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CAMEROUN MINISTERE DE L’AGRICULTURE ET DU DEVELOPPEMENT RURAL
CAMEROUN
ETUDE PREPARATOIRE POUR LE PROJET D’AMENAGEMENT DES INFRASTRUCTURES AGRICOLES
AU CAMEROUN
RAPPORT FINAL
Annexe
FEVRIER 2017
AGENCE JAPONAISE DE COOPERATION INTERNATIONALE
NTC INTERNATIONAL CO., LTD. EARTH AND HUMAN CORPORATION CO., LTD.
17- 005
6R
CR(3)
CAMEROUN MINISTERE DE L’AGRICULTURE ET DU DEVELOPPEMENT RURAL
CAMEROUN
ETUDE PREPARATOIRE POUR LE PROJET D’AMENAGEMENT DES INFRASTRUCTURES AGRICOLES
AU CAMEROUN
RAPPORT FINAL
Annexe
FEVRIER 2017
AGENCE JAPONAISE DE COOPERATION INTERNATIONALE
NTC INTERNATIONAL CO., LTD. EARTH AND HUMAN CORPORATION CO., LTD.
A-1
1. List of the persons to be interviewd
A-2
2. Minutes of Meeting (Inception Report)
A-3
A-4
A-5
3. Minutes of Meeting (Interim Report)
A-6
A-7
A-8
A-9
A-10
A-11
4. Minutes of Meeting (Japan Visit)
A-12
A-13
A-14
5. Minutes of Meeting (Draft Final Report)
A-15
A-16
A-17
A-18
A-19
6. Annex of Irrigation Component
Result of Soil Profile Survey (1) Upper Site of Upper Bumenda
Date of Soil Survey 14th/Mar/2016Surveyor Takashi KOTEGAWA
Location 5°58'38.30"N 10°24'37.99"EAltitude 1,179 mSoil ClassificationRemarks The soil pit is located in the rice seed producing farmland managed by the UNVDA. Since the farmland
belongs to UNVDA, the cultivation activities are rarely conducted in dry season. The farmland was reclaimed
approximately 40 years ago. The clear horizons are observed between each layer. The soil texture is assumed to be high in clay contents in the soil. Moreover,
the viscosity, plasticity and compactness are also high indicating that the amount of vertical drainage of the
water would be low, while the soil could retail the soil nutrients for the favourable growth of rice. The mottles of iron are observed from the upper layer to lower layer
though its abundance is different depending on the layers.
Horizon Range(cm) Profile
Ap 0-14/16
Horizon Smooth, Abrupt Color (Wet) 5YR 3/4 Mottles Irregular, FewSoil Texture Light Clay Gravel Fine gravel, Sub-angular, Few Structure
Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity Plastic CompactnessMedium (20-24mm) Hardness Slightly Hard Plant roots Fine, Common
Ad 14/16-30
Horizon Smooth, Clear Color (Wet) 5YR 3/4 Mottles Irregular, FewSoil Texture Clay Loam Gravel Fine gravel, Sub-angular, Few Structure
Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity Plastic CompactnessCompact (25-28mm) Hardness Hard Plant roots Fine, Very few
B 30-45/50
Horizon Smooth, Clear Color (Wet) 5YR2/3 Mottles Irregular, CommonSoil Texture Clay Loam Gravel Fine gravel, Sub-angular, Few Structure
Massive Viscosity Sticky Plasticity Plastic Compactness Very compact (>29) Hardness Hard Plant roots Fine, Very few
C1 45/50-68
Horizon Smooth, Clear Color (Wet) 5YR3/3 Mottles Irregular, CommonSoil Texture Light Clay Gravel None Structure Massive Viscosity
Sticky Plasticity Plastic Compactness Very compact (>29) HardnessHard Plant roots None
C2 68-85+
Color (Wet) 5YR4/4 Mottles Irregular, Common Soil Texture Clay LoamGravel None Structure Massive Viscosity Sticky Plasticity
Plastic Compactness Very compact (>29) Hardness Very Hard Plant rootsNone
A-20
Result of Soil Profile Survey (2) Middle Site of Upper Bumenda
Date of Soil Survey 14th/Mar/2016
Surveyor Takashi KOTEGAWALocation 5°58'17.39"N 10°25'2.84"E
Altitude 1,170 mSoil Classification
Remarks The soil pit is located in the farmland managed by the local farmer. The farmland is cultivated for maize, beans etc. in dry season while paddy cultivation is
conducted in rainy season. The farmland was reclaimed
approximately 40 years ago. The soil clay contents are assumed to be high in the soil of each layer. The mottles
of iron in the lower soil layer are more abundant than that of Upper site. Moreover, the accumulation of iron is
observed in the B horizon indicating that the permeabilityof surface layer could be low and the reduced condition of
the soil in the lower layer might be affected by the ground
water.
Horizon Range(cm) Profile
Ap 0-15/18
Horizon Wavy, Claer Color (Wet) 5YR 3/1 Mottles Irregular, Few Soil Texture Clay Loam Gravel Fine gravel, Sub-angular, Few Structure Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity Very Plastic CompactnessMedium (20-24mm) Hardness Slightly Hard Plant roots Fine, Common
Bdgir 15/18-20/22
Horizon Wavy, Clear Color (Wet) 5YR 4/4 Mottles Irregular, CommonSoil Texture Light Clay Gravel Fine gravel, Sub-angular, Few Structure
Massive Viscosity Sticky Plasticity Very Plastic Compactness Compact (25-28mm) Hardness Slightly Hard Plant roots Fine, Very few
Cg1 20/22-50
Horizon Smooth, Clear Color (Wet) 5YR 5/1 Mottles Irregular, AbundantSoil Texture Clay Loam Gravel None Structure Massive Viscosity
Sticky Plasticity Plastic Compactness Very compact (>29) HardnessVery Hard Plant roots Fine, Very few
Cg2 50-80+
Color (Wet) 5YR 6/1 Mottles Irregular, Abundant Soil Texture Light ClayGravel None Structure Massive Viscosity Sticky Plasticity
Very Plastic Compactness Compact (25-28mm) Hardness Very Hard Plant roots None
A-21
Result of Soil Profile Survey (3) Lower Site (1) of Upper Bumenda
Date of Soil Survey 14th/Mar/2016Surveyor Takashi KOTEGAWA
Location 5°58'22.02"N 10°25'51.79"EAltitude 1,161 m
Soil ClassificationRemarks The soil pit is located in the farmland managed by the local farmer. The farmland is cultivated for maize,
beans etc. in dry season while paddy cultivation is
conducted in rainy season. The farmland was reclaimedapproximately 40 years ago. The soil clay contents are
assumed to be high in the soil of each layer. The ground water are observed in this soil pit. The height of ground
water is around 60 cm from the surface. The mottles of iron are found in the lower layer, but most of soil colors in
this pit are greyish, indicating the strongly reduced
condition of the soil.
Horizon Range(cm) Profile
Ap 0-15/22
Horizon Irregular, Clear Color (Wet) 5YR 3/1 Mottles None Soil TextureLight Clay Gravel Fine gravel, Sub-angular, Few Structure Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity Very Plastic Compactness Compact (25-28mm) Hardness Slightly Hard Plant roots Fine, Common
BC 15/22-42/45
Horizon Wavy, Diffuse Color (Wet) 5YR 3/2 Mottles Irregular, FewSoil Texture Heavy Clay Gravel Fine gravel, Sub-angular, Few Structure
Massive Viscosity Sticky Plasticity Very Plastic Compactness Compact (25-28mm) Hardness Slightly Hard Plant roots None
Cg1 42/45-68/70
Horizon Wavy, Diffuse Color (Wet) 5YR 6/1 Mottles Irregular, CommonSoil Texture Light Clay Gravel None Structure Massive Viscosity
Sticky Plasticity Very Plastic Compactness Compact (25-28mm) HardnessHard Plant roots None
Cgir2 68/70-85+
Color (Wet) 7.5YR 6/6 Mottles Irregular, Common Soil Texture Heavy Clay Gravel None Structure Massive Viscosity Sticky PlasticityVery Plastic Compactness Compact (25-28mm) Hardness Hard Plant rootsNone
A-22
Result of Soil Profile Survey (4) Lower Site of Upper Bumenda 2
Date of Soil Survey 15th/Mar/2016Surveyor Takashi KOTEGAWA
Location 5°58'10.84"N 10°26'50.50"EAltitude 1,161 m
Soil ClassificationRemarks The soil pit is located in the farmland managed by the local farmer. The farmland is cultivated for maize,
beans etc. in dry season while paddy cultivation is
conducted in rainy season. The farmland was reclaimedapproximately 7 years ago, which is different from the
other soil pits. The agricultural machines such as tractor are not utilized in this area since the suitable internal road
for the machines are not well constructed. The ground water are observed in this soil pit. The height of ground
water is around 90 cm from the surface. The mottles of
the iron are observed in B horizon, indicating the low water permeability.
Horizon Range(cm) Profile
Ap 0-10/15
Horizon Wavy, Diffuse Color (Wet) 5YR 3/1 Mottles Root-like, FewSoil Texture Clay Loam Gravel Fine gravel, Sub-angular, Few Structure
Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity Plastic CompactnessMedium (20-24mm) Hardness Slightly Hard Plant roots Fine, Common
AB 10-15/20-25
Horizon Irregular, Diffuse Color (Wet) 5YR 3/1 Mottles Root-like, Few Soil Texture Light Clay Gravel Fine gravel, Sub-angular, Few Structure
Week, Fine, Sub-angular blocky Viscosity Sticky Plasticity PlasticCompactness Compact (25-28mm) Hardness Hard Plant roots Fine
Few
Bg 20-25/45-53
Horizon Wavy, Clear Color (Wet) 7.5YR 5/1 Mottles Root-like & Irregular, Common Soil Texture Heavy Clay Gravel None Structure Massive
Viscosity Sticky Plasticity Very Plastic Compactness Compact (25-28mm)Hardness Hard Plant roots Fine, Very few
C1 45-53/70
Horizon Smooth, Clear Color (Wet) 5YR 5/1 Mottles Irregular, CommonSoil Texture Heavy Clay Gravel None Structure Massive Viscosity
Sticky Plasticity Very Plastic Compactness Compact (25-28mm) HardnessHard Plant roots None
C2 70-85+
Color (Wet) 7.5YR 4/1 Mottles Irregular, Few Soil Texture Heavy ClayGravel None Structure Massive Viscosity Sticky Plasticity Very
Plastic Compactness Compact (25-28mm) Hardness Hard Plant rootsNone
A-23
A-24
A-25
A-26
A-27
A-28
7. List of Drawings (Irrigation Component)
Title Nos PageGeneral Plan 1 A-30Drainage Canal and Farm Road 1 A-31Main Drainage Plan and Profile 9 A-32, 33, 34, 35, 36, 37, 38,
39,40Tractor Passage 1 A-41Farm Road Crossing 2 A-42, 43Irrigation Canal 1 A-44Bridge 2 A-45, 46, 47, 48
A-29
A-30
5000
100
200
300
5720
1:1.2
b500 500
BH H
5001:1.0
b 500500
B HH
500
1:1.0
5000
7880
1:1.2
300
CL
b 500500
BH
H
1:1.0
100
1200 b500 500
500
H
BH H
B:b:H:
Drainage Type A
0.41.60.6
Drainage Type B
0.52.10.8
Drainage Type C
0.62.61.0
Drainage Type D
0.83.21.2
Drainage Type E
1.24.61.7
Drainage Type G Drainage Type H
4.08.22.1
Drainage Type I
4.89.02.1
Drainage Type J
5.29.42.1
8.012.42.2
Drainage Type F
1.65.62.0
Drainage Canal and Farm Road
Farm Road TypeA
Farm Road TypeB
Drainage CanalDrainage Canal
Drainage Canal
1:1.0
Drainage CanalCL
CL
CL
CL
CL
Cross Section
Cross Section
S=1:50
S=1:50
B'
H'
B
50
500
960
H
1:1.0
150
500
CL
Farm Field LevelFarm Field Level
300
360 360
A-31
A-32
A-33
A-34
A-35
A-36
A-37
A-38
A-39
A-40
5000
1200
H
HBH5001440
b
1:1.21:1.2
1:1.0
1:1.0
Road
Masonry WorkMasonry Work
250
3000
250
5000 1440 500 H B H
Tractor Passage TypeA~E
5000
300
600
500360
1:1.2 1:1.2
1:1.0 1:1.0
600400600
1600
200
3000
200
Road
Masonry WorkMasonry Work
Ø30
0
5000240
500 H B H240
CL CL
CLCL
Tractor Passage
Tractor Passage TypeF
Cross SectionCross Section
PlanPlanS=1:100 S=1:100
ΦD
Type AB: b: H:
0.4 1.6 0.6
B: b: H: B: b: H: B: b: H:
0.5 2.1 0.8 0.6 2.6 1.0 0.8 3.2 1.2
Tractor Passage TypeAD=Φ800
Drainage
Tractor Passage TypeBD=Φ1000
Tractor Passage TypeCD=Φ1000x2
Type BDrainage
Type CDrainage
Type DDrainage
Drainage Canal
Drainage Canal
NOTE: Construction of Tractor Passage Type A~E@120m along Farm Road in Middle anddownstream area.
NOTE: Construction of Tractor Passage Type F @20m along Farm Road in upstream area.
B: b: H:
1.2 4.6 1.7
Type EDrainage
Tractor Passage TypeDBox w1.5xh1.0
Tractor Passage TypeEBox w2.0xh1.0
A-41
5000
7880
1:1.2
500
8880
Farm Road CrossingRoad Crossing TypeA~GPlan
S=1:100
Cross Section
Road
CL
CL
H
1:1.0
L
A
A
Cross Section A-A
500
200200
H20
080
0
600
200
1200
200
200
C
5000
7880500 500200200
8880
W200
W200200
Road
Drainage Canal
8480
Type A Type B Type C Type D
W1.0xH1.5 W2.0xH1.0 W2.0xH1.5 W2.0xH2.0
Type E Type F Type G
W2.0xH2.0 W2.5xH2.5 W2.5xH2.5
CrossingFarm Road
CrossingFarm Road
CrossingFarm Road
CrossingFarm Road
CrossingFarm Road
CrossingFarm Road
CrossingFarm Road
(Double) (Double) (Triple)
A-42
5000
7880
1:1.2
500
8880
Farm Road CrossingRoad Crossing TypeH~I
Plan
S=1:100
Cross Section
Road
CL
CL
A
A
500
200200
100
300
7880500 500200200
8880
Cross Section A-A
1200
500
500
200
200
100
200
D
D
200
300
200
100
500
D
CL
D20
020
0
200 200100 100
D
D10
010
020
020
0
30°
Road
Drainage Canal
Drainage Canal
8480
Type HCrossing
Type I
D800 D1000100
100
Farm RoadCrossing
Farm Road
A-43
1000
200
1400
400
500
500130 130
130 130
130
130
810
0
CL
1400
200
200200
580
500
70052
0
500
50150100
92
CL
200 1000 200130 130
15090 90
630
70
40
Division Box
200
1400
200
200
A A
Cross Section A-A
S=1:30
Steel gate
t=6mm
200 1000 200
200 200
Irrigation Canal
Plan
W580xH520
CL
130
8
200
50
150
50
654065
2011
013
0
420
Φ13 CL
200
280
InletNOTE: Construction of
inlet @10m alongIrrigation canal.
Steel gateW260xH420
40
260
t=6mm
S=1:30
Cross Section
Plan
B'
H'
B
50
500
960
H
1:1.0
B:B':H:H':b:
Irrigation Type A
0.40.660.40.530.86
Irrigation Type B
0.50.760.50.630.96
150
500
Irrigation Canal
CL
S=1:30
Cross Section
A-44
4.05
18.00
Wing wall
Approach slab
Abutment
Gargoyle Ø 100 mm)
Spread footer
Embankment
Spread footer
4.00
EL=1156.2m
1.55
0.20 0.20
1.00
0.10
EL=1159.4m
EL=1158.9m 6.50
1.00
0.10
5.00
1.25
6.25
1.10
3.00
3.30
EL=1160.95m
0.80
0.70
EL=1160.95m
0.31
1.22
2.05
3.25
3.20
0.80
0.50
3.25
0.90
1.90
0.25
1.00
4.80
SECTION PLAN6.
25
CROSS SECTION
Gargoyle Ø100mm
2.5%
Gargoyle Ø100mm
2.5%
5.006.00
2.00 2.002.00
0.55
0.35
0.20 0.
20
0.200.300.500.50
0.50
0.10
0.50
0.30
0.30
0.40
0.80
FORM PLAN ABUTMENT
2.5%
Approach slab
Scabbard PVC
Divice support elastomerhooped (20x30)
2.5%
0.30 0.30Scabbard PVC
0.30 5.40 0.301.70 2.00 1.70
6.00
0.20
1.05
0.20
0.35 0.
551.
051.
000.
100.20 6.00 0.206.40
4.00 6.
601.
60
0.20
0.20
0.20 4.00 0.204.40
1.00
0.10
3.544.
001.
25
0.92
0.30
0.50
5.25
6.25
5.25
0.70 0.30
0.30
1.301.00
1.20 0.80 2.00
0.50
ABUTMENT SECTION
A-45
2.5%
2.5%
Guardrail (galvanized steelØ60mm)Round steel tube Ø60mm
5 %
5 %
PLAN VIEW
2.00
0.18
10.0
06.
0010
.00
26.0
0
0.90 4.05 6.50 4.80 0.90
18.00
5.40
5.00
0.50
0.50
6.00
0.30
0.30
A-46
4.80
Wing wall
Approach slab
Gargoyle Ø 100 mm)
Spread footer
Embankment
Spread footer
4.00
EL=1156.2m
1.65
0.20 0.20
EL=1154.1m
EL=1153.7m
6.85
1.00
0.10
4.00
1.25
5.25
1.10
3.00
3.30
EL=1155.75mEL=1155.75m
0.40
1.22
6.50
2.05
3.10
0.80
0.50
4.05 4.65
5.40
0.92
18.00
0.50
6.25
1.00
FORM PLAN ABUTMENT
2.5%
Approach slab
Scabbard PVC
Divice support elastomerhooped (20x30)
2.5%
0.30 0.30Scabbard PVC
0.30 5.40 0.301.70 2.00 1.70
6.00
0.20
1.05
0.20
0.35 0.
551.
051.
000.
100.20 6.00 0.206.40
4.00 6.
601.
60
0.20
0.20
0.20 4.00 0.204.40
1.00
0.10
3.544.
001.
25
0.92
0.30
0.50
5.25
6.25
5.25
0.70 0.30
0.30
1.301.00
1.20 0.80 2.00
0.50
ABUTMENT SECTION
CROSS SECTION
Gargoyle Ø100mm
2.5%
Gargoyle Ø100mm
2.5%
5.006.00
2.00 2.002.00
0.55
0.35
0.20 0.
20
0.200.300.500.50
0.50
0.10
0.50
0.30
0.30
0.40
0.80
A-47
2.5%
2.5%
Guardrail (galvanized steelØ60mm)Round steel tube Ø60mm
5 %
5 %
PLAN VIEW
2.00
0.18
10.0
06.
0010
.00
26.0
0
0.90 4.05 6.50 4.65 0.90
5.00
0.50
0.50
6.00
A-48
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