194.1 OKS1.008 S30 42.973 -0.091 0.000 1.03 0.0 189.0 OKS1.009 S31 42.726 -0.089 0.000 0.27 0.0 25.7 OKS1.010 S32 42.516 -0.233 0.000 0.25 0.0 25.7 OKS1.011 S33 42.461 -0.190 0.000 0.29 0.0 25.8 OKS1.012 S34 42.446 -0.938 0.000 0.04 0.0 26.0 OKS1.013 S35 42.445 -0.914 0.000 0.15 0.0 102.2 OKS1.014 S36 42.365 -0.425 0.000 0.19 0.0 102.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.693 -0.577 0.000 0.00 0.0 0.4 OKS1.015 S40 41.693 -0.517 0.000 0.08 0.0 102.1 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 6Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 30 0% 100/15 SummerS1.001 15 Winter 30 0% 30/15 SummerS1.002 15 Winter 30 0% 100/15 SummerS2.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 30 0% 30/15 SummerS2.003 15 Winter 30 0% 30/15 SummerS1.003 15 Winter 30 0% 30/15 SummerS1.004 15 Winter 30 0% 100/15 SummerS1.005 15 Winter 30 0% 30/15 WinterS3.000 15 Winter 30 0% 100/15 SummerS3.001 15 Winter 30 0% 30/15 WinterS4.000 15 Winter 30 0% 30/15 WinterS3.002 15 Winter 30 0% 30/15 SummerS3.003 15 Winter 30 0% 30/15 SummerS5.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 30 0% 30/15 SummerS3.005 15 Winter 30 0% 30/15 SummerS3.006 15 Winter 30 0% 30/15 SummerS6.000 15 Winter 30 0% 100/15 SummerS6.001 30 Winter 30 0% 100/15 Summer
Betts Associates Ltd Page 7Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 30 0% 30/15 WinterS6.003 30 Winter 30 0% 30/15 SummerS6.004 15 Winter 30 0% 30/15 SummerS6.005 15 Winter 30 0% 30/15 SummerS3.007 15 Winter 30 0% 30/15 SummerS3.008 15 Winter 30 0% 30/15 SummerS1.006 15 Winter 30 0% 30/15 SummerS1.007 15 Winter 30 0% 30/15 SummerS1.008 30 Winter 30 0% 30/15 SummerS1.009 360 Winter 30 0% 30/60 WinterS1.010 360 Winter 30 0%S1.011 360 Winter 30 0%S1.012 360 Winter 30 0%S1.013 360 Winter 30 0%S1.014 360 Winter 30 0%S7.000 60 Winter 30 0%S7.001 60 Winter 30 0%S7.002 480 Summer 30 0%S1.015 240 Winter 30 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.164 -0.042 0.000 0.82 0.0 14.3 OKS1.001 S2 44.754 0.061 0.000 1.27 0.0 47.3 SURCHARGEDS1.002 S3 44.529 -0.065 0.000 0.76 0.0 54.3 OKS2.000 S4 45.454 0.509 0.000 0.49 0.0 18.3 SURCHARGEDS2.001 S5 45.421 0.658 0.000 1.31 0.0 50.1 SURCHARGEDS2.002 S6 44.808 0.396 0.000 1.50 0.0 90.3 SURCHARGEDS2.003 S7 44.644 0.300 0.000 1.46 0.0 95.4 SURCHARGEDS1.003 S8 44.305 0.112 0.000 1.64 0.0 170.2 SURCHARGEDS1.004 S9 44.039 -0.087 0.000 0.92 0.0 175.5 OKS1.005 S10 43.668 0.098 0.000 0.78 0.0 168.0 SURCHARGEDS3.000 S11 44.398 -0.067 0.000 0.82 0.0 45.2 OKS3.001 S12 43.927 0.020 0.000 0.99 0.0 54.1 SURCHARGEDS4.000 S13 43.819 0.056 0.000 0.89 0.0 32.7 SURCHARGEDS3.002 S14 43.772 0.175 0.000 0.98 0.0 92.6 SURCHARGEDS3.003 S15 43.756 0.182 0.000 0.70 0.0 96.9 SURCHARGEDS5.000 S16 43.925 0.285 0.000 1.61 0.0 59.1 SURCHARGEDS3.004 S17 43.724 0.229 0.000 0.95 0.0 134.4 SURCHARGEDS3.005 S18 43.646 0.269 0.000 1.01 0.0 149.2 SURCHARGEDS3.006 S19 43.513 0.277 0.000 0.85 0.0 169.3 SURCHARGEDS6.000 S20 43.682 -0.155 0.000 0.20 0.0 7.2 OKS6.001 S21 43.658 -0.078 0.000 0.34 0.0 12.1 OKS6.002 S22 43.642 0.027 0.000 0.81 0.0 28.2 SURCHARGEDS6.003 S23 43.609 0.082 0.000 0.92 0.0 32.9 SURCHARGEDS6.004 S24 43.568 0.152 0.000 0.96 0.0 62.0 SURCHARGEDS6.005 S25 43.527 0.236 0.000 1.00 0.0 61.6 SURCHARGEDS3.007 S26 43.487 0.281 0.000 1.03 0.0 215.8 SURCHARGED
Betts Associates Ltd Page 8Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.449 0.280 0.000 0.77 0.0 214.8 SURCHARGEDS1.006 S28 43.402 0.305 0.000 1.97 0.0 385.8 SURCHARGEDS1.007 S29 43.251 0.032 0.000 1.11 0.0 370.4 SURCHARGEDS1.008 S30 43.146 0.082 0.000 2.01 0.0 368.1 SURCHARGEDS1.009 S31 42.964 0.149 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.372 -0.418 0.000 0.20 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.698 -0.572 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.3 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 9Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 100 +30% 100/15 SummerS1.001 15 Winter 100 +30% 30/15 SummerS1.002 15 Winter 100 +30% 100/15 SummerS2.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 100 +30% 30/15 SummerS2.003 15 Winter 100 +30% 30/15 SummerS1.003 15 Winter 100 +30% 30/15 SummerS1.004 15 Winter 100 +30% 100/15 SummerS1.005 30 Winter 100 +30% 30/15 WinterS3.000 15 Winter 100 +30% 100/15 SummerS3.001 15 Winter 100 +30% 30/15 WinterS4.000 15 Winter 100 +30% 30/15 WinterS3.002 30 Winter 100 +30% 30/15 SummerS3.003 30 Winter 100 +30% 30/15 SummerS5.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S3.004 30 Winter 100 +30% 30/15 SummerS3.005 30 Winter 100 +30% 30/15 SummerS3.006 30 Winter 100 +30% 30/15 SummerS6.000 30 Winter 100 +30% 100/15 SummerS6.001 30 Winter 100 +30% 100/15 Summer
Betts Associates Ltd Page 10Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 100 +30% 30/15 WinterS6.003 30 Winter 100 +30% 30/15 SummerS6.004 30 Winter 100 +30% 30/15 SummerS6.005 30 Winter 100 +30% 30/15 SummerS3.007 30 Winter 100 +30% 30/15 SummerS3.008 30 Winter 100 +30% 30/15 SummerS1.006 30 Winter 100 +30% 30/15 SummerS1.007 30 Winter 100 +30% 30/15 SummerS1.008 360 Winter 100 +30% 30/15 SummerS1.009 360 Winter 100 +30% 30/60 WinterS1.010 1440 Winter 100 +30%S1.011 1440 Summer 100 +30%S1.012 1440 Summer 100 +30%S1.013 1440 Summer 100 +30%S1.014 1440 Winter 100 +30%S7.000 60 Winter 100 +30%S7.001 60 Winter 100 +30%S7.002 1440 Summer 100 +30%S1.015 1440 Winter 100 +30%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 46.136 0.930 0.000 1.01 0.0 17.6 FLOOD RISKS1.001 S2 45.731 1.039 0.000 1.54 0.0 57.2 SURCHARGEDS1.002 S3 45.557 0.963 0.000 0.89 0.0 63.3 SURCHARGEDS2.000 S4 46.282 1.337 10.017 1.49 0.0 55.6 FLOODS2.001 S5 46.355 1.592 2.080 1.68 0.0 64.5 FLOODS2.002 S6 46.021 1.609 0.000 2.05 0.0 123.5 SURCHARGEDS2.003 S7 45.774 1.430 0.000 1.91 0.0 124.7 SURCHARGEDS1.003 S8 45.303 1.110 0.000 2.11 0.0 218.7 SURCHARGEDS1.004 S9 45.020 0.894 0.000 1.16 0.0 219.5 SURCHARGEDS1.005 S10 44.301 0.731 0.000 0.99 0.0 214.0 SURCHARGEDS3.000 S11 45.505 1.040 0.000 1.03 0.0 57.2 FLOOD RISKS3.001 S12 44.997 1.090 0.000 1.10 0.0 60.3 FLOOD RISKS4.000 S13 44.799 1.036 0.000 1.12 0.0 41.6 FLOOD RISKS3.002 S14 44.657 1.060 0.000 1.08 0.0 102.2 FLOOD RISKS3.003 S15 44.633 1.059 0.000 0.82 0.0 114.1 FLOOD RISKS5.000 S16 44.956 1.316 1.858 2.03 0.0 74.2 FLOODS3.004 S17 44.580 1.085 0.000 1.27 0.0 180.4 SURCHARGEDS3.005 S18 44.392 1.015 0.000 1.50 0.0 220.7 SURCHARGEDS3.006 S19 44.070 0.834 0.000 1.33 0.0 264.7 SURCHARGEDS6.000 S20 44.478 0.641 0.000 0.22 0.0 7.9 FLOOD RISKS6.001 S21 44.464 0.728 0.000 0.40 0.0 14.4 SURCHARGEDS6.002 S22 44.437 0.822 0.000 0.88 0.0 30.7 SURCHARGEDS6.003 S23 44.369 0.842 0.000 1.03 0.0 37.0 SURCHARGEDS6.004 S24 44.253 0.837 0.000 1.03 0.0 66.6 SURCHARGEDS6.005 S25 44.133 0.842 0.000 1.18 0.0 72.4 SURCHARGEDS3.007 S26 44.029 0.823 0.000 1.62 0.0 341.2 SURCHARGED
Betts Associates Ltd Page 11Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:46 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.955 0.786 0.000 1.25 0.0 345.6 SURCHARGEDS1.006 S28 43.843 0.746 0.000 2.98 0.0 581.3 SURCHARGEDS1.007 S29 43.508 0.289 0.000 1.72 0.0 570.9 FLOOD RISKS1.008 S30 43.424 0.360 0.000 0.95 0.0 174.3 SURCHARGEDS1.009 S31 43.420 0.605 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.372 -0.418 0.000 0.20 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.699 -0.571 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.5 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
DWH133 – Development off Mitton Road, Whalley
Surface Water Drainage Simulation Output
Existing Culvert 25% Sedimentation Depth
April 2016
Betts Associates Ltd Page 0Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
« - Indicates pipe capacity < flow
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.000 51.353 0.514 100.0 0.050 5.00 0.0 0.600 o 150S1.001 14.751 0.098 150.0 0.112 0.00 0.0 0.600 o 225S1.002 17.206 0.401 42.9 0.025 0.00 0.0 0.600 o 225
S2.000 30.887 0.182 169.7 0.064 5.00 0.0 0.600 o 225S2.001 59.656 0.351 170.0 0.165 0.00 0.0 0.600 o 225S2.002 16.642 0.068 244.7 0.179 0.00 0.0 0.600 o 300S2.003 36.923 0.151 244.5 0.025 0.00 0.0 0.600 o 300
S1.003 16.285 0.067 243.1 0.105 0.00 0.0 0.600 o 375S1.004 53.260 0.556 95.8 0.025 0.00 0.0 0.600 o 375S1.005 32.531 0.473 68.8 0.025 0.00 0.0 0.600 o 375
S3.000 44.740 0.558 80.2 0.156 5.00 0.0 0.600 o 225S3.001 23.497 0.310 75.8 0.035 0.00 0.0 0.600 o 225
S4.000 28.283 0.166 170.4 0.114 5.00 0.0 0.600 o 225
S3.002 9.228 0.023 401.2 0.047 0.00 0.0 0.600 o 450
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.000 50.00 5.85 45.056 0.050 0.0 0.0 0.0 1.00 17.8 6.8S1.001 50.00 6.08 44.467 0.162 0.0 0.0 0.0 1.07 42.4 21.9S1.002 50.00 6.23 44.369 0.187 0.0 0.0 0.0 2.00 79.6 25.3
S2.000 50.00 5.51 44.720 0.064 0.0 0.0 0.0 1.00 39.8 8.7S2.001 50.00 6.51 44.538 0.229 0.0 0.0 0.0 1.00 39.8 31.0S2.002 50.00 6.79 44.112 0.408 0.0 0.0 0.0 1.00 70.7 55.2S2.003 49.08 7.40 44.044 0.433 0.0 0.0 0.0 1.00 70.8 57.6
S1.003 48.41 7.64 43.818 0.725 0.0 0.0 0.0 1.16 127.9 95.1S1.004 47.10 8.11 43.751 0.750 0.0 0.0 0.0 1.85 204.5 95.7S1.005 46.45 8.36 43.195 0.775 0.0 0.0 0.0 2.19 241.6 97.5
S3.000 50.00 5.51 44.240 0.156 0.0 0.0 0.0 1.46 58.1 21.1S3.001 50.00 5.77 43.682 0.191 0.0 0.0 0.0 1.50 59.8 25.9
S4.000 50.00 5.47 43.538 0.114 0.0 0.0 0.0 1.00 39.7 15.4
S3.002 50.00 5.92 43.147 0.352 0.0 0.0 0.0 1.01 160.4 47.7
Betts Associates Ltd Page 1Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S3.003 31.828 0.079 402.9 0.050 0.00 0.0 0.600 o 450
S5.000 24.668 0.145 170.1 0.214 5.00 0.0 0.600 o 225
S3.004 49.688 0.118 421.1 0.025 0.00 0.0 0.600 o 450S3.005 56.326 0.141 399.5 0.171 0.00 0.0 0.600 o 450S3.006 11.861 0.030 395.4 0.172 0.00 0.0 0.600 o 600
S6.000 17.226 0.101 170.6 0.025 5.00 0.0 0.600 o 225S6.001 20.616 0.121 170.4 0.025 0.00 0.0 0.600 o 225S6.002 14.998 0.088 170.4 0.067 0.00 0.0 0.600 o 225S6.003 18.820 0.111 169.5 0.025 0.00 0.0 0.600 o 225S6.004 30.619 0.125 245.0 0.100 0.00 0.0 0.600 o 300S6.005 19.803 0.081 244.5 0.025 0.00 0.0 0.600 o 300
S3.007 14.635 0.037 395.5 0.025 0.00 0.0 0.600 o 600S3.008 28.820 0.072 400.3 0.025 0.00 0.0 0.600 o 600
S1.006 11.015 0.028 393.4 0.093 0.00 0.0 0.600 o 600S1.007 55.720 0.005 11144.0 0.000 0.00 0.0 0.600 o 750S1.008 9.667 0.024 402.8 0.025 0.00 0.0 0.600 o 600
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S3.003 50.00 6.45 43.124 0.402 0.0 0.0 0.0 1.01 160.1 54.4
S5.000 50.00 5.41 43.415 0.214 0.0 0.0 0.0 1.00 39.7 29.0
S3.004 49.41 7.29 43.045 0.641 0.0 0.0 0.0 0.98 156.6 85.8S3.005 46.82 8.22 42.927 0.812 0.0 0.0 0.0 1.01 160.8 103.0S3.006 46.40 8.38 42.636 0.984 0.0 0.0 0.0 1.22 344.5 123.7
S6.000 50.00 5.29 43.612 0.025 0.0 0.0 0.0 1.00 39.7 3.4S6.001 50.00 5.63 43.511 0.050 0.0 0.0 0.0 1.00 39.7 6.8S6.002 50.00 5.88 43.390 0.117 0.0 0.0 0.0 1.00 39.7 15.8S6.003 50.00 6.20 43.302 0.142 0.0 0.0 0.0 1.00 39.8 19.2S6.004 50.00 6.71 43.116 0.242 0.0 0.0 0.0 1.00 70.7 32.8S6.005 50.00 7.04 42.991 0.267 0.0 0.0 0.0 1.00 70.8 36.2
S3.007 45.90 8.58 42.606 1.276 0.0 0.0 0.0 1.22 344.5 158.6S3.008 44.94 8.98 42.569 1.301 0.0 0.0 0.0 1.21 342.4 158.6
S1.006 44.59 9.13 42.497 2.169 0.0 0.0 0.0 1.22 345.4 261.9S1.007 37.76 12.77 42.469 2.169 0.0 0.0 0.0 0.26 112.7« 261.9S1.008 37.56 12.90 42.464 2.194 0.0 0.0 0.0 1.21 341.3 261.9
Betts Associates Ltd Page 2Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.009 19.905 0.066 300.0 0.025 0.00 0.0 0.600 o 375S1.010 29.494 0.098 301.0 0.000 0.00 0.0 0.600 o 375S1.011 12.510 0.042 300.0 0.000 0.00 0.0 0.600 o 375S1.012 6.031 0.025 241.2 0.000 0.00 0.0 0.032 |_| -1S1.013 4.585 0.019 241.3 0.000 0.00 76.4 0.032 |_| -1S1.014 73.636 0.580 127.0 0.000 0.00 0.0 0.600 o 600
S7.000 9.803 0.010 980.3 0.000 5.00 0.0 0.032 |_| -2S7.001 9.717 0.070 138.8 0.000 0.00 0.0 0.032 |_| -2S7.002 10.837 0.060 180.6 0.000 0.00 0.0 0.032 |_| -2
S1.015 5.117 0.012 426.4 0.000 0.00 0.0 0.032 |_| -2
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.009 37.10 13.22 42.440 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.010 36.44 13.69 42.374 2.219 0.0 0.0 0.0 1.04 114.8« 261.9S1.011 36.17 13.89 42.276 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.012 36.03 14.00 42.234 2.219 0.0 0.0 0.0 0.95 981.2 261.9S1.013 35.92 14.08 42.209 2.219 76.4 0.0 0.0 0.95 981.0 292.3S1.014 35.19 14.65 42.190 2.219 76.4 0.0 0.0 2.16 610.7 292.3
S7.000 50.00 5.28 41.720 0.000 0.0 0.0 0.0 0.58 1086.2 0.0S7.001 50.00 5.39 41.710 0.000 0.0 0.0 0.0 1.54 2886.6 0.0S7.002 50.00 5.52 41.640 0.000 0.0 0.0 0.0 1.35 2530.6 0.0
S1.015 35.07 14.75 41.580 2.219 76.4 0.0 0.0 0.88 1647.0 292.3
Betts Associates Ltd Page 3Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 2 0% 100/15 SummerS1.001 15 Winter 2 0% 30/15 SummerS1.002 15 Winter 2 0% 100/15 SummerS2.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 2 0% 30/15 SummerS2.003 15 Winter 2 0% 30/15 SummerS1.003 15 Winter 2 0% 30/15 SummerS1.004 15 Winter 2 0% 100/15 SummerS1.005 15 Winter 2 0% 30/15 WinterS3.000 15 Winter 2 0% 100/15 SummerS3.001 15 Winter 2 0% 30/15 WinterS4.000 15 Winter 2 0% 30/15 WinterS3.002 15 Winter 2 0% 30/15 SummerS3.003 15 Winter 2 0% 30/15 SummerS5.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 2 0% 30/15 SummerS3.005 15 Winter 2 0% 30/15 SummerS3.006 15 Winter 2 0% 30/15 SummerS6.000 15 Winter 2 0% 100/15 SummerS6.001 15 Winter 2 0% 100/15 Summer
Betts Associates Ltd Page 4Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 15 Winter 2 0% 30/15 WinterS6.003 15 Winter 2 0% 30/15 SummerS6.004 15 Winter 2 0% 30/15 SummerS6.005 15 Winter 2 0% 30/15 SummerS3.007 15 Winter 2 0% 30/15 SummerS3.008 15 Winter 2 0% 30/15 SummerS1.006 15 Winter 2 0% 30/15 SummerS1.007 30 Winter 2 0% 30/15 SummerS1.008 30 Winter 2 0% 30/15 SummerS1.009 360 Winter 2 0% 30/60 WinterS1.010 360 Winter 2 0%S1.011 360 Winter 2 0%S1.012 360 Winter 2 0%S1.013 360 Winter 2 0%S1.014 360 Winter 2 0%S7.000 60 Winter 2 0%S7.001 60 Winter 2 0%S7.002 360 Winter 2 0%S1.015 360 Winter 2 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.127 -0.079 0.000 0.44 0.0 7.5 OKS1.001 S2 44.594 -0.099 0.000 0.60 0.0 22.2 OKS1.002 S3 44.463 -0.132 0.000 0.36 0.0 25.5 OKS2.000 S4 44.799 -0.146 0.000 0.26 0.0 9.8 OKS2.001 S5 44.694 -0.069 0.000 0.79 0.0 30.2 OKS2.002 S6 44.330 -0.082 0.000 0.86 0.0 52.0 OKS2.003 S7 44.255 -0.089 0.000 0.83 0.0 54.1 OKS1.003 S8 44.089 -0.104 0.000 0.86 0.0 89.5 OKS1.004 S9 43.936 -0.190 0.000 0.48 0.0 92.1 OKS1.005 S10 43.368 -0.202 0.000 0.44 0.0 94.6 OKS3.000 S11 44.345 -0.120 0.000 0.43 0.0 23.9 OKS3.001 S12 43.798 -0.109 0.000 0.52 0.0 28.6 OKS4.000 S13 43.649 -0.114 0.000 0.48 0.0 17.7 OKS3.002 S14 43.390 -0.207 0.000 0.55 0.0 52.2 OKS3.003 S15 43.361 -0.213 0.000 0.41 0.0 57.0 OKS5.000 S16 43.584 -0.056 0.000 0.90 0.0 33.0 OKS3.004 S17 43.306 -0.189 0.000 0.61 0.0 86.9 OKS3.005 S18 43.206 -0.171 0.000 0.68 0.0 100.0 OKS3.006 S19 43.142 -0.094 0.000 0.47 0.0 94.0 OKS6.000 S20 43.662 -0.175 0.000 0.11 0.0 3.8 OKS6.001 S21 43.579 -0.157 0.000 0.20 0.0 7.1 OKS6.002 S22 43.496 -0.119 0.000 0.45 0.0 15.8 OKS6.003 S23 43.419 -0.108 0.000 0.52 0.0 18.8 OKS6.004 S24 43.265 -0.151 0.000 0.48 0.0 31.1 OKS6.005 S25 43.153 -0.138 0.000 0.55 0.0 33.6 OKS3.007 S26 43.128 -0.078 0.000 0.56 0.0 118.0 OK
Betts Associates Ltd Page 5Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.107 -0.062 0.000 0.43 0.0 119.2 OKS1.006 S28 43.082 -0.015 0.000 1.02 0.0 199.6 OKS1.007 S29 43.030 -0.189 0.000 0.58 0.0 194.1 OKS1.008 S30 42.973 -0.091 0.000 1.03 0.0 189.0 OKS1.009 S31 42.726 -0.089 0.000 0.27 0.0 25.7 OKS1.010 S32 42.516 -0.233 0.000 0.25 0.0 25.7 OKS1.011 S33 42.461 -0.190 0.000 0.29 0.0 25.8 OKS1.012 S34 42.446 -0.938 0.000 0.04 0.0 26.0 OKS1.013 S35 42.445 -0.914 0.000 0.15 0.0 102.2 OKS1.014 S36 42.389 -0.401 0.000 0.24 0.0 102.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.693 -0.577 0.000 0.00 0.0 0.4 OKS1.015 S40 41.693 -0.517 0.000 0.08 0.0 102.1 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 6Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 30 0% 100/15 SummerS1.001 15 Winter 30 0% 30/15 SummerS1.002 15 Winter 30 0% 100/15 SummerS2.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 30 0% 30/15 SummerS2.003 15 Winter 30 0% 30/15 SummerS1.003 15 Winter 30 0% 30/15 SummerS1.004 15 Winter 30 0% 100/15 SummerS1.005 15 Winter 30 0% 30/15 WinterS3.000 15 Winter 30 0% 100/15 SummerS3.001 15 Winter 30 0% 30/15 WinterS4.000 15 Winter 30 0% 30/15 WinterS3.002 15 Winter 30 0% 30/15 SummerS3.003 15 Winter 30 0% 30/15 SummerS5.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S3.004 15 Winter 30 0% 30/15 SummerS3.005 15 Winter 30 0% 30/15 SummerS3.006 15 Winter 30 0% 30/15 SummerS6.000 15 Winter 30 0% 100/15 SummerS6.001 30 Winter 30 0% 100/15 Summer
Betts Associates Ltd Page 7Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 30 0% 30/15 WinterS6.003 30 Winter 30 0% 30/15 SummerS6.004 15 Winter 30 0% 30/15 SummerS6.005 15 Winter 30 0% 30/15 SummerS3.007 15 Winter 30 0% 30/15 SummerS3.008 15 Winter 30 0% 30/15 SummerS1.006 15 Winter 30 0% 30/15 SummerS1.007 15 Winter 30 0% 30/15 SummerS1.008 30 Winter 30 0% 30/15 SummerS1.009 360 Winter 30 0% 30/60 WinterS1.010 360 Winter 30 0%S1.011 360 Winter 30 0%S1.012 360 Winter 30 0%S1.013 360 Winter 30 0%S1.014 360 Winter 30 0%S7.000 60 Winter 30 0%S7.001 60 Winter 30 0%S7.002 240 Winter 30 0%S1.015 240 Winter 30 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.164 -0.042 0.000 0.82 0.0 14.3 OKS1.001 S2 44.754 0.061 0.000 1.27 0.0 47.3 SURCHARGEDS1.002 S3 44.529 -0.065 0.000 0.76 0.0 54.3 OKS2.000 S4 45.454 0.509 0.000 0.49 0.0 18.3 SURCHARGEDS2.001 S5 45.421 0.658 0.000 1.31 0.0 50.1 SURCHARGEDS2.002 S6 44.808 0.396 0.000 1.50 0.0 90.3 SURCHARGEDS2.003 S7 44.644 0.300 0.000 1.46 0.0 95.4 SURCHARGEDS1.003 S8 44.305 0.112 0.000 1.64 0.0 170.2 SURCHARGEDS1.004 S9 44.039 -0.087 0.000 0.92 0.0 175.5 OKS1.005 S10 43.668 0.098 0.000 0.78 0.0 168.0 SURCHARGEDS3.000 S11 44.398 -0.067 0.000 0.82 0.0 45.2 OKS3.001 S12 43.927 0.020 0.000 0.99 0.0 54.1 SURCHARGEDS4.000 S13 43.819 0.056 0.000 0.89 0.0 32.7 SURCHARGEDS3.002 S14 43.772 0.175 0.000 0.98 0.0 92.6 SURCHARGEDS3.003 S15 43.756 0.182 0.000 0.70 0.0 96.9 SURCHARGEDS5.000 S16 43.925 0.285 0.000 1.61 0.0 59.1 SURCHARGEDS3.004 S17 43.724 0.229 0.000 0.95 0.0 134.4 SURCHARGEDS3.005 S18 43.646 0.269 0.000 1.01 0.0 149.2 SURCHARGEDS3.006 S19 43.513 0.277 0.000 0.85 0.0 169.3 SURCHARGEDS6.000 S20 43.682 -0.155 0.000 0.20 0.0 7.2 OKS6.001 S21 43.658 -0.078 0.000 0.34 0.0 12.1 OKS6.002 S22 43.642 0.027 0.000 0.81 0.0 28.2 SURCHARGEDS6.003 S23 43.609 0.082 0.000 0.92 0.0 32.9 SURCHARGEDS6.004 S24 43.568 0.152 0.000 0.96 0.0 62.0 SURCHARGEDS6.005 S25 43.527 0.236 0.000 1.00 0.0 61.6 SURCHARGEDS3.007 S26 43.487 0.281 0.000 1.03 0.0 215.8 SURCHARGED
Betts Associates Ltd Page 8Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.449 0.280 0.000 0.77 0.0 214.8 SURCHARGEDS1.006 S28 43.402 0.305 0.000 1.97 0.0 385.8 SURCHARGEDS1.007 S29 43.251 0.032 0.000 1.11 0.0 370.4 SURCHARGEDS1.008 S30 43.146 0.082 0.000 2.01 0.0 368.1 SURCHARGEDS1.009 S31 42.964 0.149 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.396 -0.394 0.000 0.26 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.699 -0.571 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.5 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 9Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 100 +30% 100/15 SummerS1.001 15 Winter 100 +30% 30/15 SummerS1.002 15 Winter 100 +30% 100/15 SummerS2.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 100 +30% 30/15 SummerS2.003 15 Winter 100 +30% 30/15 SummerS1.003 15 Winter 100 +30% 30/15 SummerS1.004 15 Winter 100 +30% 100/15 SummerS1.005 30 Winter 100 +30% 30/15 WinterS3.000 15 Winter 100 +30% 100/15 SummerS3.001 15 Winter 100 +30% 30/15 WinterS4.000 15 Winter 100 +30% 30/15 WinterS3.002 30 Winter 100 +30% 30/15 SummerS3.003 30 Winter 100 +30% 30/15 SummerS5.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S3.004 30 Winter 100 +30% 30/15 SummerS3.005 30 Winter 100 +30% 30/15 SummerS3.006 30 Winter 100 +30% 30/15 SummerS6.000 30 Winter 100 +30% 100/15 SummerS6.001 30 Winter 100 +30% 100/15 Summer
Betts Associates Ltd Page 10Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 30 Winter 100 +30% 30/15 WinterS6.003 30 Winter 100 +30% 30/15 SummerS6.004 30 Winter 100 +30% 30/15 SummerS6.005 30 Winter 100 +30% 30/15 SummerS3.007 30 Winter 100 +30% 30/15 SummerS3.008 30 Winter 100 +30% 30/15 SummerS1.006 30 Winter 100 +30% 30/15 SummerS1.007 30 Winter 100 +30% 30/15 SummerS1.008 360 Winter 100 +30% 30/15 SummerS1.009 360 Winter 100 +30% 30/60 WinterS1.010 1440 Winter 100 +30%S1.011 1440 Summer 100 +30%S1.012 1440 Summer 100 +30%S1.013 1440 Summer 100 +30%S1.014 1440 Winter 100 +30%S7.000 60 Winter 100 +30%S7.001 60 Winter 100 +30%S7.002 1440 Summer 100 +30%S1.015 1440 Summer 100 +30%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 46.136 0.930 0.000 1.01 0.0 17.6 FLOOD RISKS1.001 S2 45.731 1.039 0.000 1.54 0.0 57.2 SURCHARGEDS1.002 S3 45.557 0.963 0.000 0.89 0.0 63.3 SURCHARGEDS2.000 S4 46.282 1.337 10.017 1.49 0.0 55.6 FLOODS2.001 S5 46.355 1.592 2.080 1.68 0.0 64.5 FLOODS2.002 S6 46.021 1.609 0.000 2.05 0.0 123.5 SURCHARGEDS2.003 S7 45.774 1.430 0.000 1.91 0.0 124.7 SURCHARGEDS1.003 S8 45.303 1.110 0.000 2.11 0.0 218.7 SURCHARGEDS1.004 S9 45.020 0.894 0.000 1.16 0.0 219.5 SURCHARGEDS1.005 S10 44.301 0.731 0.000 0.99 0.0 214.0 SURCHARGEDS3.000 S11 45.505 1.040 0.000 1.03 0.0 57.2 FLOOD RISKS3.001 S12 44.997 1.090 0.000 1.10 0.0 60.3 FLOOD RISKS4.000 S13 44.799 1.036 0.000 1.12 0.0 41.6 FLOOD RISKS3.002 S14 44.657 1.060 0.000 1.08 0.0 102.2 FLOOD RISKS3.003 S15 44.633 1.059 0.000 0.82 0.0 114.1 FLOOD RISKS5.000 S16 44.956 1.316 1.858 2.03 0.0 74.2 FLOODS3.004 S17 44.580 1.085 0.000 1.27 0.0 180.4 SURCHARGEDS3.005 S18 44.392 1.015 0.000 1.50 0.0 220.7 SURCHARGEDS3.006 S19 44.070 0.834 0.000 1.33 0.0 264.7 SURCHARGEDS6.000 S20 44.478 0.641 0.000 0.22 0.0 7.9 FLOOD RISKS6.001 S21 44.464 0.728 0.000 0.40 0.0 14.4 SURCHARGEDS6.002 S22 44.437 0.822 0.000 0.88 0.0 30.7 SURCHARGEDS6.003 S23 44.369 0.842 0.000 1.03 0.0 37.0 SURCHARGEDS6.004 S24 44.253 0.837 0.000 1.03 0.0 66.6 SURCHARGEDS6.005 S25 44.133 0.842 0.000 1.18 0.0 72.4 SURCHARGEDS3.007 S26 44.029 0.823 0.000 1.62 0.0 341.2 SURCHARGED
Betts Associates Ltd Page 11Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:45 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 43.955 0.786 0.000 1.25 0.0 345.6 SURCHARGEDS1.006 S28 43.843 0.746 0.000 2.98 0.0 581.3 SURCHARGEDS1.007 S29 43.508 0.289 0.000 1.72 0.0 570.9 FLOOD RISKS1.008 S30 43.424 0.360 0.000 0.95 0.0 174.3 SURCHARGEDS1.009 S31 43.420 0.605 0.000 0.34 0.0 32.7 SURCHARGEDS1.010 S32 42.534 -0.215 0.000 0.32 0.0 32.7 OKS1.011 S33 42.477 -0.174 0.000 0.37 0.0 32.7 OKS1.012 S34 42.459 -0.925 0.000 0.05 0.0 32.7 OKS1.013 S35 42.457 -0.902 0.000 0.16 0.0 109.1 OKS1.014 S36 42.396 -0.394 0.000 0.26 0.0 109.1 OKS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.699 -0.571 0.000 0.00 0.0 0.4 OKS1.015 S40 41.699 -0.511 0.000 0.08 0.0 109.6 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
DWH133 – Development off Mitton Road, Whalley
Surface Water Drainage Simulation Output
Existing Culvert 100% Sedimentation Depth
April 2016
Betts Associates Ltd Page 0Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
« - Indicates pipe capacity < flow
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.000 51.353 0.514 100.0 0.050 5.00 0.0 0.600 o 150S1.001 14.751 0.098 150.0 0.112 0.00 0.0 0.600 o 225S1.002 17.206 0.401 42.9 0.025 0.00 0.0 0.600 o 225
S2.000 30.887 0.182 169.7 0.064 5.00 0.0 0.600 o 225S2.001 59.656 0.351 170.0 0.165 0.00 0.0 0.600 o 225S2.002 16.642 0.068 244.7 0.179 0.00 0.0 0.600 o 300S2.003 36.923 0.151 244.5 0.025 0.00 0.0 0.600 o 300
S1.003 16.285 0.067 243.1 0.105 0.00 0.0 0.600 o 375S1.004 53.260 0.556 95.8 0.025 0.00 0.0 0.600 o 375S1.005 32.531 0.473 68.8 0.025 0.00 0.0 0.600 o 375
S3.000 44.740 0.558 80.2 0.156 5.00 0.0 0.600 o 225S3.001 23.497 0.310 75.8 0.035 0.00 0.0 0.600 o 225
S4.000 28.283 0.166 170.4 0.114 5.00 0.0 0.600 o 225
S3.002 9.228 0.023 401.2 0.047 0.00 0.0 0.600 o 450
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.000 50.00 5.85 45.056 0.050 0.0 0.0 0.0 1.00 17.8 6.8S1.001 50.00 6.08 44.467 0.162 0.0 0.0 0.0 1.07 42.4 21.9S1.002 50.00 6.23 44.369 0.187 0.0 0.0 0.0 2.00 79.6 25.3
S2.000 50.00 5.51 44.720 0.064 0.0 0.0 0.0 1.00 39.8 8.7S2.001 50.00 6.51 44.538 0.229 0.0 0.0 0.0 1.00 39.8 31.0S2.002 50.00 6.79 44.112 0.408 0.0 0.0 0.0 1.00 70.7 55.2S2.003 49.08 7.40 44.044 0.433 0.0 0.0 0.0 1.00 70.8 57.6
S1.003 48.41 7.64 43.818 0.725 0.0 0.0 0.0 1.16 127.9 95.1S1.004 47.10 8.11 43.751 0.750 0.0 0.0 0.0 1.85 204.5 95.7S1.005 46.45 8.36 43.195 0.775 0.0 0.0 0.0 2.19 241.6 97.5
S3.000 50.00 5.51 44.240 0.156 0.0 0.0 0.0 1.46 58.1 21.1S3.001 50.00 5.77 43.682 0.191 0.0 0.0 0.0 1.50 59.8 25.9
S4.000 50.00 5.47 43.538 0.114 0.0 0.0 0.0 1.00 39.7 15.4
S3.002 50.00 5.92 43.147 0.352 0.0 0.0 0.0 1.01 160.4 47.7
Betts Associates Ltd Page 1Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S3.003 31.828 0.079 402.9 0.050 0.00 0.0 0.600 o 450
S5.000 24.668 0.145 170.1 0.214 5.00 0.0 0.600 o 225
S3.004 49.688 0.118 421.1 0.025 0.00 0.0 0.600 o 450S3.005 56.326 0.141 399.5 0.171 0.00 0.0 0.600 o 450S3.006 11.861 0.030 395.4 0.172 0.00 0.0 0.600 o 600
S6.000 17.226 0.101 170.6 0.025 5.00 0.0 0.600 o 225S6.001 20.616 0.121 170.4 0.025 0.00 0.0 0.600 o 225S6.002 14.998 0.088 170.4 0.067 0.00 0.0 0.600 o 225S6.003 18.820 0.111 169.5 0.025 0.00 0.0 0.600 o 225S6.004 30.619 0.125 245.0 0.100 0.00 0.0 0.600 o 300S6.005 19.803 0.081 244.5 0.025 0.00 0.0 0.600 o 300
S3.007 14.635 0.037 395.5 0.025 0.00 0.0 0.600 o 600S3.008 28.820 0.072 400.3 0.025 0.00 0.0 0.600 o 600
S1.006 11.015 0.028 393.4 0.093 0.00 0.0 0.600 o 600S1.007 55.720 0.005 11144.0 0.000 0.00 0.0 0.600 o 750S1.008 9.667 0.024 402.8 0.025 0.00 0.0 0.600 o 600
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S3.003 50.00 6.45 43.124 0.402 0.0 0.0 0.0 1.01 160.1 54.4
S5.000 50.00 5.41 43.415 0.214 0.0 0.0 0.0 1.00 39.7 29.0
S3.004 49.41 7.29 43.045 0.641 0.0 0.0 0.0 0.98 156.6 85.8S3.005 46.82 8.22 42.927 0.812 0.0 0.0 0.0 1.01 160.8 103.0S3.006 46.40 8.38 42.636 0.984 0.0 0.0 0.0 1.22 344.5 123.7
S6.000 50.00 5.29 43.612 0.025 0.0 0.0 0.0 1.00 39.7 3.4S6.001 50.00 5.63 43.511 0.050 0.0 0.0 0.0 1.00 39.7 6.8S6.002 50.00 5.88 43.390 0.117 0.0 0.0 0.0 1.00 39.7 15.8S6.003 50.00 6.20 43.302 0.142 0.0 0.0 0.0 1.00 39.8 19.2S6.004 50.00 6.71 43.116 0.242 0.0 0.0 0.0 1.00 70.7 32.8S6.005 50.00 7.04 42.991 0.267 0.0 0.0 0.0 1.00 70.8 36.2
S3.007 45.90 8.58 42.606 1.276 0.0 0.0 0.0 1.22 344.5 158.6S3.008 44.94 8.98 42.569 1.301 0.0 0.0 0.0 1.21 342.4 158.6
S1.006 44.59 9.13 42.497 2.169 0.0 0.0 0.0 1.22 345.4 261.9S1.007 37.76 12.77 42.469 2.169 0.0 0.0 0.0 0.26 112.7« 261.9S1.008 37.56 12.90 42.464 2.194 0.0 0.0 0.0 1.21 341.3 261.9
Betts Associates Ltd Page 2Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
STORM SEWER DESIGN by the Modified Rational Method
Network Design Table for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
PN Length(m)
Fall(m)
Slope(1:X)
I.Area(ha)
T.E.(mins)
BaseFlow (l/s)
k(mm)
n HYDSECT
DIA(mm)
AutoDesign
S1.009 19.905 0.066 300.0 0.025 0.00 0.0 0.600 o 375S1.010 29.494 0.098 301.0 0.000 0.00 0.0 0.600 o 375S1.011 12.510 0.042 300.0 0.000 0.00 0.0 0.600 o 375S1.012 6.031 0.025 241.2 0.000 0.00 0.0 0.032 |_| -1S1.013 4.585 0.019 241.3 0.000 0.00 76.4 0.032 |_| -1S1.014 73.636 0.580 127.0 0.000 0.00 0.0 0.600 o 600
S7.000 9.803 0.010 980.3 0.000 5.00 0.0 0.032 |_| -2S7.001 9.717 0.070 138.8 0.000 0.00 0.0 0.032 |_| -2S7.002 10.837 0.060 180.6 0.000 0.00 0.0 0.032 |_| -2
S1.015 5.117 0.012 426.4 0.000 0.00 0.0 0.032 |_| -2
Network Results Table
PN Rain(mm/hr)
T.C.(mins)
US/IL(m)
Σ I.Area(ha)
Σ BaseFlow (l/s)
Foul(l/s)
Add Flow(l/s)
Vel(m/s)
Cap(l/s)
Flow(l/s)
S1.009 37.10 13.22 42.440 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.010 36.44 13.69 42.374 2.219 0.0 0.0 0.0 1.04 114.8« 261.9S1.011 36.17 13.89 42.276 2.219 0.0 0.0 0.0 1.04 115.0« 261.9S1.012 36.03 14.00 42.234 2.219 0.0 0.0 0.0 0.95 981.2 261.9S1.013 35.92 14.08 42.209 2.219 76.4 0.0 0.0 0.95 981.0 292.3S1.014 35.19 14.65 42.190 2.219 76.4 0.0 0.0 2.16 610.7 292.3
S7.000 50.00 5.28 41.720 0.000 0.0 0.0 0.0 0.58 1086.2 0.0S7.001 50.00 5.39 41.710 0.000 0.0 0.0 0.0 1.54 2886.6 0.0S7.002 50.00 5.52 41.640 0.000 0.0 0.0 0.0 1.35 2530.6 0.0
S1.015 35.07 14.75 41.580 2.219 76.4 0.0 0.0 0.88 1647.0 292.3
Betts Associates Ltd Page 3Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 2 0% 100/15 SummerS1.001 1440 Winter 2 0% 2/1440 SummerS1.002 1440 Winter 2 0% 2/1440 SummerS2.000 15 Winter 2 0% 30/15 Summer 100/15 Summer 5S2.001 1440 Winter 2 0% 30/15 Summer 100/15 Summer 4S2.002 1440 Winter 2 0% 2/960 WinterS2.003 1440 Winter 2 0% 2/960 SummerS1.003 1440 Winter 2 0% 2/960 SummerS1.004 1440 Winter 2 0% 2/960 SummerS1.005 1440 Winter 2 0% 2/360 SummerS3.000 1440 Winter 2 0% 2/1440 SummerS3.001 1440 Winter 2 0% 2/480 SummerS4.000 1440 Winter 2 0% 2/360 SummerS3.002 1440 Winter 2 0% 2/360 SummerS3.003 1440 Winter 2 0% 2/360 Summer 2/1440 Summer 6S5.000 1440 Winter 2 0% 2/360 Summer 100/15 Summer 4S3.004 1440 Winter 2 0% 2/240 SummerS3.005 1440 Winter 2 0% 2/240 Summer 100/1440 Winter 1S3.006 1440 Winter 2 0% 2/240 Summer 2/1440 Summer 6S6.000 1440 Winter 2 0% 2/480 Summer 2/1440 Summer 6S6.001 1440 Winter 2 0% 2/360 Summer
Betts Associates Ltd Page 4Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 1440 Winter 2 0% 2/360 SummerS6.003 1440 Winter 2 0% 2/240 Summer 30/1440 Winter 3S6.004 1440 Winter 2 0% 2/240 Summer 2/1440 Summer 6S6.005 1440 Winter 2 0% 2/240 Summer 2/1440 Summer 6S3.007 1440 Winter 2 0% 2/240 Summer 2/1440 Summer 8S3.008 1440 Winter 2 0% 2/240 Summer 2/960 Summer 12S1.006 1440 Winter 2 0% 2/120 Summer 2/1440 Summer 6S1.007 1440 Winter 2 0% 2/240 Summer 2/360 Summer 26S1.008 1440 Winter 2 0% 2/120 Summer 2/360 Summer 26S1.009 1440 Winter 2 0% 2/60 Summer 2/960 Summer 12S1.010 1440 Winter 2 0% 2/15 Summer 2/480 Summer 22S1.011 1440 Winter 2 0% 2/15 Summer 2/360 Summer 27S1.012 1440 Winter 2 0% 2/15 Summer 2/15 Summer 54S1.013 1440 Winter 2 0% 2/15 Summer 2/15 Summer 54S1.014 1440 Winter 2 0% 2/15 Summer 2/15 Summer 54S7.000 60 Winter 2 0%S7.001 60 Winter 2 0%S7.002 60 Winter 2 0%S1.015 1440 Winter 2 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.127 -0.079 0.000 0.44 0.0 7.5 OKS1.001 S2 44.735 0.042 0.000 0.05 0.0 1.9 SURCHARGEDS1.002 S3 44.735 0.141 0.000 0.03 0.0 2.2 SURCHARGEDS2.000 S4 44.799 -0.146 0.000 0.26 0.0 9.8 OKS2.001 S5 44.734 -0.029 0.000 0.07 0.0 2.7 OKS2.002 S6 44.735 0.323 0.000 0.08 0.0 4.7 SURCHARGEDS2.003 S7 44.735 0.391 0.000 0.08 0.0 5.0 SURCHARGEDS1.003 S8 44.735 0.542 0.000 0.08 0.0 8.4 SURCHARGEDS1.004 S9 44.735 0.609 0.000 0.05 0.0 8.7 SURCHARGEDS1.005 S10 44.736 1.166 0.000 0.04 0.0 8.8 FLOOD RISKS3.000 S11 44.708 0.243 0.000 0.03 0.0 1.8 SURCHARGEDS3.001 S12 44.709 0.802 0.000 0.04 0.0 2.2 SURCHARGEDS4.000 S13 44.709 0.946 0.000 0.03 0.0 1.3 FLOOD RISKS3.002 S14 44.709 1.112 0.000 0.04 0.0 3.9 FLOOD RISKS3.003 S15 44.709 1.135 19.001 0.03 0.0 4.5 FLOODS5.000 S16 44.712 1.072 0.000 0.07 0.0 2.4 FLOOD RISKS3.004 S17 44.712 1.217 0.000 0.05 0.0 7.1 FLOOD RISKS3.005 S18 44.715 1.338 0.000 0.06 0.0 9.1 FLOOD RISKS3.006 S19 44.719 1.483 98.190 0.06 0.0 11.0 FLOODS6.000 S20 44.685 0.848 6.044 0.01 0.0 0.3 FLOODS6.001 S21 44.689 0.953 0.000 0.01 0.0 0.5 FLOOD RISKS6.002 S22 44.693 1.078 0.000 0.04 0.0 1.3 FLOOD RISKS6.003 S23 44.696 1.169 0.000 0.04 0.0 1.5 FLOOD RISKS6.004 S24 44.700 1.284 19.431 0.04 0.0 2.7 FLOODS6.005 S25 44.709 1.418 21.730 0.05 0.0 2.9 FLOODS3.007 S26 44.721 1.515 210.946 0.07 0.0 14.1 FLOOD
Betts Associates Ltd Page 5Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
2 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 44.727 1.558 329.146 0.05 0.0 14.4 FLOODS1.006 S28 44.736 1.639 137.952 0.12 0.0 24.2 FLOODS1.007 S29 44.743 1.524 956.253 0.06 0.0 21.0 FLOODS1.008 S30 44.753 1.689 966.135 0.12 0.0 21.2 FLOODS1.009 S31 44.762 1.947 604.288 0.00 0.0 0.0 FLOODS1.010 S32 45.157 2.408 1134.061 0.00 0.0 0.0 FLOODS1.011 S33 45.215 2.564 1319.494 -0.05 0.0 -4.4 FLOODS1.012 S34 45.263 1.879 1962.692 -0.02 0.0 -12.4 FLOODS1.013 S35 45.269 1.910 1798.800 0.04 0.0 29.1 FLOODS1.014 S36 45.268 2.478 1718.491 2.31 0.0 4.0 FLOODS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.640 -0.630 0.000 0.00 0.0 0.0 OKS1.015 S40 41.631 -0.579 0.000 0.00 0.0 4.0 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 6Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 30 0% 100/15 SummerS1.001 1440 Winter 30 0% 2/1440 SummerS1.002 1440 Winter 30 0% 2/1440 SummerS2.000 15 Winter 30 0% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 30 0% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 30 0% 2/960 WinterS2.003 1440 Winter 30 0% 2/960 SummerS1.003 1440 Winter 30 0% 2/960 SummerS1.004 1440 Winter 30 0% 2/960 SummerS1.005 1440 Winter 30 0% 2/360 SummerS3.000 1440 Winter 30 0% 2/1440 SummerS3.001 1440 Winter 30 0% 2/480 SummerS4.000 1440 Winter 30 0% 2/360 SummerS3.002 1440 Winter 30 0% 2/360 SummerS3.003 1440 Winter 30 0% 2/360 Summer 2/1440 Summer 6S5.000 1440 Winter 30 0% 2/360 Summer 100/15 Summer 4S3.004 1440 Winter 30 0% 2/240 SummerS3.005 1440 Winter 30 0% 2/240 Summer 100/1440 Winter 1S3.006 1440 Winter 30 0% 2/240 Summer 2/1440 Summer 6S6.000 1440 Winter 30 0% 2/480 Summer 2/1440 Summer 6S6.001 1440 Winter 30 0% 2/360 Summer
Betts Associates Ltd Page 7Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 1440 Winter 30 0% 2/360 SummerS6.003 1440 Winter 30 0% 2/240 Summer 30/1440 Winter 3S6.004 1440 Winter 30 0% 2/240 Summer 2/1440 Summer 6S6.005 1440 Winter 30 0% 2/240 Summer 2/1440 Summer 6S3.007 1440 Winter 30 0% 2/240 Summer 2/1440 Summer 8S3.008 1440 Winter 30 0% 2/240 Summer 2/960 Summer 12S1.006 1440 Winter 30 0% 2/120 Summer 2/1440 Summer 6S1.007 1440 Winter 30 0% 2/240 Summer 2/360 Summer 26S1.008 1440 Winter 30 0% 2/120 Summer 2/360 Summer 26S1.009 1440 Winter 30 0% 2/60 Summer 2/960 Summer 12S1.010 1440 Winter 30 0% 2/15 Summer 2/480 Summer 22S1.011 1440 Winter 30 0% 2/15 Summer 2/360 Summer 27S1.012 1440 Winter 30 0% 2/15 Summer 2/15 Summer 54S1.013 1440 Winter 30 0% 2/15 Summer 2/15 Summer 54S1.014 1440 Winter 30 0% 2/15 Summer 2/15 Summer 54S7.000 60 Winter 30 0%S7.001 60 Winter 30 0%S7.002 60 Winter 30 0%S1.015 1440 Winter 30 0%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 45.164 -0.042 0.000 0.82 0.0 14.3 OKS1.001 S2 44.761 0.069 0.000 0.08 0.0 3.1 SURCHARGEDS1.002 S3 44.762 0.168 0.000 0.05 0.0 3.6 SURCHARGEDS2.000 S4 45.454 0.509 0.000 0.49 0.0 18.3 SURCHARGEDS2.001 S5 45.421 0.658 0.000 1.31 0.0 50.1 SURCHARGEDS2.002 S6 44.808 0.396 0.000 1.50 0.0 90.3 SURCHARGEDS2.003 S7 44.762 0.418 0.000 0.13 0.0 8.4 SURCHARGEDS1.003 S8 44.762 0.569 0.000 0.13 0.0 13.9 SURCHARGEDS1.004 S9 44.763 0.637 0.000 0.08 0.0 14.3 SURCHARGEDS1.005 S10 44.763 1.193 0.000 0.07 0.0 14.6 FLOOD RISKS3.000 S11 44.734 0.269 0.000 0.05 0.0 3.0 SURCHARGEDS3.001 S12 44.734 0.827 0.000 0.07 0.0 3.6 SURCHARGEDS4.000 S13 44.734 0.971 0.000 0.06 0.0 2.1 FLOOD RISKS3.002 S14 44.734 1.137 0.000 0.07 0.0 6.6 FLOOD RISKS3.003 S15 44.734 1.160 44.191 0.05 0.0 7.5 FLOODS5.000 S16 44.737 1.097 0.000 0.11 0.0 4.0 FLOOD RISKS3.004 S17 44.737 1.242 0.000 0.08 0.0 12.0 FLOOD RISKS3.005 S18 44.741 1.364 0.000 0.10 0.0 15.2 FLOOD RISKS3.006 S19 44.745 1.509 124.055 0.09 0.0 18.4 FLOODS6.000 S20 44.696 0.859 17.350 0.01 0.0 0.4 FLOODS6.001 S21 44.702 0.966 0.000 0.02 0.0 0.9 FLOOD RISKS6.002 S22 44.708 1.093 0.000 0.06 0.0 2.1 FLOOD RISKS6.003 S23 44.713 1.186 0.648 0.07 0.0 2.6 FLOODS6.004 S24 44.721 1.305 40.468 0.07 0.0 4.5 FLOODS6.005 S25 44.732 1.441 45.410 0.08 0.0 4.9 FLOODS3.007 S26 44.747 1.541 236.865 0.11 0.0 23.7 FLOOD
Betts Associates Ltd Page 8Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
30 year Return Period Summary of Critical Results by Maximum Level (Rank 1)for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 44.753 1.584 355.502 0.09 0.0 24.2 FLOODS1.006 S28 44.763 1.666 164.838 0.21 0.0 40.5 FLOODS1.007 S29 44.770 1.551 983.425 0.09 0.0 31.1 FLOODS1.008 S30 44.781 1.717 993.552 0.17 0.0 31.3 FLOODS1.009 S31 44.790 1.975 634.570 0.00 0.0 0.0 FLOODS1.010 S32 45.218 2.469 1194.978 0.00 0.0 0.0 FLOODS1.011 S33 45.276 2.625 1380.462 -0.05 0.0 -4.4 FLOODS1.012 S34 45.324 1.940 2023.687 -0.02 0.0 -17.6 FLOODS1.013 S35 45.330 1.971 1859.795 0.04 0.0 29.1 FLOODS1.014 S36 45.329 2.539 1779.486 2.33 0.0 4.1 FLOODS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.640 -0.630 0.000 0.00 0.0 0.0 OKS1.015 S40 41.631 -0.579 0.000 0.00 0.0 4.1 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
Betts Associates Ltd Page 9Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
Simulation CriteriaAreal Reduction Factor 1.000 Additional Flow - % of Total Flow 0.000
Hot Start (mins) 0 MADD Factor * 10m³/ha Storage 2.000Hot Start Level (mm) 0 Inlet Coeffiecient 0.800
Manhole Headloss Coeff (Global) 0.500 Flow per Person per Day (l/per/day) 0.000Foul Sewage per hectare (l/s) 0.000
Number of Input Hydrographs 0 Number of Storage Structures 1Number of Online Controls 1 Number of Time/Area Diagrams 0Number of Offline Controls 0 Number of Real Time Controls 0
Synthetic Rainfall DetailsRainfall Model FSR Ratio R 0.295
Region England and Wales Cv (Summer) 0.750M5-60 (mm) 19.200 Cv (Winter) 0.840
Margin for Flood Risk Warning (mm) 300.0Analysis Timestep 2.5 Second Increment (Extended)
DTS Status ONDVD Status OFF
Inertia Status OFF
Profile(s) Summer and WinterDuration(s) (mins) 15, 30, 60, 120, 240, 360, 480, 960, 1440
Return Period(s) (years) 2, 30, 100Climate Change (%) 0, 0, 30
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
S1.000 15 Winter 100 +30% 100/15 SummerS1.001 15 Winter 100 +30% 2/1440 SummerS1.002 15 Winter 100 +30% 2/1440 SummerS2.000 15 Winter 100 +30% 30/15 Summer 100/15 Summer 5S2.001 15 Winter 100 +30% 30/15 Summer 100/15 Summer 4S2.002 15 Winter 100 +30% 2/960 WinterS2.003 15 Winter 100 +30% 2/960 SummerS1.003 15 Winter 100 +30% 2/960 SummerS1.004 15 Winter 100 +30% 2/960 SummerS1.005 1440 Winter 100 +30% 2/360 SummerS3.000 15 Winter 100 +30% 2/1440 SummerS3.001 15 Winter 100 +30% 2/480 SummerS4.000 15 Winter 100 +30% 2/360 SummerS3.002 1440 Winter 100 +30% 2/360 SummerS3.003 1440 Winter 100 +30% 2/360 Summer 2/1440 Summer 6S5.000 15 Winter 100 +30% 2/360 Summer 100/15 Summer 4S3.004 1440 Winter 100 +30% 2/240 SummerS3.005 1440 Winter 100 +30% 2/240 Summer 100/1440 Winter 1S3.006 1440 Winter 100 +30% 2/240 Summer 2/1440 Summer 6S6.000 1440 Winter 100 +30% 2/480 Summer 2/1440 Summer 6S6.001 1440 Winter 100 +30% 2/360 Summer
Betts Associates Ltd Page 10Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S6.002 1440 Winter 100 +30% 2/360 SummerS6.003 1440 Winter 100 +30% 2/240 Summer 30/1440 Winter 3S6.004 1440 Winter 100 +30% 2/240 Summer 2/1440 Summer 6S6.005 1440 Winter 100 +30% 2/240 Summer 2/1440 Summer 6S3.007 1440 Winter 100 +30% 2/240 Summer 2/1440 Summer 8S3.008 1440 Winter 100 +30% 2/240 Summer 2/960 Summer 12S1.006 1440 Winter 100 +30% 2/120 Summer 2/1440 Summer 6S1.007 1440 Winter 100 +30% 2/240 Summer 2/360 Summer 26S1.008 1440 Winter 100 +30% 2/120 Summer 2/360 Summer 26S1.009 1440 Winter 100 +30% 2/60 Summer 2/960 Summer 12S1.010 1440 Winter 100 +30% 2/15 Summer 2/480 Summer 22S1.011 1440 Winter 100 +30% 2/15 Summer 2/360 Summer 27S1.012 1440 Winter 100 +30% 2/15 Summer 2/15 Summer 54S1.013 1440 Winter 100 +30% 2/15 Summer 2/15 Summer 54S1.014 1440 Winter 100 +30% 2/15 Summer 2/15 Summer 54S7.000 60 Winter 100 +30%S7.001 60 Winter 100 +30%S7.002 60 Winter 100 +30%S1.015 1440 Winter 100 +30%
PN StormReturnPeriod
ClimateChange
First XSurcharge
First YFlood
First ZOverflow
O/FAct.
LvlExc.
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
S1.000 S1 46.136 0.930 0.000 1.01 0.0 17.6 FLOOD RISKS1.001 S2 45.731 1.039 0.000 1.54 0.0 57.2 SURCHARGEDS1.002 S3 45.557 0.963 0.000 0.89 0.0 63.3 SURCHARGEDS2.000 S4 46.282 1.337 10.017 1.49 0.0 55.6 FLOODS2.001 S5 46.355 1.592 2.080 1.68 0.0 64.5 FLOODS2.002 S6 46.021 1.609 0.000 2.05 0.0 123.5 SURCHARGEDS2.003 S7 45.774 1.430 0.000 1.91 0.0 124.7 SURCHARGEDS1.003 S8 45.303 1.110 0.000 2.11 0.0 218.7 SURCHARGEDS1.004 S9 45.020 0.894 0.000 1.16 0.0 219.5 SURCHARGEDS1.005 S10 44.803 1.233 0.000 0.11 0.0 23.8 FLOOD RISKS3.000 S11 45.505 1.040 0.000 1.03 0.0 57.2 FLOOD RISKS3.001 S12 44.997 1.090 0.000 1.10 0.0 60.3 FLOOD RISKS4.000 S13 44.799 1.036 0.000 1.12 0.0 41.6 FLOOD RISKS3.002 S14 44.772 1.175 0.000 0.11 0.0 10.7 FLOOD RISKS3.003 S15 44.772 1.198 82.363 0.09 0.0 12.2 FLOODS5.000 S16 44.956 1.316 1.858 2.03 0.0 74.2 FLOODS3.004 S17 44.775 1.280 0.000 0.14 0.0 19.5 FLOOD RISKS3.005 S18 44.777 1.400 7.445 0.17 0.0 24.8 FLOODS3.006 S19 44.783 1.547 162.450 0.15 0.0 30.0 FLOODS6.000 S20 44.717 0.880 38.415 0.02 0.0 0.7 FLOODS6.001 S21 44.724 0.988 0.000 0.04 0.0 1.5 FLOOD RISKS6.002 S22 44.731 1.116 0.000 0.10 0.0 3.5 FLOOD RISKS6.003 S23 44.737 1.210 25.354 0.12 0.0 4.3 FLOODS6.004 S24 44.753 1.337 71.569 0.11 0.0 7.3 FLOODS6.005 S25 44.768 1.477 80.987 0.13 0.0 8.1 FLOODS3.007 S26 44.786 1.580 275.604 0.18 0.0 38.8 FLOOD
Betts Associates Ltd Page 11Old Marsh Farm BarnsWelsh Road SealandFlintshire CH5 2LYDate 22/04/2016 12:48 Designed by simondowningFile SW N1 REV C with 33lsec... Checked byMicro Drainage Network 2014.1.1
100 year Return Period Summary of Critical Results by Maximum Level (Rank1) for SW N1 PDS OUT REV C.SWS
©1982-2014 XP Solutions
S3.008 S27 44.793 1.624 394.998 0.14 0.0 39.5 FLOODS1.006 S28 44.803 1.706 205.120 0.34 0.0 66.0 FLOODS1.007 S29 44.811 1.592 1024.095 0.13 0.0 43.1 FLOODS1.008 S30 44.822 1.758 1034.518 0.23 0.0 41.8 FLOODS1.009 S31 44.831 2.016 679.766 0.00 0.0 0.0 FLOODS1.010 S32 45.310 2.561 1287.186 0.00 0.0 0.0 FLOODS1.011 S33 45.369 2.718 1472.623 -0.05 0.0 -4.4 FLOODS1.012 S34 45.416 2.032 2115.811 -0.02 0.0 -13.1 FLOODS1.013 S35 45.422 2.063 1951.914 0.04 0.0 29.1 FLOODS1.014 S36 45.422 2.632 1871.603 2.36 0.0 4.1 FLOODS7.000 S37 41.720 -0.630 0.000 0.00 0.0 0.0 OKS7.001 S38 41.710 -0.630 0.000 0.00 0.0 0.0 OKS7.002 S39 41.640 -0.630 0.000 0.00 0.0 0.0 OKS1.015 S40 41.631 -0.579 0.000 0.00 0.0 4.1 OK
PNUS/MHName
WaterLevel(m)
Surch'edDepth (m)
FloodedVolume(m³)
Flow /Cap.
O'flow(l/s)
PipeFlow(l/s) Status
4
3
.
0
0
4
3
.
5
0
4
3
.
5
0
4
3
.5
0
43.50
4
3
.
5
0
4
3
.
5
0
4
3
.
5
0
4
4
.
0
0
4
4
.
0
0
44.0
0
4
4
.
0
0
4
4
.
0
0
4
4
.0
0
4
4
.
0
0
4
4
.
0
0
4
4
.
0
0
4
4
.
0
0
4
4
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0
4
4
.
5
0
4
4
.
5
0
4
4
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0
4
4
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5
0
4
5
.
0
0
0
4
5
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0
0
STN6
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x
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r
@
1
:
9
2
(
f
r
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m
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c
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)
UU5301
exg sewer
il 41.55 (675)
UU6301
exg sewer
il 41.65 (675)
UU5302
exg sewer
il 41.54 (600)
UU6402
exg sewer
il 42.51 assumed (450)
il 42.36 (600)
UU6401
exg sewer
il 43.13 (450)
43.01
42.49
4
3
.
0
0
4
3
.
5
0
4
3
.
5
0
4
3
.5
0
43.50
4
3
.
5
0
4
3
.
5
0
4
3
.
5
0
4
4
.
0
0
4
4
.
0
0
44.0
0
4
4
.
0
0
4
4
.
0
0
4
4
.0
0
4
4
.
0
0
4
4
.
0
0
4
4
.
0
0
4
4
.
0
0
4
4
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0
4
4
.
5
0
4
4
.
5
0
4
4
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0
4
4
.
5
0
4
5
.
0
0
0
4
5
.0
0
0
STN6
O
P
P
132
133
132
133
O
P
P
OP
P
E
E
F
F
L
4
5
.0
0
FF
L 44.85
F
F
L
4
4
.
8
5
G
S
L
4
4
.8
5
G
S
L
4
4
.7
0
UU6301
UU6401
1
.
0
0
9
1
.0
1
0
1
.
0
1
1
1
.
0
0
8
1
.0
0
4
1
.0
0
5
1.006
3
.
0
0
7
3
.
0
0
8
S10
S27
S28
S29
S31
S32
S33
S35 (node)
S30
HP
F22
1.008
1
.0
0
7
3
7
5
m
m
@
1
:9
6
4
2
.7
2
6
CL44.944
4
3
.1
9
5
3
7
5
m
m
@
1
:6
9
T
y
p
e
C
O
N
C
42.473
CL44.598
42.501
600m
m
@
1:393
Type C
O
N
C
CL43.704
4
2
.3
2
3
CL44.061
4
2
.
4
6
6
6
0
0
m
m
@
1
:
4
0
3
T
y
p
e
C
O
N
C
CL44.213
4
2
.
4
4
2
3
7
5
m
m
@
1
:
3
0
0
T
y
p
e
C
O
N
C
CL44.023
4
2
.3
7
4
3
7
5
m
m
@
1
:3
0
1
T
y
p
e
C
O
N
C
CL43.896
4
2
.
2
7
6
CL43.470
3
7
5
m
m
@
1
:
3
0
0
T
y
p
e
C
O
N
C
4
2
.
6
1
0
6
0
0
m
m
@
1
:
3
9
6
T
y
p
e
C
O
N
C
4
2
.
5
0
1
CL44.398
4
2
.
5
7
3
6
0
0
m
m
@
1
:
4
0
0
T
y
p
e
C
O
N
C
42.991
CL45.736
4
2
.4
3
8
1
5
0
m
m
@
1
:1
5
6
T
y
p
e
C
L
A
Y
42.020
CL44.085
42.295
CL44.611
150mm @ 1:147
Type CLAY
S34 (new headwall)
CL43.300
S36 (node)
CL43.550
S40 (node)
CL42.450
S41 (node)
CL42.652
S39 (node)
CL43.150
S38 (node)
CL43.200
S37 (node)
CL44.100
1
.
0
1
2
1.0
13
1.0
14
600m
m @
1:1
27
Typ
e C
ON
C
A
5
9
Worst case point of
total culvert blockage
A
5
9
E
m
b
a
n
k
m
e
n
t
E
m
b
a
n
k
m
e
n
t
DWH133 - Mitton Road, Whalley (David Wilson Homes)
Indicative Overland Flood Flow Routing (Culvert Total
Blockage Scenario)
(not to scale) 22.04.16 S.Downing, Betts Associates
Lowest point on
boundary 43.49m AOD
Overland flood flow off site to
River Calder once flood level of
44.00m AOD is reached (existing
level at south west corner)
Direction of
overland flood flow
Legend
Spring Lodge
172 Chester Road
Helsby
Cheshire
WA6 0AR
UK
Telephone: +44 (0)1928 726006
Fax: +44 (0)1928 725633
www.rsk.co.uk
RSK Land & Development Engineering Ltd
Registered office
Spring Lodge • 172 Chester Road • Helsby • Cheshire • WA6 0AR • UK
Registered in England No. 4723837 www.rsk.co.uk
30th August 2012 Our Reference: 880213/CW/L02 Planning App. Ref. 3/2012/0637 Planning Liaison Environment Agency Ghyll Mount (Gillian Way) Penrith 40 Business Park Cumbria CA11 9BP For the attention of: Ms Jilly Dixon Dear Jilly RE: PROPOSED ERECTION OF 116 TWO, THREE, FOUR AND FIVE BEDROOM DWELLING AND
21 ONE BEDROOM BUNGALOWS, TOGETHER WITH ASSOCIATED LANDSCAPING, OPEN
SPACE, DRAINAGE INFRASTRUCTURE, CAR PARKING AND ACCESS ROAD. LAND AT MITTON
ROAD, WHALLEY, LANCASHIRE.
I refer to the Environment Agency’s response (EA Ref. NO/2012/104110/01-L01) to the flood risk
assessment prepared by RSK (Report Ref. 880213 R1 (01)).
The Environment Agency states that the site falls within Flood Zone 1, 2 and 3 according to the latest
Environment Agency Flood Zone Map. This is correct; however the latest development layout does not
include any residential developments with Flood Zones 2 or 3. All the residential plots are located in
Flood Zone 1 in accordance with the requirements of the NPPF sequential test for flood risk.
The Environment Agency noted that the site flooded in July 2012 according to anecdotal evidence from
the local residents. This flooding is associated with out of bank flow from the River Calder. There is no
evidence of the return period of this flood event; however the development is located significantly above
the modelled 1 in 1000-year flood event. The hydraulic model results that have been provided by the
Environment Agency are based on the Whalley SFRM, 2009 and are considered to be the best available
information for flood risk at the site. The upstream modelled flood level for the 1 in 100 year event
including an allowance for climate change is 42.19m AOD and 43.13m AOD for the 1 in 1000-year event.
Site levels along the southern boundary range from 44.10m AOD to the south west corner and 44.22m
AOD to the south east. Along the eastern boundary (where flooding was reported by the resident of
Cross House) site levels have a low point of 43.13m AOD, this is equivalent to the top water level for the
1 in 1000-year event. Therefore should the site have flooded, the return period of the event would have
exceeded the 1000-year event and therefore exceeds the requirements of the NPPF.
The floor levels of the development are to be set no lower than 44.50m AOD, some 1.37m above the 1 in
1000-year event and 2.31m above the 1 in 100-year flood level including allowance for climate change.
We are also aware that the site may have been impacted by flooding from overland flows due to the
impermeable soils. This has been considered in the surface water drainage design. The surface water
network for the site has been designed to attenuate flows to the greenfield run-off rate and a detention
pond to retain flows on site with overland flow routes considered to ensure the proposed properties do
not flood. By ensuring that the post development run-off rates do not exceed the pre-development run-off
rate, flood risk as a result of the development is not exacerbated and will not impact on the existing
properties or land.
Yours sincerely, For RSK Land & Development Engineering Ltd
Colin Whittingham
Principal Hydrologist
C.C Colin Worswick; Environment Agency
Sarah Westwood; Ribble Valley Borough Council
Laurie Lane; Turley Associates
