FLOOD DATA FOR THE SACRAMENTO RIVER AND BUTTE …FLOOD DATA Floodflows were measured at the following sites (figs. 2 and 3) to define flow distribution: 1. Sacramento River at Butte

FLOOD DATA FOR THE SACRAMENTO RIVER AND

BUTTE BASIN, SACRAMENTO VALLEY, CALIFORNIA 1980-90

By Jerry G. Harmon

U.S. GEOLOGICAL SURVEY

Open-File Report 93-68

Prepared in cooperation with theCALIFORNIA DEPARTMENT OF WATER RESOURCES

c\ CM o

Sacramento, California 1994

U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director

Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.

For sale by the U.S. Geological Survey Earth Science Information Center Open-File Reports Section Box 25286, MS 517 Denver Federal Center Denver, CO 80225

For additional information write to: District Chief U.S. Geological Survey Federal Building, Room W-2233 2800 Cottage Way Sacramento, CA 95825

CONTENTS

Abstract 1 Introduction 1 Flood data 3

Peak flows 3Peak stages 10Floods of 1980-86 14

Channel geometry 15 Summary 15 References Cited 16

FIGURES

1-3. Maps showing:1. Location of study area 22 Locations of streamflow gaging stations, crest-stage gaging stations, and historical high-water-mark

sites for the Sacramento River and Butte Basin 4 3. Locations of floodflow-measuring sites on State Highway 162 near Butte City 7

4. Graph showing streamflow ratings for bridge 11-24 on State Highway 162 near Butte City for two flood periods 8

5. Hydrographs showing peak flow for Sacramento River and in Butte Basin at the latitude of Butte City, February 1980 8

6. Graph showing selected peak stages of the Sacramento River, February 1986 147. Map showing locations of cross sections that are surveyed annually 17

TABLES

1. Peak flows and peak stages for Sacramento River at Butte City and Angel Slough at Ord Ferry Road 82. Distributions of peak flows at the latitude of Butte City during selected floods, 1980-86 93. Elevations of peak stages in the Sacramento River and Butte Basin, 1980-86 114. Coordinate data for six cross sections of the Sacramento River 19

Contents

Conversion Factors and Vertical Datum

Conversion Factors

Multiply By To obtain

acre-foot (acre-ft)cubic foot per second (ft3/s)

cubic yard (yd3)foot (ft)

mile (mi)ton

0.0012330.028320.76460.30481.6090.9072

cubic hectometercubic meter per secondcubic metermeterkilometermegagram

Vertical Datum

Sea level: In this report "sea level" refers to the National Geodetic Vertical Datum of 1929 a geodetic datum derived from a general adjustment of the first-order level nets of the United States and Canada, formerly called Sea Level Datum of 1929.

Definition

Water year: A water year is a 12-month period that begins October 1 and ends September 30 and is designated by the calendar year in which it ends. In this report, years are water years unless otherwise noted.

IV Conversion Factors and Vertical Datum

FLOOD DATA FOR THE SACRAMENTO RIVER AND BUTTE BASIN,

SACRAMENTO VALLEY, CALIFORNIA, 1980-90

By Jerry G, Mormon

Abstract

Floodflows and peak stages of floods were measured and channel cross sections were sur veyed at sites along the Sacramento River and in Butte Basin, Sacramento Valley, California, dur ing 1980-90 to document magnitudes of flooding and channel changes. The study reach extends from rivermile 200 near Hamilton City to rivermile 134 near Meridian. Data were collected for each flood at about 70 sites that include streamflow gages, crest-stage gages, bridges and road overflows on State Highway 162 east of Butte City, and locations of historical high-water marks. Six cross sections of the river between rivermiles 193.7 near Big Chico Creek and 183.3 near Ordbend were surveyed annually during calendar years 1981-84 and 1986-90.

Floodflows (peak flow 157,000 cubic feet per second) almost equaled the design flow capacity of the river at Butte City on March 2, 1983, when the peak stage of 93.0 feet was 5 feet below the top of the levee. This was the largest flood re corded at Butte City during 1980-90. The most recent flood occurred February 18-19, 1986, when the peak stage in the river at Butte City was 92.0 feet and the peak flow was 145,000 cubic feet per second.

INTRODUCTION

Floodflows and peak stages of floods were measured at sites along the Sacramento River and in

Butte Basin during 1980-90 to document magnitudes of flooding. The study reach extends from rivermile 200 near Hamilton City to rivermile 134 near Meridian (fig. 1); the rivermile system was desig nated by the U.S. Army Corps of Engineers (1984). Because streambank erosion and channel migration of the river may change proportional amounts of flow in the river and Butte Basin, peak stage and channel geometry changes were monitored in the study reach during 1980-90. Six cross sections of the river were surveyed annually during calendar years 1981-84 and 1986-90 to determine the extent of channel migration and scour caused by channel erosion. This report presents data that supplement flood data assembled during earlier studies of flooding of the Sacramento River and Butte Basin for 1874-1978 (Blodgett, 1981) and 1973-77 (Simpson, 1978). Studies of floodflows in the Sacramento River and Butte Basin have been reported by the U.S. Geological Survey in cooper ation with the California Department of Water Resources and other agencies since 1970.

Butte Basin is an agricultural area on the flood plain east of the Sacramento River (fig. 1) between Big Chico Creek and Meridian. Rice is the principal crop, but orchards and row crops also are cultivated in the area. Much of the basin is a waterfowl-wintering area that is enhanced by flooding. Changes in the distribution of flows across the flood plain are caused by farming activities, growth or clearing of vege tation, and roadway and bridge construction (Blodgett and Stiehr, 1974).

During periods of flooding on the Sacramento River between Big Chico Creek and Meridian (fig. 1), flows inundate Butte Basin. Levees on the left (east) bank of the river downstream from rivermile 176 near Glenn prevent flooding into Butte Basin; however,

Introduction 1

39°45'122°00' 121°45'

39°30'

39°15'

Hamilton b r* 200 City

Chico

Nelson

D Gridley

Yuba City

Butte \ Slough

Sutler Bypass

ME»CO

EXPLANATION

EAST-SIDE BASIN BOUNDARY

OVERFLOW LOCATION

LEVEE

200 RIVERMILE - Represents distance from mouth

0 5 MILESI l i l i II II ll|0 5 KILOMETERS

Figure 1. Location of study area. (Modified from Simpson, 1978).

2 Flood Data for the Sacramento River and Butte Basin, Sacramento Valley, California, 1980-90

during flows that exceed about 40,000 ft3/s, controlled overbank flow into Butte Basin occurs at Moulton and Colusa Weirs near Colusa. When river flows exceed about 80,000 ft3/s, flows begin to inundate Butte Basin between rivermiles 194 and 176 upstream from the end of the left-bank levee near Glenn by over-topping the riverbank and by entering sloughs and swales near the river channel. Filling of scour holes and modification of levees to regulate the amount of overbank flow to Butte Basin in the reach between rivermiles 194 and 176 were necessary following the floods in 1983 and 1986.

The diversions of floodwater to Butte Basin be tween Chico and Glenn decrease the total flow of the river within the leveed channel downstream from rivermile 176. The design flow capacity of the river in the leveed channel upstream from Moulton Weir to Butte City is 160,000 ft3/s; overbank diversions from the river to Butte Basin near Chico prevent excessive flows that could cause overtopping of levees on both banks downstream from Glenn.

Overland flow in Butte Basin was about one-third of the total peak flow of 225,000 ft3/s measured at the latitude of Butte City on January 24, 1970 (Blodgett and Pearce, 1971). Because most bridges on State Highway 162 in Butte Basin lack the capacity to con vey floods, excess floodflows cross the highway between bridges at eleven sites.

FLOOD DATA

Floodflows were measured at the following sites (figs. 2 and 3) to define flow distribution:

1. Sacramento River at Butte City (11389000)

2. Angel Slough at Ord Ferry Road (11390140)

3. Fifteen bridges and eleven road-overflow sites on State Highway 162, including Butte Creek (11390020) and Campbell Slough (11390027).

Bridges and road-overflow sites are considered miscellaneous measuring sites, except at Butte Creek and Campbell Slough (fig. 3), where streamflow gag ing stations are operated. Peak stages were measured at streamflow gaging stations, crest-stage gaging sta

tions, and historical high-water mark sites (fig. 2). Peak stage data at selected sites are used to define water-surface profiles and indicate locations where peak stages are encroaching on the levee freeboard. Freeboard is that part of the levee 3 ft below the top (U.S. Army Corps of Engineers, 1991).

PEAK FLOWS

The possibility of flooding at Butte City can be estimated by using the California Department of Water Resources and California-Nevada forecast center, which provides hourly stage and flow data for the Sacramento River at Ord Ferry (11388700) (fig. 2) and other stations in the study reach. During the floods of February 1980, December 1981, January and March 1983, and February 1986, flow measurements were made in the Sacramento River at Butte City and in Butte Basin at selected locations on State Highway 162 (fig. 3) to determine the rates of flow in the river and in Butte Basin. Flows were not measured on State Highway 162 during the flood of December 1983. Measurements were made at the latitude of Butte City because the gaging stations Sacramento River at Butte City (11389000), Campbell Slough (11390027), and Butte Creek (11390020) are the only stations upstream from Moulton Weir that record the total flow of the river between the levees and overland flow in Butte Basin. During the flood of February 18-19, 1986, peak flow in Butte Basin east of Butte City including Butte Creek was 73,800 ftVs, which, when combined with 145,000 ft3/s in the river, indicates total flow of 219,000 ft3/s at Butte City. Peak flows and peak stages for years 1980-86, for the Sacramento River at Butte City and Angel Slough at Ord Ferry Road are given in table 1.

Flows at bridges were measured by suspending current meters with weights from the bridge, and road overflows were measured by using a wading rod placed along the highway centerline. Descriptions and a map of the overflow areas and bridges (fig. 3) were first prepared by Blodgett and Pearce (1971). Floodflows not obtained by field measurement were determined using streamflow rating curves, which were developed for each bridge and each road- overflow area. Revisions of the rating curves for different floods were required at some sites after

Flood Data 3

122°00' 121°55'

39°45' -

39°40

39°35' -

200.011383800

Hamilton City

3 Plug OVERFLOW(FLOOD 1ELIEF

Prd Ferry 11390140

183.0 PARROTT

EXPLANATIONGAGING STATION - Eight-digit number

(11383800) is U.S. Geological Survey gaging-station number

11383800

11389350 A-

Streamflow

StageOVERFLOWAREA (FLOOD RELIEF STRUCTURE)

179.0

Crest-stage gaging station or historical high-water-mark site

Partial-record (floods only)

^00.0 RjvERMILE - Represents distance from mouthGoose Lake

pumping plant 11388800

MATCH LINE

Figure 2. Locations of streamflow gaging stations, crest-stage gaging stations, and historical high-water mark sites for the Sacramento River and Butte Basin. (Modified by Simpson, 1978).


122°00' MATCH LINE 121°55'

39°30'

39°25'

177.8 PARROTT

_ 11389000 = Sacramento River

Butte City

11390&37CampbelbSloughatHighwaAl62

GLENN COCOLUSA" ~co

MATCH

Figure 2. Continued.

Flood Data 5

122°00'

39°20

39°15'

39°10'

39 __BUTTE C 0 SUTTER " CO

S11389470r8ColusaWeir

11390390 Butte Slough at

±1 \ Mawson Bridge

=[ ='//\\\\ \iiin\\ Meridian

0 1

SMILES J

3 KILOMETERS

Figure 2. Continued.

6 Flood Data for the Sacramento River and Butte Basin, Sacramento Valley, Caiifomia, 1980-90

122°

00'

121°

55'

121°

50'

39°3

0'

§

39°2

5'

0 1

2 3

KILO

MET

ERS

Figu

re 3

. Lo

catio

ns o

f flo

odflo

w-m

easu

ring

site

s on

Sta

te H

ighw

ay 1

62 n

ear

But

te C

ity.

Table 1 . Peak flows and peak stages for Sacramento River at Butte City and Angel Slough at Ord Ferry Road

[ft, foot above sea level; ft3/s, cubic foot per second. Location of stations shown in figure 2]

c * TD- *r> ** ^-* Angel Slough at Ord Ferry Road Sacramento River at Butte City 6 Ti-annun mRQom 11390140

Date (Partial-record station 7)Peak flow Peak stage Peak flow Peak stage

(ft3/s) (ft) (ft3/s) (ft)February 20, 1980 124,000 90.16 13,100 112.79December 20-21, 1981 102,000 88.36 9,000 111.75January 27-28, 1983 130,000 90.67 15,000 113.20March 2, 1983 157,000 92.97 18,500 113.85December 25-26, 1983 129,000 90.61 15,700 113.30February 18-19, 1986 145,000 91.99 19,500 114.00

86

84

£8201_j^LUCO

£80

8

tIf 78zLlf§ 76

74

72

I I I I

_ _

1984-86 -(^ {7j _ JL u'l

~~ (^) ~""Ti7 (O 1 Qov" Ow^^^£^~~^s^./^\^'^^- /&//

f //-

0 MEASURED STREAMFLOW

_

-

till

500

OZ

8LUOT 200CCLU 0.

ID£ 100oCDz>0II c«

oCO0

1Z)0 201- zgf3 10u_

5

I i I 1

Sacramento River at Butte City

^. »^

X^^ =

^-- "--..^**

__ / * ^

,' Butte Basin at State Highway 1 62 x ^ xX

/ X

I I I I19 20 21 22 23

FEBRUARY 1980

Figure 5. Peak flow for Sacramento River and inButte Basin at the latitude of Butte City, February1980.

0 1,000 2,000 3,000 4,000 5,000STREAMFLOW, IN CUBIC FEET PER SECOND

Figure 4. Streamflow ratings for bridge 11 -24 on State Highway 162 near Butte City for two flood periods.

channel changes, such as scour or vegetative growth, occurred. Different streamflow ratings for bridge 11- 24 for two flood periods are shown in figure 4.

The distribution of peak flows during 1980-86 at the latitude of Butte City during selected floods is given in table 2. The duration of flooding in Butte Basin is based on data obtained at the two gaging sta tions (Campbell Slough, 11390027, and Butte Creek, 11390020) on State Highway 162 near Butte City. The total volume of the flood of February 19-23, 1980, at the latitude of Butte City, computed from hydrographs shown in figure 5, was 1.37 million acre-ft.


Table 2. Distributions of peak flows at the latitude of Butte City during selected floods, 1980-86

[Overflow sites described by Blodgett and Stiehr (1974). Location of overflow sites and bridges shown in figure 3. ft3/s, cubic foot per second; --, no measurement]

Road Bridgeoverflow No.

site

Flowduringtime of

current-metermeasurement

(ft3/s)

Peak flowduringtime of

peak stage (ft3/s)

February 1980

12-5612-57

1A11-27

111-2611-3411-3311-32

23

11-2411-3111-23

45

11-2267

11-2111-20

811-19

911-18

10

1561,070

1744,2401,0301,750

564915

1,62028; 149

30; 641,9402,2603,140

780; 1,2201,450; 1,830

1,9001,670; 1,790

80; 161821

1,670640; 800

345

292--

1701,100

1904,4001,0501,800

630990

1,80016075

2,3002,7003,3001,3102,4002,5002,100

330970

1,8101,150

4300

3150

Instantaneous peak flowButte Basin...........Sacramento River.

34,000124,000

December 1981

12-5612-57

1A11-27

111-2611-3411-3311-32

23

11-2411-3111-23

4

__ --

9581,2302,360

539; 872

000

3,1000

1,200590790

1,15000

1,4001,7402,6001,030


site

Flowduringtime of


(ft3/s)


peak stage(ft3/s)

December 19%1-Continued

5 11-2211-22

67

11-2111-20

811-19

911-18

10

0; 1,5201,340

1,020; 1,580266; 462

224; 669 ~

1,7501,6901,760

515770940870

0000

Instantaneous peak flowButte Basin ...........Sacramento River ,

20,900102,000

January 1983

12-5612-57

1A11-27

111-2611-3411-3311-32

23

11-2411-3111-23

45

11-2267

11-2111-20

811-19

911-18

10

201,180

5; 3502,890; 4,250

3601,800

4561,380

656

221,450; 2, 1401,350; 1,4503,250; 4, 1002,610; 2,880

3,7201,400; 1,8003,510; 4,5301,540; 1,850

1,900210; 462

4,210; 4,510119; 1,020

2,330; 2,440734650

7701,270

6604,400

9802,0001,0002,3001,350

030

2,9001,6004,3503,0003,9002,0004,6501,9302,140

6004,6001,1002,500

810740

Instantaneous peak flowButte Basin. ..........Sacramento River .

51,600130,000

Flood Data 9

Table 2. Distributions of peak flows at the latitude of Butte City during selected floods, 1 98Q-86»Continued


site

Flowduringtime of


(fP/s)


peak stage(ft3/s)

March 1983

12-5612-57

1A11-27

111-2611-3411-3311-32

23

11-2411-3111-23

45

11-2267

11-2111-20

811-19

911-18

10

__

2,4501,720; 2,290

6,2501,860

9602,500

8102,030

4,6403,3205,8205,9506,500

~7,3005,200

3602,6406,7601,3409,320

9602,690

2002,5502,8005,4007,5002,1001,2002,700

9002,800

05,0003,4005,8506,3006,6002,3007,6505,800

4503,1006,8001,6509,5001,2802,700

Instantaneous peak flowButte Basin............Sacramento River..

96,500157,000

Road overflow

site

BridgeNo.

Flowduring time of

current-meter measurement

(ft3/s)

Peak flow during time of

peak stage (ft3/s)

February 1986

1A

1

23

12-5612-57

11-27

11-2611-3411-3311-32

Cumulative flow for the above sites is 26,000 ft3/s, based ona stage-flow relationTotal for bridge 12-56 through

11-2411-3111-23

45

11-2267

11-2111-20

811-19

911-18

10

Instantaneous peak flowButte Basin.................Sacramento River, , , ,

1,570; 2,3601,460; 1,7603,100; 3,320

5,5806,350

1,510; 1,8407,6002,870

552; 6541,320; 1,730

5,430512

4,400749552

2,4001,8003,4005,8006,5002,0007,7503,180

7001,8005,600

5704,750

980600

73,800145,000

PEAK STAGES

Water-surface elevations (stage) of floods exceed ing 80,000 ft3/s at the Butte City gage (11389000) were documented at selected sites along both banks of the Sacramento River and in Butte Basin. Peak stage data can be used to determine flood profiles, indicate amount of freeboard in leveed reaches, and compute slopes of the water surface between selected locations. Data-collection sites (fig. 2) include streamflow gaging stations, crest-stage gaging stations and

locations of historical high-water marks, mostly near the banks of the river. Elevations of all marks were referenced to sea-level datum, using National Geodetic Survey benchmarks and a vertical control network established in Butte Basin during 1970-73 (BlodgettandStiehr, 1974; Blodgett, 1981).

Elevations of peak stages obtained at selected sites during 1980-86 are included in table 3. Hydrographs of selected peak stages of the Sacramento River at the gaging stations at Ord Ferry (11388700), Goose Lake


Table 3. Elevations of peak stages in the Sacramento River and Butte Basin, 1980-86

[HWM, historical high-water mark; CSG, crest-stage gage; SGS, streamflow gaging station; , no measurement. Location of sites shown in figure 2]

Site designation

HC-6:Left bank.............. ..................Right bank......... .....................

11383800 Sacramento Rivernear Hamilton City...........

Gianella Bridge, downstream:Left bank................................Right bank................... ...........

HC-7 ......................................W-25A, Dunning Slough

W-25 ......................................W-26 ......................................

Pine Creek:At State Highway 32..............At mouth.... ............................

W-54, Scotty's Landing... .......Sacramento Avenue ...............W-27 ......................................W-29, St. John Road..... .........E-10, Chico Landing..... .........

1, Big Chico Creek ................

Chico sewer outfall ................M-5 ........................................W-41 ......................................2.............................................

2.5..........................................Murphy Slough plug,

upstream...........................3.............................................W-30 ......................................

W-42 ......................................W-42A....................................W-52A, Road 29. ...................Murphy Slough plug,

downstream......................

X-5.........................................4.............................................5.............................................

W-31 ......................................

11388700 SacramentoRiver at Ord Ferry,right bank........ .................

Type of site

HWMCSG

SGS

HWMHWM

HWMHWM

HWMHWM

HWMHWM

HWMHWMHWMHWMHWM

CSG

HWMHWMHWMCSG

CSG

HWMCSGHWM

HWMHWMHWM

HWM

HWMCSGCSG

HWM

SGS

Rivermile or latitude,

Elevation, in feet above sea level1980

longitude February

199.5199.5

199.3

199.2199.2

199.1198.2

198.1197.0

196.4

196.1195.2195.1194.1193.7

39 C42/ 16//,i2i°56'i8"

192.7192.3192.039C41'05",

121°56'35"

191.0

190.5189.6189.2

188.4188.2187.5

187.0

186.5186.039C 38'54",

121°56'42"185.4

184.1

145.2145.0

144.6

144.4144.4

143.7-

141.2~

140.2139.2

139.1

133.7134.1

133.0

130.8

129.0

128.0

128.0126.4

__

123.5

120.9

118.7117.0117.2

~

114.1

1981December

-

143.8

~

-

__~

_ ~

132.3

130.7

128.3

127.7

127.6126.0

_

122.8

120.0

117.9116.0115.8

-

112.8

January

148.1

147.7

147.2147.4

__144.4

143.3141.6

142.4141.0

140.6

136.4134.6134.5

134.0

132.4

130.6130.1

129.0

129.1126.8128.1

125.2124.4123.7

121.6

119.7____

116.8

115.2

1983March

148.6--

148.4

147.7147.4

147.0144.2

143.9-

143.1142.2

140.7

135.0~

135.4

133.5

132.4131.6

129.8

130.1127.6128.7

_ --

~

____.

118.7

116.7

December

145.9

~

__--

142.5~

~--

__

135.3134.8

--

133.6

132.1

129.9

128.8

--126.0127.1

123.5

123.4

~

118.9117.3

116.7

114.8

1986February

148.6

148.2

147.6147.3

_145.1

143.8--

141.4141.3

141.1137.8136.6134.3136.0

135.2

131.1130.9

129.3

129.4126.9128.4

125.8

124.0

123.9

120.9118.1

117.0

115.6

Flood Data 11

Table 3. Elevations of peak stages in the Sacramento River and Butte Basin, 1 980-86-Continued

Site designation

Ord Ferry, left bank ...............6............................................

11390140 (site 7) AngelSlough at Ord Ferry Road

8.............................................

9.............................................

10...........................................

11...........................................

12...........................................

13...........................................

W-33,SR-81.. ........................

TP-61.....................................W-49,SR-80..........................W-34, milepost 9. ..................Hawaiian Gardens .................Levee protection site .............

P-7, Parrot plug .....................P-7B.......................................1 1388800 Sacramento River

at Goose Lake PumpP-7B .................................

W-44, Sidd's Landing............Bertopelli Ranch. ...................

TP-59, side levee:Shoreward........................Streamward......................

W-35, Reference Y.... ............20, End levee, left bank.........

W-36, Road 48.......... .............E-8 .........................................W-45 ......................................

E-7. ........................................E-6 .........................................E-5 .........................................E-4 .........................................X-171.7:

Left bank.. ........................Right bank .......................

E-3 .........................................E-2 .........................................X-169.9..................................E-l.........................................

Type ofcifp

HWMCSG

SGSCSG

CSG

CSG

CSG

CSG

CSG

HWM

HWMHWMHWMHWMHWM

CSGHWM

SGS

HWMHWM

HWMHWM

HWMCSG

HWMHWMHWM

HWMHWMHWMHWM

HWMHWM

HWMHWMHWMHWM

Rivermile or latitude,


longitude February

184.139C 37'44",121 C 56'16"

~30C 37'34"121 C 56'53"39C 37'29"121 C 57'14"

39C 37'20"121 C 57'47"39C 37'09:,121 C 58'30"39 C 37'28",121 C 58'51'39 C 36'13",121 C 58'35"

182.1

181.9181.5180.9179.9179.0

._178.7

178.7

178.0177.8

177.0177.0

176.939C 32'01",121 C 58'12"

176.3175.5174.1

174.0173.0172.1171.9

171.7171.7

171.2170.3169.9169.5

114.4111.9

112.8114.1

110.6

112.1

113.6

114.0

110.2

110.7

__

107.2106.5

~

._

--

101.9100.5

«--

99.099.6

98.599.097.8

97.396.795.694.6

~

93.692.1

1981December

110.9

111.8113.8

110.6

111.5

112.8

113.2

108.7

109.3

107.8

105.7105.3103.7

102.6

99.898.8

~

98.298.5

97.298.596.3

95.495.193.993.2

93.192.0

90.290.189.8

January

115.2__

113.2115.0

114.0

112.6

114.1

114.8

__

111.4

110.0

108.1107.4106.8

--

104.2101.0

-

100.099.4

99.1

98.1

97.897.496.0

94.894.5

__92.8

92.0

1983March

115.0

113.81154

115.0

114.8

114.8

116.1

113.4

112.7

111.3110.2108.9108.4108.2

107.2~

--

105.7103.5

101.2100.4

101.4100.1

100.6

99.8

99.199.097.697.3

97.096.4

_94.6~

94.0

December

113.2

113.3114.6

113.4

112.4

113.7

114.6

111.3

111.0

_

107.3106.7

105.0105.5

~

104.5101.9

~~

101.0~

99.3

98.0

97.596.595.895.2

94.994.3

_92.592.091.5

1986February

..114.1

114.0115.0

114.5

114.0

114.3

__

112.3

111.6

110.0108.8108.1107.1

~

106.9~

105.7

104.7~

~~

101.2101.0

100.2

98.8

98.897.997.096.2

96.196.0

_93.9

92.3


Table 3. Elevations of peak stages in the Sacramento River and Butte Basin, 1980-86-Conf/nued

Site designation_, f Rivermile Type of . . 4 .

J . or latitude, site


longitude February1981

December January1983

March December1986

February

11389000 Sacramento River atButte City, left bank,....,...

25, Butte City, right bank .....Princeton Ferry ......................16...........................................

16A................. .......................

18...........................................

21 ...........................................

22...........................................

26...........................................

27...........................................

28...........................................

29. ..........................................

30

30A........................................

32...........................................

33, Butte Creek atGridley Road ...................

34

34A........................................

37, Moulton Weir ..................37.5........................................

38...........................................

39

40...........................................

41...........................................

41.5........................................

42.7........................................11389470 Colusa Weir

near Colusa ......................

SGSCSGHWMCSG

CSG

CSG

CSG

CSG

CSG

CSG

CSG

CSG

CSG

CSG

CSG

CSGCSG

CSG

CSGCSG

CSG

CSG

CSG

CSG

CSG

CSG

SGS

168.6168.5164.339°33'04",

121°53'53"

39°33'04",121°53'47"39°32'49"*J 7 *J ** ~.x 9121°54'07"39°31'20"121°57'43"39°31'20" J S fc/ A 4*\J y121°57'23"39°25'12",121°56'24"

39°25'12",

39°25'12",121°54'16"39°25'12"+J S 4**J If* 9121°53'29"39°25'10" J S 4**J i\J 9121°53'49"39°25'10",121°53'47"

39°21'44",121°54'09"

~39°21'44",121°53'01"39°21'44",121°52'46"

158.139°19'43",121°52'51"39°18'41"121°57'43'39°18'23",121°52'56'39°18'03"121°55'53"

39°15'13"121°53'25"39°14'48"121°57'14"

147.4

146.0

90.289.5--__

_

__

94.0

93.6

72.9

73.1

72.0

72.1

71.8

71.6

64.1

64.263.7

63.8

72.261.4

61.4

61.0

61.2

60.5

60.7

69.5

64.5

88.487.4 _

__

_

92.8

92.9

71.0

72.8

71.8

72.0

71.4

~

63.8

63.762.3

62.1

70.459.7

_.

57.5

__

56.5

56.7

68.5

63.9

90.790.287.0

__

98.8

98.5

95.8

95.3

73.6

74.0

72.2

_

..

~

65.3

64.964.4

64.1

__60.7

..

59.4

__

594fc/,X *~

93.092.489.5

100.1

100.1

__

96.8

96.8

74.4

74.5

72.9

72.0

71.9

~

66.2

66.1

73.964.5

64.3

_

64.3

63.9

64.0

71.1

66.1

90.6~ _

_

98.0

94.8

94.9

73.6

74.1

72.1

72.2

72.0

65.2

64.7

64.7

70.861.4

_.

- .

_

60.3

61.6

70.1

65.3

92.0

88.199.1

_

__

96.5

__

75.0

__

__

--

__

_63.9

63.8

..

63.8

63.1

63.4

70.4

65.4

Flood Data 13

Table 3. Elevations of peak stages in the Sacramento River and Butte Basin, 1980-06-Continued

Site designation Type of site

Elevation, in feet above sea levelRiver mileor latitude, ~T980 1981 1983 1986 longitude February December January March December February

11389500 Sacramento River SGS at Colusa................................44........................................... CSG

11390370 (site 45) ButteSlough near outfall................ SGS46. Butte Slough atMawson Bridge..................... CSG47. Sutler Bypass atLong Bridge........................... CSG

143.3

39° 12'54", 121°54'09"

138.2

63.6

60.4

60.4

59.3

50.5

63.0

56.4

56.1

55.2

47.3

59.3

59.1

58.4

49.8

65.6

63.7

63.6

62.7

53.7

64.7

60.3

60.2

59.4

51.1

65.0

62.9

62.7

54.0

pumping plant (11388800), and Butte City (11389000) for the flood of February 18-19,1986, are shown in figure 6.

Peaks at crest-stage gaging stations were docu mented by lines of floating particles of cork that cling to wood sticks placed inside vertical steel pipes with holes to admit water and air.

Peaks at historical high-water-mark sites were determined by level surveys to high-water marks. These marks consist of grass particles, seeds, debris, mud stains, and washlines left at the highest (peak) stage.

FLOODS OF 1980-86

Water-surface elevation and floodflow data were collected in the study reach during floods of February 1980, December 1981, January, March, and Decem ber 1983, and February 1986. Peak flows for the floods in the Sacramento River at Butte City ranged from 102,000 to 157,000 ft3/s (table 1). Flooding did not occur between 1987 and 1990.

Tropical storms that began in January 1980 brought heavy rainfall at elevations as high as 9,000 ft in the mountains of northern California, which re sulted in snowmelt and excessive runoff. Butte Basin was flooded during February 19-24, 1980. The peak flow of the river at Butte City was 124,000 ft3/s.

Runoff during the 1982 water year was 151 percent of the 1951-80 median based on represen tative streamflow records (Fogelman and others,

120

_i 116 £a 112 2 £108

I 104

ffi 100z z 96

- Peak 115.6 feet at 2200 hours, February18 ORD FERRY (11388700)

Peak 105.7 feet at 2400 hours, February 18 GOOSE LAKE PUMPING IN 8 PLANT (11388800)

-/cPeak 94.9 feet at 0600 hours, February BUTTE CITY (1 1389000)

15 16 17 18 19 20 21 22 23 24 25 FEBRUARY 1986

Figure 6. Selected peak stages of the Sacramento River, February 1986.

1983) for an area that includes Butte Basin and the Sacramento River. Minor flooding in Butte Basin occurred December 21-22, 1981, concurrent with the peak flow at Butte City of 102,000 ft3/s.

Runoff during the 1983 water year ranged from 174 to 228 percent of the median based on represent ative streamflow records in the area (Fogelman and others, 1984). Peak flows were measured during Jan uary and March 1983. Maximum flows for the 1983 water year occurred on March 2, 1983, when the peak flow in the river at Butte City was 157,000 f^/s. The stage at this flow was 93.0 ft where the elevation of the top of the left bank levee is 98.0 ft. Flooding of Butte Basin continued for 20 days, February 28 to March 19, 1983. Flows were not measured on State Highway 162 during the flood of December 25-28, 1983, but peak stages were documented.


Heavy rains fell on northern and Central California for more than a week in February 1986, resulting in extensive flooding. The flood of Februt^ry 1986 had a longer duration than the flood of March 1983, but the peak flow of 145,000 ft3/s in the Sacramento River at Butte City was less. Flooding in Butte Basin at State Highway 162 began on February 15 and continued until March 1, when flows on the flood plain were confined to the overflow channels.

The California Department of Water Resources, the California State Reclamation Board, and the U.S. Army Corps of Engineers developed a flood-control plan during 1980-87 which recommended that Sacramento River flows above a designated amount should enter Butte Basin at locations of historical overbank flow (Clifford L. Gregory, Jr., California Department of Water Resources, written commun., 1990). The three selected major overflow sites to Butte Basin are at rivermiles 190.8, 186.5, and 179.0 (fig. 2). During 1986, overbank flow eroded two scour holes at the flood relief structure upstream from Murphy Slough near rivermile 190.8. More than 12,000 tons of rock and 500,000 yd3 of soil were required to fill the holes (Clifford L. Gregory, Jr., California Department of Water Resources, written commun., 1990). A part of the 1980-87 flood-control plan included a flood-relief structure to replace a raised roadway known as the Parrott Plug near rivermile 179 (Woodward-Clyde, 1986). Construction was completed in 1988 (fig. 2).

CHANNEL GEOMETRY

Cross sections at fixed monumented locations of the Sacramento River were surveyed annually during 1981-84 and 1986-90 to determine the extent of channel migration and scour caused by channel erosion. These surveys supplement surveys made between 1971 and 1980. Coordinate data for six cross sections between rivermiles 193.7 near Big Chico Creek and 183.3 near Ordbend (fig. 7 and table 4, at back of report) were obtained by level surveys and fathometer. All elevations for these cross sections are referenced to sea-level datum. Because initial points (station 0 ft) on the left bank were the same for all surveys at each cross section, the surveys can be used to indicate changes in channel geometry and location. Cross sections are located where bank protection (rock riprap) was placed before 1980 (sections 1, 2,4,

and 6), where rock riprap was placed in 1988 (section 3), and where no riprap has been placed (section 5).

SUMMARY

Peak flows and peak stages of floods were measured and channel cross sections were surveyed at sites along the Sacramento River and in Butte Basin during 1980-90 to document magnitudes of flooding and channel changes. The study reach extends from rivermile 200 near Hamilton City to rivermile 134 near Meridian.

Levees on the left bank of the Sacramento River between rivermile 176 near Glenn and rivermile 134 near Meridian prevent flows from entering Butte Basin except controlled overbank flow at Moulton and Colusa Weirs. When river flows exceed about 80,000 cubic feet per second, flows begin to inundate Butte Basin between rivermile 194 near Chico and rivermile 176 near Glenn by overtopping the riverbank and by entering sloughs and swales near the river channel. Overflow into Butte Basin between Chico and Glenn decreases the total flow of the river entering the leveed channel downstream from Glenn. Overland flow in Butte Basin was about one-third of the total peak flow of 225,000 cubic feet per second measured at the latitude of Butte City on January 24, 1970.

Data were collected in the study reach during floods of February 1980, December 1981, January, March, and December 1983, and February 1986. These data were collected at about 70 sites for each flood. Peak flows in the Sacramento River at Butte City ranged from 102,000 to 157,000 cubic feet per second.

Flows were measured at the Sacramento River at Butte City, Angel Slough at Ord Ferry Road, and 15 bridges and 11 road-overflow sites on State Highway 162. Peak stages were documented at streamflow gaging stations, crest-stage gaging stations, and historical high-water-mark sites. Six cross sections of the Sacramento River between rivermiles 193.7 and 183.3 were surveyed annually during calendar years 1981-84 and 1986-90 to determine the extent of channel migration and scour caused by channel erosion.

Summary 15

References Cited

Blodgett, J.C., 1981, Flood data for the Sacramento River and Butte Basin, 1875 to 1978, Sacramento Valley, California: U.S. Geological Survey Open-File Report 80-971, 193 p.

Blodgett, J.C., and Pearce, V.F., 1971, Determination of floodflow of the Sacramento River at Butte City, California, January 1970: U.S. Geological Survey open-file report, 29 p.

Blodgett, J.C., and Stiehr, P.L., 1974, Hydraulic analysis of floodflows in Butte Basin at State Highway 162, Glenn and Butte Counties, California: U.S. Geological Survey open-file report, 48 p.

Fogelman, R.P., Mullen, J.R., Shelton, W.F., and Simpson, R.G., 1983, Water resources data-California, water year 1982. Volume 4. Northern Central Valley basins and the Great Basin from Honey Lake basin to Oregon State line: U.S. Geological Survey Water- Data Report CA-82-4, 319 p.

Fogelman, R.P., Mullen, J.R., Shelton, W.F., Simpson, R.G., and Grillo, D.A., 1984, Water resources data- California, water year 1983. Volume 4. Northern Central Valley basins and the Great Basin from Honey Lake basin to Oregon State line: U.S. Geological Survey Water-Data Report CA-83-4, 291 p.

Simpson, R.G., 1978, Flood hydrology of Butte Basin, 1973-77 water years, Sacramento Valley, California: U.S. Geological Survey Water-Resources Investigations Report 78-86, 69 p.

U.S. Army Corps of Engineers, 1984, Sacramento River, California, Aerial Atlas: Corps of Engineers, Sacramento, California, 41 p.

U.S. Army Corps of Engineers, 1991, Hydraulic design of flood control channels: U.S. Army Corps of Engineers, Engineer Manual 1110-2-1601, 4 chapters [variously paged].

Woodward-Clyde, 1986, Environmental impact report for the Butte Basin overflow area: Woodward-Clyde, Consultants, 106 p.


39°42'30"

39°40'

193.7-

121°58'

I

EXPLANATION

RIVERMILE - Represents distance from mouth

CROSS SECTION WITH RIVERMILE

121°56'

DIRECTION OF FLOW

SACRAMENTO RIVER FLOOD CONTROL PROJECT LEVEE

0 2,500 FEET I I I I II I 1 I

0 800 METERS

Figure 7. Locations of cross sections that are surveyed annually.

Figure 7 17

122°00' 121°58'

39°40'

39°37'30" ~

EXPLANATION

STREAMFLOW GAGING STATION AND NUMBER

RIVERMILE - Represents distance from mouth and based on USGS topographic maps dated 1949, photorevised 1969

186.5 (5 CROSS SECTION WITH RIVERMILE

DIRECTION OF FLOW

SACRAMENTO RIVER FLOOD CONTROL PROJECT LEVEE

Road

800 METERS

Figure?. Continued.


Table 4. Coordinate data for six cross sections of the Sacramento River

[All values are in feet. Elevation in feet above sea level. See figure 7 for location of cross sections]

Distance from Eleva- Distance from Eleva- Distance from initial point tion initial point tion initial point

Eleva- Distance from tion initial point

Eleva- Distance from Eleva tion initial point tion

Rivermile 193.7. October 1981--Cross section 10

10132134

08

203858728588

0148172204234310313328336

127.1127.0127.2123.9117.9

137.6137.0132.9128.9128.1129.0129.2128.8

125.0124.0121.8119.6124.3125.0125.0109.0102.8

35436075

101

9494

104125155173242307

352376392416436452464472480

114.5106.3101.5100.0100.9

Rivermile 192.8.122.8112.1104.699.989.192.197.1

101.1

Rivermile 190.8.102.498.597.497.298.099.597.297.595.5

132181217241296

September337376397409419458484519

September496517601689697712752785804

101.4104.5106.8109.3111.1

321476548616699

114.5120.0120.3118.5119.9

710730755

121.8124.8124.8

198 l--Cross section 2105.1107.1109.1109.6112.2115.2122.1121.9

579620708726787794827841

123.1122.4122.4124.5123.4122.8123.3124.3

863871882920936

1,0071,031

123.7124.4124.2126.2127.8128.5129.6

1981 --Cross section 396.796.6

100.0106.5106.7109.1110.0114.1115.9

874928954990

1,0181,0431,0861,0951,108

114.5117,7117.0116.1115.3121.7120.2120.6116.6

1,1491,1991,2621,3011,3721,4561,5181,5201,540

119.5121.8122.3121.0120.3123.1123.7124.4123.5

Rivermile 189.3. Ausust 1981~Cross section 40

40548897

114130137

125.124.6123.8105.3101.3101.399.9

100.1

147173203237260293310346

97.896.898.196.296.598.398.5

101.3

363371413600610620774780

103.3105.2107.3111.3115.3113.3109.9109.1

804858923932939

1,0501,1231158

119.0119.2115.0117.4115.7115.0117.6117.6

1,1911,2181,2271,2331,260

118.6116.7116.8117.9118.3

Table 4 19

Table 4. Coordinate data for six cross sections of the Sacramento River-Continued

Distance from Eleva- Distance from Eleva- Distance from Eleva- Distance from initial point tion initial point tion initial point tion initial point

0496069

105169228240255264286309

018326373

106

01324303245

06

2034517579848996

119.5119.2118.9112.0113.3110.6111.6103.2110.197.794.794.5

112.4113.0112.092.188.080.0

127.1127.2122.1116.4115.6109.3

137.5137.3132.9129.2128.0129.1129.5114.0104.4103.6

327394434488502528555605685726748757

166186249262305338

546570919497

97101105108116122130131135137

Rivermile 186.595.289.093.297.397.297.797.795.497.296.797.797.7

Rivermile 183.86.285.687.387.389.790.0

Rivermile 193.104.497.897.998.298.398.1

Rivermile 192.8103.599.299.297.096.594.092.593.492.091.3


. September 1981 -Cross section 5772811975

1,1011,1721,2331,2531,2691,3291,3441,3631,373

3. August398477500627634648

7. Januarv128136158164204208

100.4103.2110.4108.5111.5111.3114.2114.8113.6110.0110.8114.1

1,4021,4291,4511,4721,4861,5471,6181,7101,8011,8191,8581,913

108.9109.8116.6116.1111.6114.1115.4114.2112.0113.8114.7114.2

1,9632,0332,1272,1522,2592,2842,3032,373

113.5115.7113.3107.0107.1111.4112.4114.9

198 1-Cross Section 691.994.594.896.097.896.2

723786834854883898

96.395.7

100.796.6

102.8102.6

939961993

1,0571,122

106.0106.6107.4108.7109.6

1982-Cross section 1100.1100.9103.3103.8105.0106.1

269276323327370372

111.6111.5114.2114.3116.7117.0

414429469710730

118.0118.4120.1122.1124.8

. September 1982 Cross section 2156160190210245288353429439455

92.292.294.696.198.0

100.0103.5109.3114.0115.4

475507559668705799945

1,0211,0651,156

122.7122.4123.2122.3124.2122.6128.3129.7130.1129.9

1,2921,3551,3731,4111,4291,4611,4861,5471,6201,741

129.0126.5127.6124.3125.4123.7125.9126.0126.5132.5


Table 4. Coordinate data for six cross sections of the Sacramento River-Conf/nued

Distance from Eleva- Distance from Eleva- Distance from Eleva- Distance from initial point tion initial point tion initial point tion initial point

0186222261300307312315326

040508994

111

021

135202204216229231255293352392

01626364959

125.0123.9123.5118.8123.9124.2116.7112 A108.5

125.0124.6124.7106.2102.9102.3

119.1119.1110.5113.2113.2104.9100.899.196.994.694.692.7

112.2112.8111.9111.1100.293.7

334344363380389409428448455

122173187233269297

414426443459559603745799869909928940

6581

102112153187

Rivermile 190.8106.6104.7100.398.497.797.196.295.895.9

Rivermile 189100.996.897.293.696.996.3

Rivermile 186.597.798.197.298.398.297.697.997.395.395.391.290.1

Rivermile 18385.682.076.477.480.779.0


. September 1982-Cross section 3465473483487494506531566588

.3. August324407422492613623

96.496.196.495.396.796.896.699.0

101.0

602612617632738839924

1,015

102.4105.5108.5112.7111.6116.0114.7116.4

1,0821,1511,2301,2881,3631,3941,4451,499

119.1120.2120.8118.6120.1121.2122.0123.4

1982-Cross section 497.8

104.1106.0110.8113.0116.1

631773773794813824

113.4110.4111.5111.1120.2118.3

1,0471,1241,2091,2331,244

115.7117.8118.8117.1118.5

. September 1982-Cross section 5967972990

1,0001,0781,1111,1441,2531,3461,4481,4601,483

.3. August200217242297346420

94.696.696.796.9

101.4104.3110.5111.5114.8110.2111.9111.8

1,5151,5601,5731,5851,6591,6891,7171,8811,8951,9121,9352,013

108.1112.4111.0113.6116.6114.5115.5111.3114.6116.0114.6115.8

2,0252,0732,1612,2172,2372,3522,3752,432

113.4115.8116.4114.3108.3106.6110.4115.1

1982-Cross section 677.877.980.782.986.889.4

440614734865967

1,000

93.696.696.197.7

103.0102.2

1,0281,0471,0801,0921,1461,191

105.8107.3105.6109.2109.0110.2

Table 4 21





Rivermile 193.7. Mav 1983-Cross section 10

10132225293338

05

1837546982

064

119194261273303

127.1127.0127.2121.5119.1117.3114.1110.2

137.6137.6133.1128.9128.4129.0115.9

124.8124.0124.2123.9123.7120.6110.0

43495664728292

102

87124141163220231237

313347373425431497538

107.8103.799.595.493.694.595.596.9

Rivermile 192.8.100.890.893.093.897.899.097.8

Rivermile 190.8.105.097.895.695.895.095.395.9

114128144162182204228254

September244267289370395462472

September571601651661881954

1,034

97.8100.0101.1103.9106.8108.4110.5112.0

1983-Cross99.899.6

100.2104.8106.0113.6115.8

1983--Cross95.0

101.0108.0109.9111.4113.6118.3

282312342372402432456548

section 2472537616657707744773

section 31,0411,1101,1531,2141,3001,4001,479

113.7115.3116.4117.4118.7120.2121.5122.5

122.7122.5124.5123.7125.8125.7123.7

121.2122.4120.8123.7121.1122.1121.6

616699710730

842907936

1,150

1,5581,5641,6581,6971,7271,7401,785

118.5119.9121.8124.8

128.0128.5129.8130.0

120.4122.7120.5119.8122.9121.9121.4

Rivermile 189.3. Aueust 1983--Cross section 40

40528590

120131

0135093

146160165171176

124.9124.6124.5108.3104.6100.7100.9

119.0118.7113.5111.1113.4112.2108.9107.1104.4

149158225255280296320

214219260212344372393541718

99.397.393.194.695.593.592.3

Rivermile 186.5.102.0100.394.696.997.097.997.597.497.5

340375432452555627672

September753863948

1,2351,3131,5051,6351,6581,671

93.8100.8105.8108.2111.9116.8115.6

717781791821892951

1,081

111.8112.5115.7120.0119.8116.4121.3

1,1281,2391,2871,3171,385

120.9118.8117.8120.6123.1

1983-Cross section 5100.6100.098.698.495.493.087.489.488.9

1,7011,7241,7291,7471,7671,8651,8931,9161,969

96.799.4

102.9106.6114.8114.1115.8115.9112.8

2,0212,0842,0252,2232,2702,3492,3622,385

114.2116.8116.8106.9104.1106.1110.1110.4


Table 4. Coordinate data for six cross sections of the Sacramento River-Con//ni/eaf

Distance from Eleva- Distance from Eieva- Distance from initial point tion initial point tion initial point

0162531545876

018243040

0193866718288

050

117214249264282

030558490

103112123143

112.4112.9111.8111.994.992.884.9

127.7127.1123.4118.9110.0

137.5132.9128.9129.3129.1115.4105.3

123.5124.0124.3123.9124.0122.9111.3

124.9124.5124.3107.9103.0101.5100.5101.097.1

90120180200226250305

557190

113135

101119132141199251265

291326356375404436455

169205226244256282294311333

Rivermile 183.76.180.083.381.483.784.287.9

Rivermile 193.7,108.9101.194.396.097.9

Rivermile 192.8.104.095.692.494.298.0

101.5101.4

Rivermile 190.8.109.5103.696.395.497.296.995.6

Rivermile 189.96.194.094.294.795.594.593.193.695.2



3. August 1983-Cross section 6315344380435465498523

. December143175214233251

September279310348400407430461

September465484532576602626653

89.589.990.992.794.896.195.2

644673698723781833888

96.995.993.993.391.991.291.9

1

939949,050

1,088111

,111,227,237

93.295.9

107.6106.3109.3110.3110.1

1984~Cross section 197.1

100.5104.9106.6107.1

1984-Cross100.4102.9105.3108.3112.0111.8112.3

278324371401493

section 2469474479584683814902

111.2113.8115.9118.8123.3

115.3118.1120.5122.0123.3127.1124.2

111

619665720

962,014,044,329

119.8121.8124.9

129.2130.4131.1129.1

1984 Cross section 395.797.194.193.294.997.1

103.0

673694715823932

1,0221,155

106.0107.1109.4115.7119.3121.0122.3

11111

,222,282,397,512,624

123.1121.2122.2121.3121.9

3. August 1984 Cross section 4359374390417444456601623664

97.098.5

100.5102.7104.5107.8114.8117.5113.4

715769787791812823905925

1,064

114.3112.1113.0112.0119.9120.7120.4114.8118.4

11111

,082,144,266,334,390

120.6120.8119.6119.0120.0

Table 4 23



0152395

152161182201234246267272

02736576778899497

08

131721

08

20314452596983

119.0119.1114.6112.3114.7114.6108.2102.699.597.695.998.5

112.3111.9113.194.889.286.079.579.176.7

127.0126.8127.2125.8123.0

137.3136.9133.0131.8131.9127.8125.2120.6116.8

278303308313316321362367373409511543

137144148153164181188218231

2837455779

8595

119128135141146160172

Rivermile 186.594.897.7

100.599.898.6

100.8100.398.599.499.098.999.6

Rivermile 18380.081.985.283.887.880.380.586.286.7

Rivermile 193.7118.4114.8108.6106.398.3

Rivermile 192.8113.8107.8103.098.592.889.888.888.991.6

, September563576583591619629650714732743779944



1984-Cross section 599.299.298.599.3

100.098.698.799.699.2

100.199.9

102.7

.3. August 1984-Cross242248277317356421512634641

, September102109118155197

. September185197214227270310404435453

87.988.889.590.191.394.696.597.895.6

1,0911,2631,2981,3411,3891,4461,4751,5001,5871,6241,6571,728

section 6667684704735762786832857884

102.799.999.198.896.994.594.292.391.792.293.093.1

92.992.592.491.590.389.990.790.991.4

1,7581,7731,8181,8261,8511,8952,0142,1612,1892,3462,3602,385

912954

1,0361,0541,0851,0981,1031,1091,227

96.197.499.6

102.8112.2116.8115.7116.8105.8107.1109.8112.7

92.795.7

103.8107.9106.9106.9109.5109.3109.0

1986-Cross section 193.593.894.098.8

106.4

227275291316398

110.6112.3113.3114.7118.8

470493532617714

123.4123.2123.8119.8124.0

1986-Cross section 293.193.893.793.596.3

100.8104.3104.8105.6

471481485500523568619667728

107.5108.8109.8113.7117.1119.2121.3122.6124.3

794847871887912942

124.5123.1129.1125.5125.7131.0


Table 4. Coordinate data for six cross sections of the Sacramento River-Con//nued


01458

103108109116125129

124.0125.1124.4124.1124.3118.4113.3109.2108.0

141153170198203216232241267

Rivermile 190.8.103.5102.099.495.194.995.396.196.196.8

September271282331355370379369406413



1986-Cross section 397.096.695.094.694.894.595.295.695.8

434459474547626678738839929

98.8102.7108.0111.6114.6116.9117.1117.0121.8

1,0141,1301,1511,1841,3721,502

122.8118.0119.9122.8123.8123.2


36495262758898

04997

220284414460572673

0172328374655617179

124.8124.5124.4124.2118.4111.5106.6101.6

119.4119.0114.8114.6101.5107.4106.2102.0102.2

112.4112.9112.0112.2111.5106.1100.394.082.583.1

106118126146153176211233

735789919

1,0191,0871,2071,2451,3201,402

84869097

108118135157167171

101.099.698.498.698.896.496.696.8

Rivermile 186.5.101.4101.6101.2101.6105.8104.3112.6112.7110.5

Rivermile 183.3.83.080.578.077.178.379.881.283.084.286.0

248260265282290307325350

September1,4471,5161,6241,7041,7591,8781,9071,9551,967

September177184197254354394416456535622

96.294.994.893.992.894.196.498.2

396403417440455467487553

103.3103.6103.0104.3104.9104.8106.5110.5

603613618797

114.6116.5116.2115.0

1986-Cross section 5109.2105.2101.298.497.095.295.896.496.2

2,0302,0622,1022,1522,1642,1722,2202,2362,297

97.298.6

101.5104.7109.2109.4107.5104.8109.1

2,3012,3402,3772,3872,3922,466

109.0105.4104.5111.3111.7116.0

1986--Cross section 685.386.989.192.293.995.796.997.497.696.6

632662675691708727778840898920

94.793.092.592.291.991.390.990.390.691.0

947965989

1,0041,0631,0911,1131,1241,1771,252

91.591.093.595.2

102.7106.3110.0110.1110.0110.5


133235

127.0127.6118.8115.4

476277

124

104.798.492.695.4

148180204240

97.9102.4105.4108.9

260291341412

111.9112.4115.4119.8

493630708750

123.3119.1124.2124.8

Table 4 25


Distance from Eleva- Distance from Eleva- initial point tion initial point tion

Distance from Eleva- Distance from initial point tion initial point


Rivermile 192.8. Seotember 1987-Cross section 208

20254461

137.4137.0133.0132.2131.3125.2

8095

107117124132

114.1106.1104.199.094.191.1

140150180220276343

89.392.094.196.199.1

103.2

384440478490504512

104.1105.0107.1109.0108.1109.0

522681868

1,0601,190

114.1123.9126.9131.6129.9


90106109123128133

02452648489

113

01964

183204240251

0365868737892

124.1124.2124.2117.2110.8108.3102.0

124.6124.5124.3117.1106.8101.7100.7

119.1119.1114.2114.4114.5100.9100.9

112 .4111.894.089.591.084.077.0

155187216265295326358

126166192212242260282

264430443611669

1,1591,234

104114120130134140157

98.395.596.393.893.391.893.3

Rivermile99.599.797.296.795.495.794.1

Rivermile106.3105.3103.099.8

101.2101.7101.5

Rivermile79.080.083.587.084.886.089.0

385409426443474484541

189.3. August304322350371386412441

186.5. August1,2761,3021,4851,6221,6421,6651,730

183.3. August175182210242267462631

94.398.3

103.3105.3106.3108.2112.2

651740871918981

1,0171,093

114.8116.9117.5121.1123.0121.9117.2

1,1671,3311,497

121.7123.4123.2

1987--Cross section 493.795.296.799.7

101.7104.0103.2

474494549610617702747

104.8106.8111.1116.5116.5114.2116.1

784794823

112.5115.4120.1

1987-Cross section 5111.7111.7108.0101.099.098.596.5

1,7951,8581,9001,9291,9631,9802,032

96.095.094.595.095.596.597.0

2,0682,1092,1392,2232,3732,4382,502

98.099.0

101.0106.7110.4104.3111.7

1987-Cross section 691.090.591.593.094.098.095.0

661722760810840880930

94.092.591.090.090.290.591.3

9691,0001,0201,0761,1161,236

92.293.095.0

102.7108.7110.1


Table 4. Coordinate data for six cross sections of the Sacramento River~Con//ni/ed


01323374252

06

2044627884

094

107108120130147

0355265838999

0206485

204240251

127.0127.6123.4116.1109.8107.1

137.4137.2133.0131.2123.7115.0111.2

124.2124.0124.0118.0109.2104.1100.2

124.7124.5124.2116.5107.7103.0102.6

119.1119.1114.2114.2114.5100.9100.9

647687

100123145

100124136154160171197

167188216230246264277

108114121131152168189

264430611669

1,1591,2341,244

Rivermile102.196.193.692.694.196.1

Rivermile110.5105.0101.089.589.495.098.0

Rivermile97.195.395.194.593.192.792.8

Rivermile101.299.699.998.698.696.694.2

Rivermile106.3105.399.8

101.2101.7101.5112.8

Distance from Eleva- Distance from Eleva- Distance from Eleva- initial point tion initial point tion initial point tion

193.7. August186221233242270296

192.8. August234270324366411428454

190.8. August294306317329338362380

189.3. August203212226237245255265

186.5. August1,3331,6061,6861,7101,7251,7601,772

1988-Cross section 1101.1105.1106.1108.1110.1111.1

320350467492527581

112.6116.1123.4123.2124.0122.0

636657699750

119.3121.6124.1124.8

1988-Cross section 299.0

101.0102.0104.0104.5105.3105.0

479485515606693907932

107.2108,0115.0121.0124.2126.0130.4

942992

1,042

133.5128.7131.6

1988-Cross section 392.392.391.992.091.693.092.6

391406420435470494746

93.196.6

100.1103.1109.1111.2117.2

9861,0931,1671,331

122.4117.2121.7123.4

1988. Cross section 495.694.895.695.694.693.894.6

274295318341359383411

93.696.096.699.4

101.6103.6102.6

438468505615701791820

103.6104.8107.6116.2114.3115.3120.0

1988-Cross section 5110.8101.799.898.198.196.896.6

1,8181,8601,8821,9161,9802,0002,053

96.095.895.094.695.195.197.0

2,1032,1632,2012,2932,4232,502

98.1102.0105.6110.5105.0111.7

Table 4 27





Rivermile 183.3. Aueust 1988-Cross section 60

3437566696

128

014303545

08

203543799499

112.4111.9112.494.775.274.777.7

127.0127.9118.3115.4103.9

137.4137.0133.0131.7132.0114.5104.7104.0

159172190210250300363

728095

110140

104109115120125129135138

79.282.282.782.289.490.092.7

Rivermile 193.7.92.492.493.494.498.4

Rivermile 192.8.102.599.596.592.589.588.888.890.5

383453587615645700723

September175190202216253

September145170187200203232265319

Rivermile 190.8. Seotember0

5285

134144153161177

034508999

110

124.4124.4124.0107.6100.6102.0101.197.6

124.7124.6124.5105.7100.7100.7

182195212225246259275300

136172193202208214

92.992.893.792.992.992.691.691.3

Rivermile 189.3.97.996.794.593.593.594.3

325338356371386395400406

September245252267281303335

94.698.296.995.692.089.689.1

747820833868920

1,0021,027

89.189.689.290.191.192.295.6

1,0681,0781,1171,1671,244

99.7103.2109.3109.7110.2

1989--Cross section 1102.4104.7105.4108.0110.9

285331341169493

112.4113.9115.4123.5123.2

531647676

123.9119.8123.3

1989-Cross section 293.096.097.597.898.9

100.5100.5103.0

365396418449457473489499

103.5104.9104.5105.0105.5108.0110.4114.4

524694925939967

117.8124.4126.4131.2130.3

1989-Cross section 391.191.692.694.197.699.699.6

102.1

416428433551634721863946

104.6106.4107.6112.2117.3116.4121.4121.4

1,0131,0511,1521,252

123.6117.6117.2122.8

1989-Cross section 495.395.1

930793.192.294.4

367415456496619706

98.0102.6102.5105.7116.4114.1

772794854

117.6115.8120.0


Table 4. Coordinate data for six cross sections of the Sacramento River-Conflnued


Distance from Eleva- Distance from initial point tion initial point


Rivermile 186.5. Seotember 1989 Cross section 50

206485

204240251264430

119.1119,1114.2114.2114.5100.9100.9106.3105.3

611669

1,1591,2341,2781,2941,4581,6431,693

99.8101.2101.7101.5109.2112.9109.2100.298.7

1,7261,7421,7921,8031,8321,8611,8691,8861,905

97.897.095.895.694.995.395.095.594.9

1,9291,9782,0152,0562,1062,1362,1652,1802,230

96.096.997.497.698.8

100.5102.6108.0109.0

2,3042,3262,3802,3882,3912,4292,4722,501

108.8105.7105.1111.2111.7115.8117.6114.9


243760702£8189

107115

0163550

08

2035

032

137152126

112.4112.0112.892.979.476.476.278.480.782.9

127.1127.0115.0103.5

137.4137.0133.0131.7

124.3124.1108.0103.5101.0

125130140146157170178190244302

7490

113173

437994

108

190200215234250

86.986.983.183.487.489.389.990.490.991.4

Rivermile100.092.594.0

102.0

Rivermile131.0113.9106.9105.9

Rivermile98.595.592.893.593.0

342385403473560617624640670683

193.7. August212220296336

192.8. August121132158180

190.8. August267283305347390

92.895.499.498.497.197.094.893.992.491.9

709728760770782827844856915967

91.290.489.989.790.189.990.390.291.992.9

9971,0441,1181,1451,2351,252

93.997.5

109.4109.8109.2110.6

1990-Cross section 1106.5108.3112.5115.0

493529650674

123.2124.0119.7123.4

1990-Cross section 2101.992.496.498.2

252373415453

101.9104.9104.9106.4

503696941971

113.9124.3131.4130.4

1990--Cross section 390.593.093.592.593.5

410420433440451

94.595.5

102.0103.5106.0

466735996

1,0771,187

108.0116.9123.2116.8122.5

Table 4 29



03652879298

0206485

204240251264430

0386065707686

124.8124.6124.2106.2101.0101.2

119.1119.1114.2114.2114.5100.9100.9106.3105.3

112.4111.693.584.383.580.076.5

111124138160193204

611669

1,1591,2341,2911,4551,6341,6841,772

95105120136159171182

Rivermile99.599.898.498.495.295.2

Rivermile99.8

101.2101.7101.5112.8109.0101.097.895.0

Rivermile76.579.079.880.585.783.584.5

Distance from Eleva- Distance from Eleva- Distance from Eleva- initial point tion initial point tion initial point tion

189.3. August214244258284302322

186.5. August1,8131,8371,8591,8831,9081,9351,9681,9822,018

183.3. August197207242262336376441

1990-Cross section 494.895.095.693.793.292.2

337346367382405430

92.597.799.7

101.7102.2102.2

446468488616696786

102.5103.2106.2116.5114.4115.6

1990-Cross section 594.894.694.394.394.093.393.793.496.5

2,0622,0802,0952,1072,1142,1342,1592,1792,304

96.796.697.098.099.0

101.0102.9108.8108.5

2,3712,3872,3922,4112,465

104.8111.0111.7114.5117.5

1990-Cross section 688.089.090.590.592.593.597.8

495583640664684730111

98.098.396.394.391.390.389.6

869960

1,0071,0571,1451,1611,202

89.690.492.894.3

109.7109.7110.6

30 Flood Data for the Sacramento River and Butte Basin, Sacramento Valley, California, 1980-90~GPO 683-399/39010

Documents

FLOOD DATA FOR THE SACRAMENTO RIVER AND BUTTE …FLOOD DATA Floodflows were measured at the following sites (figs. 2 and 3) to define flow distribution: 1. Sacramento River at Butte