1973Water Resources Data

for

Iowa

Part 1. Surface Water Records

Part 2. Water Quality Records

UNITED STATESDEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

Prepared in cooperation with the Iowa Geological Survey and with other State and Federal agencies

CALENDAR FOR WATER YEAR 1973

OCTOBER

S M T W T F S1 2345678 9 10 11 12 13 14

15 16 17 18 19 20 2122 23 24 25 26 27 2829 30 31

1972NOVEMBER

S M T W T F S 1234

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

DECEMBER

S M T W T F S 1 2

3456789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

JANUARY

S M T W T F S1 23456

7 8 9 10 11 12 1314 15 16 17 18 19 2021 22 23 24 25 26 2728 29 30 31

1973 FEBRUARY

S M T W T F S 1 2 3

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

MARCH

S M T W T F S1 2 3

4 5 6 7 8 9 1011 12 13 14 15 16 1718 19 20 21 22 23 2425 26 27 28 29 30 31

APRIL

S M T W T F S1 2345678 9 10 11 12 13 1415 16 17 18 19 20 2122 23 24 25 26 27 2829 30

MAY

5 M T W T F S 12345

6 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31

JUNE

S M T W T F S 1 2

3456789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

JULY

S M T W T F S1 2345678 9 10 11 12 13 1415 16 17 18 19 20 2122 23 24 25 26 27 2829 30 31

AUGUST

S M T W T F S 1234

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

SEPTEMBER

S M T W T F S1

2345678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Water Resources Data

for

Iowa

Part 1. Surface Water Records

Part 2. Water Quality Records

UNITED STATESDEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

Prepared in coopeiation with the Iowa Geological Survey and with other State and Federal agencies

Prepared in cooperation with

Iowa Geological Survey Iowa State Highway Commission Iowa Natural Resources Council

University of Iowa, Institute of Hydraulic Research Iowa State University, Agricultural Experiment Station

Iowa State UniversityLinn County

City of Cedar Rapids City of Des Moines City of Fort Dodge

Corps of Engineers, U.S. Army Environmental Protection Agency

Copies of this report may be obtained fromDistrict Chief, Hater Resources Division

U.S. Geological Survey10U1 Arthur Street

Iowa City, Iowa 52240

April 1974

CONTENTS

Page

List of surface-water stations, in downstream order,for which records are published......................... V

List of water-quality stations, in downstream order,for which records are published......................... X

Introduction................................................. 1Cooperation.................................................. 2Definition of terms.......................................... 3Special network and programs................................. 9Downstream order and station numbers......................... 9Surface-water records

Collection and computation of data......................... 10Accuracy of data........................................... 14Publications............................................... 16Other data available....................................... 16

Mater-quality recordsCollection and examination of data......................... 17Solutes..... ................................................ 18Temperature................................................ 20Sediment................................................... 20Publications............................................... 21

Uydrologic conditions........................................ 21Selected references.......................................... 23Part 1. Surface-water records

Discharge at gaging stations............................... 27Discharge at partial-record stations and

miscellaneous sites................................... 168Low-flow partial-record stations......................... 168Crest-stage partial-record stations...................... 179Measurements made at miscellaneous sites................. 188Supplemental low-flow measurements....................... 189

Discontinued gaging stations............................... 191Part 2, Mater-quality records

Continuing records of chemical quality, watertemperature, and sediment data. ....................... 193

Analyses of samples collected at periodic andmiscellaneous sites................................... 291

Analyses of periodic stations............................ 291Analyses of miscellaneous stations....................... 315Periodic determinations of suspended-sediment

discharge.... ......................................... 327Discontinued water-quality stations........................ 331

Index......... ............................................... 333

III

IV CONTENTS

Page

ILLOSTRATIONS

Figure 1. Map of Iowa showing location of contin- uous-record gaging stations................................ 15

Figure 2. Nap of Iowa shoving location of water- quality stations........................................... 19

Figure 3. Runoff during 1973 water year conpared with mean runoff for period 1931-60 for three representative gaging stations............................. 22

TABLES

Table 1. Factors for conversion of chemical con- stituents in milligrams or micrograms per liter to millieguivalents per liter...................

Table 2. Factors for conversion of sediment con- centration in parts per million to milligrams per liter....... ............................................... 7

Table 3. Degrees Fahrenheit (F) to degreesCelsius (C)............................................... 18

Table 4. Factors for converting English Unitsto International System (SI) Units........................ 25

SURFACE WATER STATIONS, IM DOWNSTREAM ORDER, V FOR WHICH RECORDS ARE PUBLISHED

Page2!JLH!SSISSIPPI_RIVER_fiASIN Hississippi River:

UPPER IOWA RIVER BASINUpper Iowa River at Decorah................................ 29PAINT CREEK BASINPaint Creek at Waterville.................................. 30

Hississippi River at McGregor................................ 31TURKEY RIVER BASINTurkey River at Spillville................................. 32Turkey River at Garber..................................... 33LITTLE MAQUOKETA RIVER BASINLittle Maquoketa River near Durango........................ 34MAQUOKETA RIVER BASINMaquoketa River near Manchester............................ 35

Bear Creek near Moniouth................................. 36Maquoketa River near Maguoketa............................. 37

Mississippi River at Clinton................................. 38WAPSIPINICON RIVER BASINWapsipinicon River near Elma............................... 39Wapsipinicon River at Independence......................... 40Wapsipinicon River near De Witt............................ 41IOWA RIVER BASINIowa River:

East Branch Iowa River near Klemme....................... 42Iowa River near Rowan...................................... 43Iowa River at Marshalltown................................. 44

Timber Creek near Marshalltown........................... 45Richland Creek near Haven................................ 46Salt Creek near Elberon.................................. 47Walnut Creek near Hartwick............................... 48Big Bear Creek at Ladora................................. 49

Iowa River at Marengo...................................... 50Coralville Lake near Coralville............................ 51Iowa River:

Rapid Creek near Iowa City............................... 52Clear Creek near Coralville.............................. 53

Iowa River at Iowa City.................................... 54Ralston Creek at Iowa City............................... 55

South Branch Ralston Creek at Iowa City................ 56English River at Kalona.................................. 57

Iowa River near Lone Tree. ................................. 58Cedar River at Charles City.............................. 59

Little Cedar River near Ionia.......................... 60

VI SURFACE WATER STATIONS, IN DOWNSTREAM ORDERContinued

nER_MISSIS&IPPIJ8IVER_BA!!lContinuedIOWA RIVER BASINContinued Page

Cedar River at Janesville................................ 61West Fork Cedar River at Finchford..................... 62

Shell Rock River near Northvood...................... 63Winnebago River at Mason City...................... 64

Willow Creek: Clear Creek:

Clear Lake at Clear Lake..................... 65Shell Rock River at Shell Rock.*..................... 66

Beaver Creek at New Hartford........................... 67Black Hawk Creek at Hudson............................. 68

Cedar River at Waterloo.................................. 69Wolf Creek:

Fourmile Creek near Lincoln.......................... 70Half Mile Creek near Gladbrook..................... 71

Fourmile Creek near Traer............................ 72Cedar River at Cedar Rapids...................*...... 73

Prairie Creek, at Fairfax............................... 74Cedar River near Conesville.............................. 75

Iowa River at Wapello...................................... 76SKUNK RIVER BASINSouth Skunk River (head of Skunk: River) near Antes.......... 77

Squaw Creek at Anes. ...................................... 78South Skunk River below Squaw Creek near Aies. ............. 79

Indian Creek near Mingo.................................. 80South Skunk River near Oskaloosa,.......................... 81

North Skunk River near Sigourney......................... 82Big Creek near Mount Pleasant............................ 83

Skunk River at Augusta..................................... 84Mississippi River at Keokuk.................................. 85

DES MOINES RIVER BASINDes Hoines River at Estherville............................ 86Des Moines River at Hunboldt............................... 87

East Fork Des Moines River near Burt..................... 88East Fork Des Moines River at Dakota City................ 89Lizard Creek near Clare.................................. 9

Des Moines River at Fort Dodge............................. 91Boone River near Webster City............................ 92

Des Hoines River near Stratford............................ 93Des Moines River near Saylorville.......................... 94

Beaver Creek near Crises................................. 95North Raccoon River (head of Raccoon River): Outlet Creek:

Storm Lake at Storm Lake............................. 96Cedar Creek:

Big Cedar Creek near Varina.......................... 97

SURFACE WATER STATIONS, IN DOWNSTREAM ORDER Continued VII

R i YE R_ BA SI jj C on ti n u ed DES MOINES RIVER BASIN Continued Page

North Raccoon River near Sac City. ....................... 98Indian Creek:

Wall Lake outlet:Blackhawk Lake at Lake View. ....................... 99

North Raccoon River near Jefferson... .................... 100Hardin Creek:

East Fork Hardin Creek near Churdan... ............... 101South Raccoon River:

Middle Raccoon River at Panora...* ................... 102South Raccoon fiiver at Redfield. ....................... 103

Raccoon River at Van Meter ............................... 104Walnut creek at Des Moines.... ......................... 105

Des Moines River below Raccoon River at Des Moines.. ....... 107Fourmile Creek at Des Moines.. ......................... 108

North River near Norwalk., ............................... 109Middle River near Indianola. .............................. 110South River near Ackworth. ............................... HIWhite Breast Creek near Dallas.. ......................... 112

Lake Red Rock near Pella.. ................................. H3Des Moines River near Tracy. ............................... 114

Cedar creek near Bussey. ................................. H5Des Moines River at Ottunva. ............................... H6Des Moines River at Keosauqua. ............................. 117

Sugar Creek near Keokuk. ................................. 118FOX RIVER BASINFox River at Bloomfield... ................................. 119

IIS S OURi:_R I V R _ B AS N Missouri River:

BIG SIOUX RIVER BASIN Big Sioux River:

Rock River at Rock Rapids. ............................... 120Rock River near Rock Valley. ............................. 121

Big Sioux River at Akron. .................................. 122Missouri River at Sioux City ................................. 123

FLOYD RIVER BASINFloyd River at Alton. ...................................... 124

West Branch Floyd River near Struble. .................... 125Floyd River at Janes.. ..........................*.* 126MONONA-HARRISON DITCH BASINMonona-Harrison ditch near Turin. .......................... 127

VIII SURFACE WATER STATIONS, IH DOWNSTREAM ORDERContinued

MISSOURI RIVER BASINContinuedLITTLE SIOUX RIVER BASIN Page Little Sioux River:

Mil ford Creek:Loon Creek near Orleans......................................... 128Spirit Lake near Orleans.. ............................. 130Spirit Lake outlet at Orleans.*........................ 131West Okoboji Lake at Lakeside Laboratory

near Milford......................................... 133Milford Creek near Milford............................... 134Hilford Creek at Milford................................. 135

Little Sioux River at Gillett Grove........................ 137Little Sioux River at Linn Grove........................... 138Little Sioux River at Correctionville...................... 139

Maple River:Odebolt Creek near Arthur.............................. 140

Maple River at Mapleton. ................................. 141Little Sioux River near Turin.............................. 142SOLDIER RIVER BASINSoldier River at Pisgah.................................... 143BOYER RIVER BASINBoyer River at Logan....................................... 144

Willow Creek near Logan.................................. 145Missouri River at Omaha, Nebraska............................ 146

INDIAN CREEK BASINIndian Creek at Council Bluffs.,........................... 147MOSQUITO CREEK BASINMosquito Creek near Barling................................ 148

Missouri River at Nebraska City, Nebraska.................... 149NISUNABOTNA RIVER BASINWest Nishnabotna River (head of Nishnabotna River)

at Hancock............................................... 150West Nishnabotna River at Randolph......................... 151

East Nishnabotna River:Davids Creek near Hanlin............................... 152

East Nishnabotna River near Atlantic..................... 153East Nishnabotna River at Red Oak........................ 154

Nishnabotna River above Hamburg............................ 155TARKIO RIVER BASINTarkio River at Stanton.................................... 156

Missouri River at Rulo, Nebraska............................. 157NODAWAY RIVER BASINNodavay River at Clarinda.................................. 158

SUBFACE WATER STATIONS, IN DOWNSTREAM ORDERContinued IX

HISgOORI RIVER BASINContinuedPLATTE RIVER BASIN (Iowa-Missouri) Page Platte River near Diagonal...*............................. 159

One Hundred and Two River:East Fork One Hundred and Two River near

Bedford.............................................. 160GRAND RIVER BASIN Grand River:

Thompson River:Elk Creek near Decatur City............................ 161

Thompson River at Davis City............................. 162Weldon River near Leon................................. 163"

CHARITON RIVER BASINChariton River near Chariton............................... 164

South Fork Chariton River near Promise City.............. 165Rathbun Lake near Rathbun. ................................. 166Chariton River near Rathbun................................ 167

WATER QUALITY STATIONS, IN DOWNSTREAM ORDER FOR WHICH RECORDS ARE PUBLISHED

(Letters after station name designate type of data c, chemical; t, water temperature; s, sediment)

RI VER_ BASIN Pag e Mississippi River:

UPPER IOWA RIVER BASINUpper Iowa River at Decorah, (ct) .......................... 195

Mississippi River at Dubuque, (ct) ........................... 197IOWA RIVER BASINIowa River at Iowa City, (cts) ............................. 199

Ralston Creek at Iowa City, (cts) ........................ 203Cedari River:

Wolf Creek:Fourmile Creek near Lincoln, (cts) ................... 207

Half Mile Creek near Gladbrook, (cts) .............. 211Fourmile Creek near Traer, (cts) ..................... 215

Mississippi River at Burlington, (ct) ........................ 219DBS MOINES RIVER BASINDes Moines River at Fort Dodge , (ct) ....................... 222Des Moines River near Saylcrville, (cts) ................... 223

White Breast Creek near Dallas, (cts) .................... 227

X HATER QUALITY STATIONS, IN DOWNSTREAM ORDERContinuad

ISSOURI_RIVER.BASIN Missouri River:

BIG SIOUX RIVER BASINBig Sioux River at Sioux City, (ct)........................ 232

Missouri River at Sioux City, (ts)........................... 234FLOYD RIVER BASINFloyd River at Janes, (cts)................................ 240Floyd River at Sioux City, (ct)............................ 244LITTLE SIOUX RIVER BASIN

Hilford Creek:Loon Creek near Orleans, (ct).......................... 246Spirit Lake near Orleans, (t).......................... 248Spirit Lake outlet at Orleans, (ct).................... 250

Milford Creek near Milford, (ct) ......................... 251Milford Creek at Milford, (ct) ........................... 252

Little Sioux River at River Sioux, (ct).................... 253SOLDIER RIVER BASINsoldier River near Mondamin, (ct).......................... 255BOYER RIVER BASIN

flillov Creek near Logan, (cts)........................... 257Missouri River at Oaaha, Nebraska, (ts)...................... 260Missouri River at Nebraska City, Nebraska, (s)............... 265

NISHNABOTNA RIVER BASINVest Nisbnabctna River (head of Nishnabotna River):

East Nishnabotna River at Red Oak, (cts)................. 269PLATTE RIVER BASINPlatte River near Diagonal, (cts).......................... 274GRAND RIVER BASIN Grand River:

Thompson River:Elk Creek near Decatur City, (cts)..................... 276

Thompson River at Davis City, (cts)...................... 279Weldon River near Leon, (ct)........................... 285

CHARITON RIVER BASINChariton River near Chariton, (cts)........................ 287

WATEd RESOURCES DATA FOR IOWA, 1973

Part 1. Surface-Water Records Part 2. Water-Quality Records

INTRODUCTION

Water resources data for the 1973 water year for Iowa including records of streamflow or reservoir storage at gaging stations, partial-record stations, and miscellaneous sites, and records of water-quality data on the chemical and physical characteristics of surface and ground water, are given in this report, in Part 1, records are included for 135 gaging stations of which 127 are streamflow discharge stations, and 8 are reservoir or lake stations; also included are records for 156 low-flow partial-record stations, 128 crest^stage partial-record stations, 39 supplemental low-flow and 13 miscellaneous sites. Locations of gaging stations are shown in Figure 2. In Part 2, data on the quality of surface water (chemical, temperature, and sediment) were collected from designated sampling sites at predetermined intervals such as once daily, weekly, monthly, or less frequently. Records are given for 137 sampling stations of which 22 are continuous record stations, 85 are partial-record stations, and 182 are miscellaneous sites. Locations of water- quality stations arc shown in Figure 3. The records were collected and computed by the Water Besources Division of the U,s. Geological Survey under the direction of S. W. Wiitala, district chief. These data represent that portion of the National Water Data system collected by the'U.S. Geological Survey and cooperating State and Federal agencies in Iowa.

Beginning with the 1961 water year, streamflow records and related data have been released by the Geological Survey in annual reports on a State-boundary basis. Water-quality records beginning with the 1964 water year have been similarly released either in separate reports or in conjunction with streamflow records. These reports are for limited distribution and are designed primarily for rapid release of data shortly after the end of the water year.

Records of discharge and stage of streams, and contents and stage of lakes and reservoirs are published in a series of U.S. Geological survey water-supply papers entitled, "Surface Water Supply of the United States." Through September 30, 1960, these water-supply papers were in an annual series and since then are in a 5-year series. Records of chemical quality, water temperatures, and suspended sediment have been published since 1941 in an annual series cf water-supply papers entitled, "Quality of Surface Waters of the United States." More information is given under the headings "Publications" on pages 23 and 24.

2 WATER RESOURCES DATA FOR IOWA, 1973

COOPERATION

The U.S. Geological Survey and organizations of the State of Iowa have had cooperative agreements for the systematic collection of streamflow records since 1914, and for water- guality records since 1943. Organizations that assisted in collecting data through cooperative agreement with the Survey are:

Iowa Geological Survey, Samuel J. Tuthill, director and State Geologist

University of Iowa Institute of Hydraulic Research, Robert B. Bering, dean of College of Engineering and J. P. Kennsdy, director

Iowa state Highway Commission, Joseph Coupal, Jr., director of highways and s. E. Roberts, director of research

Iowa Natural Resources Council, 0. R. HcMurry, director

Iowa state University, Richard E. Hasbrook, contracts and grants officer, and Agricultural Experiment Station, John Mahlstcde, associate director

Linn County, W. G. Harrington, county engineer

City of cedar Rapids, Donald Canney, mayor

City of Des Hoines, Leo L. Johnson, director, department of public works

City of Fort Dodge, Vincent B. Gardner, manager, department of municipal utilities

Assistance in the form of funds or services was given by the Corps of Engineers, U.S. Army, in collecting records for 64 gaging stations, and by the Environmental Protection Agency, in collecting records for seven water-guality stations published in this report. Assistance was also furnished by the Environmental Science Services Administration of the U.S. Department of Commerce.

The following organizations aided in collecting records:

Union Electric Co.; Des Mcines Water Works; Ottumwa Water Works; Waterloo Sewage Treatment Plant; University of Iowa; and cities of Ames, Charles City, Council Bluffs, Iowa City, Marshalltown, Rock Rapids, Sioux City, and Waterloo,

MATER RESOURCES DATA FOR IOWA, 1973

DEFINITION OF TERMS

Terns related to streamflow, water-quality and other hydrclogic data, as used in this report, are defined below. see also table for converting English Units to International System (SI) Units on page 25.

Ac re- foot (AC-FT, acre- ft) is the quantity of water required to cover 1 acre to a depth of 1 foot and is equivalent to 43,560 cubic feet or about 326,000 gallons.

JlI is the shifting portion of fragmented materialof which the streambed is composed*

Biochemical oxygen. dgmand (BOD) is the amount of oxygen required by bacteria while stabilizing decomposable organic matter under aerobic conditions*

Cf s-day is the volume of water represented by a flow of 1 cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, approximately 1.9835 acre-feet, or about 646,000 gallons, and represents a runoff of approximately 0.0372 inch from 1 square mile.

Chemical oxygen .demand (COD) indicates the quantity of oxidizable compounds in water and varies with water composition (s) , temperature, period of contact, and other factors.

gol4f Qrm^organisgs are a group of bacteria used as an indicator of the sanitary quality of the water. The number of coliform colonies per 100 nilliliters is determined by the immediate or delayed incubation membrane filter method.

Contents is the volume of water in a reservoir or lake. Unless otherwise indicated, volume is computed on tjie basis of level pool and does not include bank storage.

Control designates a feature downstream from the gage that determines the stage-discharge relation at the gage. This feature may be a natural constriction of the channel, an artificial structure, or a uniform cross section over a long reach of the channel.

Cubic feet per second per square mile (CFStt) is the average number of cubic feet of water flowing per second from each square mile of area drained, assuming that the runoff is distributed uniformly in time and area.

second (cfs) is the rate of discharge representing a volume of 1 cubic foot passing a given point during 1 second and is equivalent to approximately 7.48 gallons per second or 448.8 gallons per minute.

WATER RESOURCES DATA FOR IOWA, 1973

is tne volume of water (or more broadly, total fluids), that passes a given point within a given period of time.

Mean _ discharge is the arithmetic average of individual daily mean discharges during a specific period.

is the discharge at a particular instant of time. If this discharge is reported instead of the daily mean, the heading of the discharge column in the tables is "Discharge (cfs). M

Drainage area of a stream at a specified location is that area, measured in a horizontal plane, enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the stream above the specified point. Figures cf drainage area given herein include all closed basins, or noncontributing areas, within the area unless otherwise noted.

iil9.e_heiht (G.H.) is the water-surface elevation referred tc some arbitrary gage datum. Gage height is often used interchangeably with the general term "stage, 1* although gage height is more appropriate when used with a reading on a gage.

is a particular site on a stream, canal, lake, or reservoir where systematic observations of gage height or discharge are obtained. When used in connection with a discharge record, the term is applied only to those gaging stations where a continuous record of discharge is computed.

Har.dn.ess of water is a physical-chemical characteristic attributable to the presence of alkaline earths (principally calcium and magnesium) and is expressed as equivalent calcium carbonate (CaCO ).

substance (NBAS) is a measure of apparent detergents. This determination depends on the formation of a blue color when nethylene blue dye reacts with synthetic detergent compounds.

__ (ug/1, UG/L) is a unit expressing the concentration of chemical constituents in solution as the weight (micrograms) of solute per unit volume (liter) of water. One thousand micrograms per liter is equivalent to one milligram per liter.

-Iiter ( ffl 9/lr HG/L) is a unit for expressing the concentration of chemical constituents in solution. Milligrams per liter represents the weight of solute per unit

WATER RESOURCES DATA FOR IOWA, 1973 5

volume of water. Milligrams or micrograms per liter may be converted to lilliequivalents (one thousandth of a gram- equivalent weight of a constituent) per liter by multiplying by the factors in table 1, page 6. Concentration of suspended sediment also is expressed in nig/I, and is based on the weight of sediment per liter of water-sedimant mixture. Sediment concentrations may be converted to parts per million by using the factors in table 2, p. 7.

Par tia1- r,e co rd_s t a t i on is a particular site where limitedstreamflow or water-quality data are collected systematicallyover a period of years for use in hydrologic analyses.

Particle size is the diameter, in millimeters (mm), of suspended sediment or bed material determined by either sieve or sedimentation methods. Sedimentation methods (pipet, bottom- withdrawal tube, visual-accumulation tube) determine fall diameter of particles in either distilled water (chemically dispersed) or in native water (the river water at the time and point of sampling) (Guy, 1969).

Particle-size classification used in this report agrees with recommendations made by the American Geophysical Union Subcommittee en Sediment Terminology. The classification is as follows:

Classification Size (mm) Method of analysis

Clay.......... 0.00024 - 0.004 Sedimentation.Silt.........* .004 - .062 Sedimentation.Sand.......... .062 - 2.0 Sedimentation or sieve.Gravel.*...... 2.0 - 64.0 Sieve.

The particle-size distribution given in this report is not necessarily representative of all particles in transport in the stream. Host of the organic material is removed and the sample is subjected to mechanical and chemical dispersion before analysis in distilled water, chemical dispersion is not used for native-water analysis (Guy, 1969).

plankton is the floating (or weakly swimming) animal or plant life in a body of water consisting chiefly of minute plants (as diatoms and blue-green algae) and of minute animals (as protozoan, entomostracans, and various larvae).

Riinogf_ifi._inhe. (IN.) shows the depth to which the drainage area would be covered if all the runoff for a given time period were uniformly distributed on it.

WATER RESOURCES DATA FOR JOBA, 1973

Table 1.Factors for conversion of chemical constituents in milligrams or micrograms per liter to milliequivalents per liter

Multi- Multi-

Aluminum (Al*^)* Ammonia as NH +* Barium (Ba+ 2 ) .......Bicarbonate (HC03-i) Bromide (Br-) Calcium (Ca+*) ......Carbonate (C0 3-2 )... Chloride (Cl~ ).....Chromium (Cr**)*....Cobalt (Co*2 )*......Copper (Cu+ 2 )*......Cyanide (CN~ )......Fluoride

HATER RESOURCES DATA FOR IOWA, 1973

Susnded^sdii|ent__concentration is the velocity- weighted concentration of suspended sediment in the sampled zone (from the water surface to a point approximately 0.3 ft above the bed) expressed as milligrams of dry sediment per liter of water-sediment mixture (mg/1) *

Heag concentration is the time-weighted concentration of suspended sediment passing a stream section during a 24-hour day.

Table 2.Factors for conversion of sediment concentration in milligrams per liter to parts per million* (All values calculated to three significant figures)

Range of concen- tration in 1000

Di- vide

Range of concen- tration in 1000

0 - 88.05- 2424,240.556.572.588.5

105121137153170186

- 40- 56- 72- 88-104-120-136-152-169-185-200

1.001.011.021.031.041.051.061.071.081.091.101.111.12

201-217 218-232 234-248 250-264 266-280 282-297 299-313 315-329 331-345 347-361 363-378 380-393 395-409

Di- vide-to.1.131.141.151.161.171.181.191.201.211.221.231.241.25

Range ofconcen-trationin 1000

ncj^l

411-424427-440443-457460-473476-489492-506508-522524-538540-554556-570572-585587-602604-617

Di-vide-.kl-

1.261.271.281.291.301.311.321.331.341.351.361.371.38

Range ofconcen-trationin 1000

m^l

619-634636-650652-666668-682684-698700-715717-730732-747749-762765-780782-796798-810

Di-vide

by.

1.391.401.411.421.431.441.451.461.471.481.491.50

*Based on water density of 1.000 g/ml and a specific gravity of sediment of 2.65.

Sodium_adsorption_r^tio (SAR) is the expression of relative activity of sodium ions in exchange reactions with soil and is an index of sodium or alkali hazard to the soil. This ratio should be known especially for water used for irrigating farmland.

Soljjte is any substance derived from the atmosphere, vegetation, soil, or rocks that is dissolved in water.

Specific_conductance is a measure of the ability of a water to conduct an electrical current and is expressed .in micromhos per centimeter at 25 C. Because the specific conductance is related to the number and specific chemical types of ions in

8 WAXES RESOURCES DATA FOR IOWA, 1973

solution, it can be used for approximating the dissolved-solids content in the water. Commonly, the amount of dissolved solids (in milligrams per liter) is about 65 percent of the specific conductance (in micrcmhos) . This relation is not constant from stream to stream or from well to well, and it may even vary in the same source with changes in the composition of the water.

St a

WATER RESOURCES DATA FOR IOWA, 1973

SPECIAL NETWORKS AND PROGRAMS

Hydrologic^bench-mark^station is one that provides hydrologic data for a basin in which the hydrologic regimen will likely be governed solely by natural conditions. Data collected at a bench-mark station may be used to separate effects of natural from manmade changes in other basins which have been developed and in which the physiography, climate, and geology are similar to those in the undeveloped bench-mark basin.

DOWNSTREAM ORDER AND STATION NUMBER

Stations are listed in a downstream direction along the main stream, and stations on tributaries are listed between stations on the main stream in the order in which those tributaries enter the main stream. Stations on tributaries entering above all main-stream stations are listed before the first main-stream station, stations on tributaries to tributaries are listed in a similar manner. In the lists of gaging stations and water- guality stations in the front of this report the rank of tributaries is indicated by indention, each indention representing one rank.

As an added means of identification, each gaging station, partial-record station, and water-guality station has been assigned a station number. These are in the same downstream order used in this report. In assigning station numbers, no distinction is made between partial-record stations and gaging stations; therefore, the station number for a partial-record station indicates downstream order position in a list made up of both types of stations, Water-guality stations located at or near gaging stations or partial-record stations have the same number as the gaging or partial-record station. Gaps are left in the series of numbers to allow for new stations that may be established; hence, the numbers are not consecutive. The complete 8-digit number for each station, such as 05387500, which appears just to the left of the station name includes the 2-digit part number "05" plus the 6-digit downstream order number "387500." In this report, the records are listed in downstream order by parts. The part number refers to an area whose boundaries coincide with certain natural drainage lines. Records in this report are in Part 5 (Upper Mississippi River basin) and Part 6 (Missouri River basin). All records for a drainage basin encompassing more than one state can be arranged in downstream order by assembling pages from the various State reports by station number to include all records in the basin.

10 HATES RESOURCES DATA FOR IOWA, 1973

SURFACE HATER RECORDS

Collection and computation of data

The base data collected at gaging stations consist of records of stage and measurements of discharge of streams or canals, and stage, surface araa, and contents of lakes or reservoirs. In addition, observations of factors affecting the stage-discharge relation or the stage-capacity relation, weather records, and other information arc used to supplement base data in determining the daily flow or volume of water in storage. Records of stage are obtained from direct readings on a nonrecording gage or from a water-stage recorder that gives either a continuous graph of the fluctuations or a tape punched at 5-, 15-, or 60-minute intervals. Measurements of discharge are made with a current meter, using the general methods adopted by the Geological Survey on the basis cf experience in stream gaging since 1888. These methods are described in standard textbooks, in Hater-Supply Paper 888, and in U.S. Geological Survey Techniques of Water Resources Investigations, book 3, chapter A6.

For stream-gaging stations, rating tables giving the discharge for any stage are prepared from stage-discharge relation curves. If extensions to the rating curves are necessary to express discharge greater than measured, they are made on the basis of indirect measurements of peak discharge {such as slope-area or contracted-opening measurements, computation of flow over dams or weirs), velocity-area studies, and logarithmic plotting. The daily mean discharge is computed from gage heights and rating tables, then the monthly and yearly mean discharge are computed from the daily figures. If the stage-discharge relation is subject to change because of frequent or continual change in the physical features that form the control, the daily mean discharge is computed by the shifting- control method, in which correction factors based on individual discharge measuremants and notes by engineers and observers are used in applying the gage heights to the rating tables. If the stage-discharge relation for a station is temporarily changed by the presence of aguatic growth or debris on the control, the daily mean discharge is computed by what is basically the shifting-contrcl method.

At some stream-gaging stations the stage-discharge relation is affected by backwater from reservoirs, tributary streams, or other sources. This necessitates the use of the slope method in which the slope or fall in a reach of the stream is a factor in computing discharge. The slope or fall is obtained by means of an auxiliary gage set at some distance from the base gage. At some stations the stage-discharge relation is affected by changing stage; at these stations the rate of change in stage is used as a factor in computing discharge.

HATER RESOURCES DATA FOR IOWA, 1973 11

At some stream-gaging stations the stage-discharge relation is affected by ice in the winter, and it becomes impossible to compute the discharge in the usual manner. Discharge for periods of ice effect is computed on the basis of the gage-height record and occasional winter discharge measurements, consideration being given to the available information on temperature and precipitation, notes by gage observers and hydrologists, and comparable records of discharge for other stations in the same or nearby basins.

For a lake or reservoir station, capacity tables giving the contents for any stage are prepared from stage-area relation curves definad by surveys. The application of the stage to the capacity table gives the contents, from which the daily, monthly, or yearly change in contents is computed.

If the stage-capacity curve is subject to changes because of deposition of sediment in the reservoir, periodic resurveys of the reservoir are necessary to define new stage-capacity curves. During the period between reservoir surveys the computed contents may be increasingly in error due to the gradual accumulation of sediment.

For some gaging stations there are periods when no gage- height record is obtained or the recorded gage height is sc faulty that it cannot be used to compute daily discharge or contents. This happens when the recorder stops or otherwise fails to operate properly, intakes are plugged, the float is frozen in the well, or for various ether reasons. For such periods the daily discharges are estimated on the basis of recorded range in stage, adjoining good record, discharge measurements, weather records, and comparison with other station records from the same or nearby basins. Likewise, daily contents nay be estimated on the basis of operator's log, adjoining good record, inflow-outflow studies, and other information.

The data in this report generally comprise a description of the station and tabulations of daily and monthly figures. For gaging stations on streams or canals a table showing the daily discharge and monthly and yearly discharge is given. For gaging stations on lakes and reservoirs a monthly summary table of stage and contents or a table showing the daily contents is given. Tables of daily mean gage heights are included for some streamflow stations and for some reservoir stations. Records are published for the water year, which begins on October 1 and ends on September 30. A calendar for the current water year is shown on the reverse side of the front cover to facilitate finding the day of the week for any date.

The description of the gaging stations gives the location, drainage area, period of record, type and history of gages, average discharge, extremes of discharge or contents, general remarks, and notations of revisions of previously published

12 HATER RESOURCES DATA FOR IOWA, 1973

records. The location of the gaging station and the drainage area are obtained frcra the most accurate maps available. River mileage, given under "LOCATION11 for some stations, is that determined and used by the Corps of Engineers or other agencies. Periods for which there are published records for the present station or for staticns generally equivalent to the present one are given under "PERIOD OP RECORD." The type of gage currently in use, the datum of the present gage above mean sea level, and a condensed history of the types, locations, and datums of previous gages used during the period of record are given under "GAGE." In references to datum of gage, the phrase "mean sea level" denotes "Sea Level Datum of 1929" as used by the Topographic Division of the Geological Survey unless otherwise qualified. The average discharge for the number of years indicated is given under "AVERAGE DISCHARGE;" it is not given for stations having fewer than 5 complete years of record or for stations where changes in water development during the period of record cause the figure to have little significance. In addition, the median of yearly mean discharges is given for stream-gaging stations having 10 or more complete years of record if the median differs from the average by more than 10 percent. The maximum discharge (or contents) and the maximum gage height, the minimum daily discharge (or minimum contents) and the minimum gage height if it is significant are given under "EXTREMES." In the first paragraph headed "Current year," the data given are for the complete current water year unless otherwise specified. In the second paragraph under "EXTREMES" headed "Period of record:" the data given are for the period of record given in PERIOD OF RECORD paragraph. Reliable information concerning major floods that occurred outside the period of record is given in the third or last paragraph under "EXTREMES." Unless otherwise qualified, the maximum discharge (or contents) corresponds to the crest stage obtained by use of a water-stage recorder (graphic or digital), a crest-stage gage, or a nonrecording gage read at the time of the crest. If the maximum gage height did not occur at the same time as the maximum discharge (or contents), it is given separately. Information pertaining to the accuracy of the discharge records, to conditions that affect the natural flow at the gaging station, and availability of Water Quality records, is given under "REMARKS;" for reservoir stations information on the dam forming the reservoir, tha capacity, outlet works and spillway, and purpose and use of the reservoir, is also given under "REMARKS."

Previously published records of some stations have been found to be in error on the basis of data or information later obtained. Revisions of such records are usually published along with the current records in one of the annual or compilation reports. In order to make it easier to find such revised records, a paragraph headed "REVISIONS (WATER YEARS)" has been added to the description of all stations for which revised records have been published. Listed therein are all the reports in which revisions have been published, each followed by the water years for which figures are revised in that report. In listing the water years only one number is given; for instance,

WATE3 RESOURCES DATA FOR IOWA, 1973 13

1965 stands for the water year October 1, 1964, to September 30, 1965. If no daily, monthly, or annual figures of discharge were revised, that fact is brought out by notations after the year dates as follows: M (M)" means that only the instantaneous maximum discharge was revised; M (m) " that only the instantaneous minimum was revised; and "(P) M that only peak discharges were revised. If the drainage area has been revised, the report in which the revised figure was first published is given. It should be noted that for all stations for which cubic feet per second per square mile and runoff in inches are published, a revision of the drainage area necessitates corresponding revision of all figures based on the drainage area. Revised figures of cubic feet per second per sguare nile and runoff in inches resulting from a revision of the drainage area only are usually not published in the annual series of reports.

Skeleton capacity tables are published for all reservoirs for which records of contents are published on a daily basis.

The daily table for stream-gaging stations gives the mean discharge for each day and is followed by monthly and yearly summaries. In the monthly summary below the daily table, the line headed "TOTAL** gives the sum of the daily figures. The line headed "MEAN** gives the average flow in cubic feet per second during the month. The lines headed "BAX" and "BIN11 give the maximum and minimum daily discharges respectively, for the month. Discharge for the month also may be expressed in cubic feet per second per sguare mile (line headed "CFSM") , or in inches (line headed "IN."), or in acre-feet (line headed "AC-FT"). Figures for cubic feet per second per sguare mile and runoff in inches are omitted if there is extensive regulation or diversion, if the drainage area includes large noncontributing areas, or if the average annual rainfall over the drainage basin is usually less than 20 inches.

In the yearly summary below the monthly summary, the figures following "MAX" are the maximum daily discharges for the calendar and water years; likewise, those following "MIN H are the minimum daily discharges.

Footnotes to the table of daily discharges are introduced by the word "NOTE." Footnotes are used to indicate periods for which the discharge is computed or estimated by special methods because of no gage-height record, backwater from various sources, or other unusual conditions. Periods of no gage-height record are indicated if the period is continuous for a month or more or includes the naximum discharge for the year. Periods of backwater from an unusual source, of indefinite stage-discharge relation, or of any other unusual condition at the gage site are indicated only if they are a month or more in length and the accuracy of the records is affected. Days on which the stags- discharge relation is affected by ice are not indicated. The methods used in computing discharge for various unusual conditions have been explained in preceding paragraphs.

14 WATER RESOURCES DATA FOR IOWA, 1973

Peak discharges and their times of occurrence and corresponding gage heights for many stations are listed below the yearly summary. All independent peaks above the selected base are given. The base discharge, which is given in parentheses, is selected so that an average of about three peaks a year can be presented. Peak discharges are not published for any canals, ditches, drains, or for any stream for which the peaks are subjected to substantial control by man. Time of day is expressed in 24-hour local standard time; for example, 12:30 a.m. is 0030, 1:30 p.m. is 1330.

For gaging stations on lakes and reservoirs the data presented comprise a description of the station and a daily summary table of stage or contents. A skeleton table of capacity at given stages is published for all reservoirs.

Data collected at partial-record stations and miscellaneous sites are given in four tables at the end of the surface-water records in this report. The first is a table of discharge measurements at low-flow partial-record stations, the second is a table of annual maximum stage and discharge at crest-stag stations, the third is a table of discharge measurements at miscellaneous sites, and the fourth is a table of supplemental low-flow measurements made during periods of low flow.

of_dat a

The accuracy of discharge data depends primarily on (1) the stability of the stage-discharge relation, or if the control is unstable, the frequency of discharge measurements, and (2) the accuracy of observations of stage, measurements of discharge, and interpretation of records.

The station description under "KEMARKS" states the degree of accuracy of the records. "Excellent" means that about 95 percent of the daily discharges are within 5 percent; "good 11 within 10 percent; and "fair" within 15 percent. "Poor" means that daily discharges have less than "fair" accuracy.

Figures of daily mean discharge in this report are shown tc the nearest hundredth of a cubic foot per second for discharges of less than 1 cfs; to tenths between 1.0 and 10 cfs; to whole numbers between 10 and 1,000 cfs; and to 3 significant figures above 1,000 cfs. The number of significant figures used is based solely on the magnitude of the figure. The same rounding rules apply to discharge figures listed for partial-record stations and miscellaneous sites.

Discharge at many stations, as indicated by the monthly mean, may not reflect natural runoff due to the effects of diversion, consumption, regulation by storage, increase or decrease in evaporation due to artificial causes or to other factors. For

Figu

re

I.M

ap o

f Io

wa

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loca

tion

of

cont

inuo

us-r

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d ga

ging

sta

tion

s.

16 WATER RESOURCES DATA FOR IOWA, 1973

such stations, figures of cubic feet per second per square mile and of runoff in inches are not published unless satisfactory adjustments can be made for diversions, for changes in contents of reservoirs, or for other changes incident to use and control. Evaporation from a reservoir is not included in the adjustments for changes in reservoir contents, unless it is so stated* Even at those stations where adjustments are made, large errors in computed runoff may occur if adjustments or losses are large in comparison with the observed discharge.

Publications

In each water-supply paper entitled, "Surface Water Supply of the United states" there is a list of numbers of preceding water- supply papers containing streamflow information for the area covered by that report. In addition, there is a list of numbers of water-supply papers containing detailed information on major floods in the area. Records for stations in Iowa for the period October 1960 to September 1965 are in Water-supply Papers 1914, 1915, 1917, 1918, and 1919.

Two series of summary reports entitled, "Compilation of Records of Surface Waters of the United States" have been published; the first series covers the entire period of record through September 1950 and the second series covers the period October 1950 to September 1960. These reports contain summaries oi monthly and annual discharge and mcnth-end storage for all previously published records, as well as some records not contained in the annual series of water-supply papers. All records were reexamined and revised where warranted. Estimates of discharge were made to fill short gaps whenever practical. The yearly summary table for each gaging station lists the numbers of the watersupply papers in which daily records were published for that station. Records for stations in Iowa are compiled in Water-supply Papers 1308, 1309, and 1310 through September 1950, and in 1728, 1729, and 1730 for October 1950 to September 1960.

Special reports on major floods or droughts or of other hydrologic studies for the area have been issued in publications other than water-supply papers. Information relative to these reports may be obtained from the district office.

Qtfaer^data^available

Information of a more detailed nature than that published for most of the gaging stations, such as discharge measurements, gage-height records, and rating tables, is on file in the district office. Also, most gaging-station records are available in computer-usable form and many statistical analyses have been made.

WATER RESOURCES DATA FOB IOWA, 1973 17

WATER QUALITY RECORDS

Collection^ and examination T.QJLd at a

Water samples for analyses usually are collected at or near gaging stations. The discharge records at these stations are used in conjunction with the computations of the chemical constituents and sediment loads in this report.

Descriptive statements are given for water-quality stations located at or near streamflow stations. Given are location, drainage area, periods of record for the various water-quality data, extremes of pertinent data, and general remarks, in a format similar to that used for streamflow gaging stations.

Water-quality information is presented for chemical quality, biological, microbiological, water temperature, and fluvial sediment. Chemical quality includes concentrations of individual dissolved constituents and certain properties or characteristics such as hardness, sodium adsorption ratio, specific conductance, and pH. The biological information includes qualitative and quantitative analyses of plankton, bottom organisms, and particulate inorganic and amorphous matter present. Microbiological information includes quantitative identification of certain bacteriological indicator organisms. Water- temperature data represent once-daily observations except for stations where a continuous temperature recorder furnished information from which daily minimums and maximurns are obtained. Fluvial-sediment information is given for suspended-sediment discharges and concentrations and for particle-size distribution of suspended sediment and bed material.

Prior to 1968 water year, data for chemical constituents and concentration of suspended sediment were reported in parts per million (ppm) and water temperatures were reported in degrees Fahrenheit (F). In October 1967 the U.S. Geological Survey began to use the metric system; data for chemical constituents and concentrations of suspended sediment are now reported in milligrams per liter (mg/1) and water temperatures are given in degrees Celsius (centigrade, C). In waters with a density of 1.000 g/ml (grams per milliliter), parts per million and milligrams per liter can be considered equal. In waters with a density greater than 1.000 g/ml, values in parts per million should be multiplied by the density to convert to milligrams per liter. To convert temperatures in degrees Celsius to degrees Fahrenheit, see table 3 on the next page.

In October 1968, the Geological Survey began reporting many of the chemical constituents as well as the minor elements in micrograms per liter instead of milligrams per liter. (See "Definition of Terms," p. 4).

18 WATER RESOURCES DATA FOR IOWA, 1973

Table 3.Degrees Celsius (C) to degrees Fahrenheit (F)* (Temperature reported to nearest 0.5C)

O op Q op QC op C F C F

0.0.5

1.01.52.02.53.03.54.04.55.05.56.06.57.07.58.08.59.09.5

3233343536363738394041424344454546474849

10. C10.511.011.512.012.513.013.514.014.515.015.516.016.517.017.518.018.519.019.5

5051525354545556575859606162636364656667

20.020.521.021.522.022.523.023.524.024.525.025.526.026.527,027.528.028.529.029.5

6869707172727374757677787980818182838485

30.030,531.031.532.032.533.033.534.034.535.035.536.036.537.037.538.038.539.039.5

86878889909091929394959697989999

100101102103

40.040.541.041.542.042.543.043.544.044.545.045.546.046.547.047.548.048.549.049.5

104105106107108108109110111112113114115116117117118119120121

C = 5/9 (F - 32) or F = 9/5 (C) + 32

Solutes

The methods of collecting and analyzing water samples for determining the kinds and concentrations of solutes are described by Brown, Skougstad, and Fishman (1970) . One sample can define adequately the water guality at a given time if the mixture of solutes throughout the stream cross section is homogeneous. However, the concentration of solutes at different locations in the cross section may vary widely with different rates of water discharge, depending on the source of material and the turbulence and mixing of the stream. Some streams must be sampled at several verticals across the channel to determine accurately the solute load.

WATER RESOURCES DATA FOR IOWA, 197319

20 HATER RESOURCES DATA FOR IOWA, 1973

Temperature

Water temperatures are measured at most of the water-quality stations. For daily stations, the water temperatures are taken about the same time each day when the sample is collected* Large streams have a small diurnal temperature change while small, shallow streams may have a daily range of several degrees and may follow closely the changes in air temperature. Some streams may be affected by waste-heat discharges.

At stations where continuously recording thermographs are present, the records consist of laximum and minimum temperatures for each day and the monthly averages.

Water temperature is usually measured at gaging stations when the discharge is measured. Although these temperatures are usually measured monthly and on different days of the month, an analysis of these data for each month for a long period of record will indicate significant thermal characteristics of the stream. Data have been analyzed for the period of record for gaging stations with 10 or more years of record. A summary is published in the 1969 report of this series in the table entitled "Extremes and Wean Periodic Water Temperature" for each month.

Sediment

Suspended-sediment concentrations are determined from samples collected using depth-integrating samplers. Samples usually are obtained at several verticals in the cross section, or a single sample may be obtained at a fixed point and a coefficient applied to determine the mean concentration in the cross sections.

During periods of rapidly changing flow or rapidly changing concentration, samples may have been collected more frequently (twice daily or, in some instances, hourly). The published sediment discharges for days of rapidly changing flow or concentration were computed by the subdivided day method (time- discharge weighted average). Therefore, for those days when the published sediment discharge value differs from the value computed as the product of discharge times mean concentration times 0.0027, the reader can assume that the sediment discharge for that day was computed by the subdivided day method. For periods when no samples are collected, daily loads of suspended sediment are estimated on the basis of water discharge, sediment concentrations observed immediately before and after the periods, and suspended-sediment loads for other periods of similar discharge.

HATER RESOURCES DATA FOR IOWA, 1973 21

At other stations, suspended-sediment sanples are collected periodically at many verticals in the stream cross section. Although data collected periodically nay represent conditions only at the tiie of observation, such data are useful in establishing seasonal relations between quality and streamflow in predicting long-term sediment-discharge characteristics of the stream,

In addition to the records of the quantities of suspended sediaent, records of periodic measurements of the particle-size distribution of the suspended sediaent and bed material are included*

Publications

The annual series of water-supply papers that contain infornation on quality of surface waters in Iowa are listed below.

water WSP

19411942194319441945194619471948

942950970

10221030105011021132,

Water HSP

19491950195119521953195419551956

1162118711981251129113511401

.-1451

Hater

19571958195919601961196219631964

HSP-NO-.

15211572164317431883194319561956

HateIa

1965196619671968196919701971

WSP

1963199320132094,20952144,21452154,21552164,2165

HYDROLOGIC CONDITIONS

Annual runoff during the 1973 water year was considerably above normal except in the northwestern part of the state, which was normal (2 to 4 inches) Runoff from areas except the Northwest was 10 to 24 inches compared to a normal of 4 to 8 inches. Sone outstanding floods occurred but generally, the excessive runoff resulted froi continual above nornal precipitation throughout the year.

22 WATER RESOURCES DATA FOR IOWA, 1973

06810000 Nishnobotno River above Hamburg

Drainage area 2806 sq mi.

OCT NOV DEC JAN FEB MAR APR MAY JUNE JULY AUG SEPT THE YEAR

05464500 Cedar River at Cedar Rapids

Drainage area, 6510 sq mi.

OCT NOV DEC JAN FEB MAR APR MAY JUNE JULY AUG SEPT THEYEAR

05481300 Des Moines River near Stratford Drainage area, 5452 sq mi.

OCT NOV DEC JAN FEB MAR APR MAY JUNE JULY AUG SEPT THE YEAR

Mean of monthly and yearly mean discharges for water years 1931-60.

j Monthly and yearly mean discharges during 1973 water year.

FIGURE 3.RUNOFF DURING 1973 WATER YEAR COMPARED WITH MEAN RUNOFF FOR PERIOD 1931-60 FOR THREE REPRESENTATIVE GAGING STATIONS

WATER RESOURCES DATA FOR IOWA, 1973 23

Outstanding floods occurred during the period April to May in the lower reaches of the Wapsipinicon, Iowa and Skunk Rivers and their tributaries. Heavy rains and melting from an April snowstorm produced these floods. Tha Mississippi River had three significant flood peaks during the period March to Hay. The peak in April at Keobuk was the highest since 1851. Torrential rains of 12 to 15 inches produced outstanding floods on the Des Moines River tributaries near the Des Moines area in July.

SELECTED REFERENCES

American Public Health Association, and others, 1971, Standard methods for the examination of water and wastewater, 13th ed.: Am. Public Health Assoc., New York, 874 p.

Brown, Eugene, Skougstad, M. W., and Fishman, M. J., 1970, Methods for collection and analysis of water samples for dissolved minerals and gases: U.S. Geol. Survey Technigues of Water-Resources Inv., book 5, chap. Al, 160 p.

Carter, R. W, , and Davidian, Jacob, 1968, General procedures for gaging streams: U.S. Geol. Survey Techniques of Water- Resources Inv., book 3, chap. A6, 13 p.

Colby, B. R. , 1963, Fluvial sedimentsa summary of source, transportation, deposition, and measurement of sediment discharge: U.S. Geol. Survey Bull. 1181-A, 47 p.

Colby, B. R. and Hembree, C. H. , 1955, Computations of total sediment discharge, Niobrara River near Cody, Nebraska: U.S. Geol. Survey Water-Supply Paper 1357, 187 p.

Colby, B. R., and Hubbell, D. W., 1961, Simplified methods for computing total sediment discharge with tha modified Einstein procedure: U.S. Geol, Survey Water-supply Paper 1593, 17 p.

Corbett, D. M., and others, 1943, reprinted 1957, Stream-gaging procedures, a manual describing methods and practices of the Geological Survey: U.S. Geol. Survey Water-Supply Paper 888, 245 p.

Goerlitz, D. F., and Brown, Eugene, 1972, Methods for analysis of organic substances in water: U.S. Geol. Survey Technigues of Water-Resources Inv., book 5 Chap. A3, 40 p.

Guy, H, P., 1970, Fluvial sediment concepts: U.S. Geol. Survey Technigues of Water-Resources Inv., book 3, chap. Cl, 55 p.

___, 1969, Laboratory theory and methods for sediment analysis: U.S. Geol. survey Technigues of Water-Resources Inv., book 5, chap. Cl, 57 p.

24 BATES RESOURCES DATA FOB IOWA, 1973

Guy, H. P., and Norman, V. w., 1970, Field aethods for measurement of fluvial sediment: U.S. Geol. Survey Techniques of Hater-Hesources Inv., book 3, chap. C2, 59 p.

Hen, J. D. , 1970, Study and interpretation of the chemical characteristics of natural water - Revised edition: U.S. Geol. Survey Hater-Supply Paper 1473, 363 p.

Langbein, W. B., and Iseri, K* T, 1960, General introduction and hydrologic definitions: U.S. Geol. Survey Water-Supply Paper 1541-A, 29 p.

Porterfield, George, 1972, Computations of fluvial sediment discharges: U.S. Geol. Survey Techniques of Water-Resources Inv,, book 3, chap. C3, 179 p.

Ritter, J. R., and Helley, E. J., 1969, Optical method for determining particle sizes of coarse sediment: U.S. Geol. Survey Techniques of Water-Resources Inv., book 5, chap. C3.

Rose, Arthur and Elizabeth, 1966, The condensed chemical dictionary: Reinhold Pub. Corp., New York, 7th ed., p. 257.

U.S. Inter-Agency Committee on Water Resources, Subcommittee on Sedimentation, A study of methods used in measurement and analysis of sediment loads in streams. Published by the St. Anthony Falls Hydraulic Laboratory, Minneapolis, Minn.

___1941, Methods of analyzing sediment samples: Rept. 4.

___1953, Accuracy of sediment size analyses made by the bottom- withdrawal-tube method: Rept. 10.

___1957, The development and calibration of visual-accumulation tube: Rept, 11.

___1957, Some fundamntals of particle size analysis: Rept. 12.

___1959, Federal Inter-agency sedimentation instruments and reports: Rept. AA*

___1961, The single stage sampler for suspended sediment: Rept. 13.

1963, Determinations of fluvial sediment discharge: Rept. 14.

HATEB RESOURCES DATA FOR IOWA, 1973 25

Table 4.Factors for converting English Units to International System (SI) Units

The following factors nay be used to convert the English units published herein to the International System of Units (SI). This report contains and subsequent reports will contain both the English and SI unit equivalents in the station manuscript descriptions until such tine that all data will be published in SI units.

Multiply English units

inches (in) feet (ft) miles (mi)

acressquare miles (mi 2 )

cubic feet (ft 3 ) cfs-day (ft 3 /s-day) acre-feet (acre-ft)

cubic feet per second (ft 3 /s)

By

Length

25.4.3048

1*609

Area

4,0472.590

To obtain SI units

millimeters (mm) meters (m) kilometers (km)

square meters (m 2 ) square kilometers (km 2 )

Volume

02832 cubic meters2,4471,233

cubic meters (m 3 ) cubic meters (m 3 )

Flow

.02832 cubic meters persecond (m 3/s)

28.32 cubic decimeters per second (dm 3/s)

ton (short)

Mass

.9072 tonne (t)

PART 1. SURFACE WATER RECORDS

UPPER IORA RITBR BASXB

05187500 UPPER IOA RIT8R IT DECORAH, XOVA

29

LOCATXOV.Lat 1819", long 9147'48", in IB1/4 s1/4 sec. 16. 1.98 V., 1.8 V., Vlnneskiek County, on right tank 1,200 ft (366 ) upstream fro* bridge on U.S. Highway 52 (city rout*) in Decor ah. 1,500 ft (57 n) dorastrean fron Dry Bun cutoff, and 3.0 ni (4.8 kn) upstrean fron Trout Bun.

DRAIHAGE ABBA.511 ni* (1,323 Jcn) .

PERIOD OP RECOBD.August 19S1 to current year.

6A6B.Rater-stage recorder. Datum of gage is 850.00 ft (259.08 n) above nean sea level.

AYBRAGB DISCHARGE. 22 years, 296 ft/a (8.38 n/s) , 7.87 in/yr (200 nn/yr> , 214,500 acr-ft/yt (264 hn/yr).

BXTBBHES.Current year: Haxinun discharge. 6,290 ft'/s (178 a'/s) Apr. 17, gage height, 9.42 ft (2.871 n); axinun gage height, 9.57 ft (2.917 n) Dec. 30, backwater fron ice; nininun daily discharge, 156 ft'/s (4.42 n'/s) Sept. 15, 16.

Period of record: Haxinun discharge, 20,200 ft'/a (572 n'/s) Bar. 27, 1961, gage height, 13.08 ft (3.987 n) ; nininun daily, 22 ft'/s (0.62 i3/s) Feb. 2-7, 1959.

naxinun flood known, probably since at least 1913, occurred Hay 29, 1941, at site of forner gaging station near Decorah, H ni (6.4 kn) downstreai, discharge, 28,500 ft'/a (807 n'/s).

REMARKS.Records good except those for winter period, which are fair, the current year are published in Part 2 of this report.

BEVISIOIS.SP 1438: Drainage area.

Records of periodic chemical analyses for

DISCHARGE. IN CUBIC FEET PER SECOND. WATER YEAR OCTOBER 1972 TO SEPTEMBER 1973

DAY OCT NOV DEC JAN FEB MAR APR MAV JUN JUL AUG SEP

12345

678910

11121314IS

1617181920

2122232425

262728293031

TOTALMEANMAXMINCFSMIN.AC-FT

CAL VRWTR YR

1.6501,220

9451,1901.000

901846814702635

590550520491466

456431414396392

444525

1.3603.0902.060

1.330978844760698

1.070

27.768896

3.0903921.752.02

55.080

1*300 4081,990 3912,220 3541,760 2941,320 290

1,050 2901,280 2701*880 2601.700 2551.210 250

979 250882 245811 245750 240697 240

660 235632 230603 240580 250559 255

540 255518 250498 245489 240485 235

482 235466 230438 240416 250414 3.300

3,150

27,609 14,122920 456

2,220 3,300414 2301.80 .892.01 1.03

54,760 28,010

1972 TOTAL 169,921 MEAN1973 TOTAL 262,993 MEAN

1,120664584406380

360320280260.250

245240235235230

230900

4,2003,0501,490

815600480420400

410450350300310320

20,534662

4,2002301.301.49

40,730

464 MAX721 MAX

1,3001.300540539669

487408301270270

265260255250220

170210230240230

230230280330220

200200200

___

10.304368

1.300170.72.75

20,440

5*7805.550

8931.1801.4601.4601.200

8851,7501*720

949969

3.8203*7101.5702*4402.760

1,8401.3401.050

847744

674624589569589

652668585542517501

39.0971.2613.820

5012.472.85

77,550

MIN 50MIN 156

535611778649559

500472441424358

936382456818

2,720

4*9705.5502.8602.0001.700

1,4801,3101,2001.010

921

52782727750

1*420"~

37*5651,2525,550

3362.452.73

74.510

CFSMCFSM 1

2.4005,2303,5402.2401.760

1.5902,1903,3603.4802.020

1,5601,3501,1601,050930

850788739690645

625625595577571

553, 583

866886886732

45,0911*4595,230

5532.843.28

89,320

.91 IN 12.

.41 IN 19.

638589577577795

677619541500466

444432414403396

420784

1*5701,4501.350

756597522468426

408414385380354

IB. 346 B612

1*5709541.201.34

36,990 17

37 AC-FT15 AC-FT

396940365518561

442364324303292

27826T257251245

242297232229226

297276256242295

256256228217216209

,9372B8561209.56.65

,730

337,000521,600

209198194198207

219239934520991

950276255256290

221210207202196

192196205206219

208196185ITTIT11*7

7,210233520167.4*.52

14,300

165168168185182

1861761741T6169

164161158157156

156167169162159

159179170159176

ItT29043644891

"

6,470216998156.42.47

12*830

PEAK DISCHARGE (BASE, 4,000 M'/S)

DATE

12-301-183-11

TIHE

173007000630

6. H. DISCHARGE

*5,fOO*4.900

8.42 4,630

DATE

4-175-2

TXHB

12001000

6. H.

9.429.23

DISCHARGE

6,2905,940

* About

30 PAIIT CREEK BASH

05388500 PilHT CBEEK AT f ATEBVIU.B, IOIA

LOCATION.Lat 431237, long 911821", in IR1/4 IRI/H sec.22, T.97 I., R.4 V., Alamakee County, on right bank 100 ft (30 ) downstream from bridge on county highway 132, 0.5 mi (0.8 km) northwest of Haterville and 10 mi (16.1 km) upstreas fro* mouth.

DRAINAGE ABBA.42.8 mi* (111 km) .

PERIOD OF RECORD.October 1952 to September 1973 (discontinued). Monthly discharge only for some periods published in RSP 1728.

GASE.--Hater-stage recorder.

AYERA6E DISC HA RGB.--21 years, 15.9 ftVa (0.45 m'/s) . 5.0* in/yr (12% mm/yr), 11,520 acre-ft/yr (14.2 h'/yr).

BXTRBHBS.Current year: Maximum discharge, 1,900 ft'/s (53.8 B'/S) Dec. 30, gage height, 7.30 ft (2.225 ); minimum daily, 10 ft'/s (0.28 u*/a) Oct. 18,19.

Period of record: Maximum discharge, 5,010 ft'/s (142 B 3 /s) July 29, 1970, gage height, 10.31 ft (3.142 ); minimum daily, 1.1 ft'/s (31 dm 3/a) for several days in August and September 1958.

Flood im August 1951 reached a stage of 17.35 ft (5.288 ), from information by local resident on floodmarks in vicinity of gage, discharge, 9,100 ft'/s < 258 "/) computed by unit-runoff studies based on contracted-opening measurement of peak flow at statiou 05388600. A higher stage may have occurred during the spring of 1949.

BEBARKS.Records good except those for vinter period, vhich are fair.

RETISIOHS.RSP 1438: Drainage area.

DAY OCT

DISCHARGE, IN CUBIC FEET PEW SECOND, MATE* YEAR OCTOBfcR 1972 TO SEPTEMBER 1973

NOv DEC JAN PEB MAR APR WAY JUN JUL Al'G SEP

12345

6769

10

11121314IS

1617181*20

2122232425

262728 2436SI

TOTALMEANH*XMlNCF8MIN.ACPT

C*L YRWTR YR

OATS

12-301-172-1

5206474846

4750494643

4544454340

4341393640

4970

22221166

l*i120112101 92

2,2*2 573.922636

t42.48

4,950 11

1972 TOTAL1973 TOTAL

Till G. H

1600 7.301245 5.801530 7.00

136313319239205

16o16?17t167166

163153152164195

191189189187173

US1S6ISO147170

22321318S 100161

,620187519136

1.05Itl7,150

55,16589,734

177168166160140

150160170140100

7075608265

876990

MISSISSIPPI HITBH HAIR STEM

05389500 MISSISSIPPI RIVER AT BCGRBGOR, IOIA

31

LOCATlOI.Lat 4301*29", long 9110'21", in SE1/4 SB 1/4 sec.22, T.95 I., R.3 f., Clayton County, on right bank in city park at east end of Bain street in BcGregor, 2.6 mi (4.? km) upstream from Wisconsin River, 4.3 mi (6.9 km) downstream from Tellow River, and at mile 633.4 (1,019.1 km) upstream from Ohio River.

DRAIRAGE AREA.67,500 i (174,800 km*), approximately.

PERIOD OF RECORD.August 1936 to current year.

GAGE.later-stage recorder. Datum of gage is 605.30 ft (184.50 m) above mean sea level, adjustment of 1912. Prior to June 1, 1937, and since June 2, 1939, auxiliary water-stage recorder; June 1, 1937 to June 1, 1939, auxiliary nontecording gage 14.1 mi (22.7 km) upstream in tailwater of dam 9, at datum 5.30 ft (1.615 m) lower.

AVERAGE DISCBARGB. 37 years, 33,530 ftVs (950 m*/s), 6.75 in/yr (171 mm/yr), 24,290,000 acre-ft/yr (29,900

EXTREMES.--Current year: Maximum daily discharge, 151,000 ft'/s (4,280 m'/s) Mar. 22, 23; maximum gage height, 20.15 ft (6.142 m) Mar. 21; minimum daily discharge, 13,000 ft'/s (368 m'/s) Dec. 11; minimum gage height, 6.38 ft (1.945 m) July 25.

Period of record: Maximum daily discharge, 276,000 ft/s (7,820 m'/s) Apr. 24, 1965; maximum gage height, 25.38 ft (7.736 ) Apr. 24, 1965; minimum daily discharge, 6,200 ft'/s (176 m'/s) Dec. 9, 1936; minimum gage height, -0.86 ft (-0.262 m) Aug. 18, 1936.

Baximnm stage since at least 1828, that of Apr. 24, 1965.

RBBARKS.Records good except those for vinter period, which are fair. Stage-discharge relation affected by backwater from Visconsin River and Dam 10. Flov regulated by reservoirs and navigation dams.

COOPERATIOH.--Gage height record at Dam 9 collected in cooperation vith Corps of Engineers.

DISCHARGE, IN CUBIC FflT PER SECONfi, WATER YEAR OCTOBER 197? TfTSfPTEMBER 1973

DAY

t234S

6789

10

1112IS1IS

1617IBl20

2122252425

2627202930 51

TOTAL'MEANM*XMlNCFBMIN.AC.FTCAL VRWTR VR

OCT73,70079*20077,00076,10074,SOO

71,80060,50066,10061,40050,500

56,10052,7000,2007,lOO44,100

42,20040,50030,30037,30034,700

32*60034,70036,00037,10039,100

41,90044,00047,90048,20046,90045,300

1,603.1M51,71070,20032,600

.77

.005,10*

NOy

42,90042,30042,00044,70047,100

49,90050,50064,40067,70069,100

70,60072,20073,40074,20073,100

70,00066,10062*60059,00053,000

49,00047,30043,00043,00042,400

41,70040,00035,40035,20034,900

1,617. 9M53,93074,20034,900

.00

.093,209M

1972 TOTAL 17,5051973 TOTAL 18,013

DEC JAN

33,400 36,00030,200 36,00027,900 37,00025,000 36,00020,000 35,000

10,000 34,00016,500 33,00015,000 31,00014,500 29,00013,500 27,500

13,000 26,00014,000 26,50010,000 27,00020,000 27,00022,000 27,000

23,000 27,00024,000 27,00025,000 27,00025,000 33,00027,000 38,000

20,000 43,00020,500 44,00029,000 44,00029,000 44,00029,500 45,000

30,000 44,00031,000 41,50031,000 41,00030,000 J0,ooo31,000 35,00033,000 34,000

755000 1,073.5*24,350 34,63033,400 45,00013,000 26,000

.36 .51

.42 .591,490M 2,129M

,800 MEAN 47,830,400 MEAN 49,350

FEB

33,00035,00037,00037,00037,000

33,00030,00028,00026,00027,000

29,00026,00026,00026,00025,000

24,00024,50025,00025,00025,000

25,00024,50024,00024,00025,000

25,00024,50024,000

774*50027,66037,00024,000

.41

.431,536"

MAX*AX

"AH

25,00026,00020,00029,00031,000

32,40037,30045,40052,30059,600

73,10003,10092,700101,000112,000

120,000127,000134,000139,000143,000

140,000151,000151,00014B.,000142,000

135,000127,000119,000114,000100,000102,000

2,935.9M94,710151,00025,000

1.401.62

5,823*

116,000151,000

APR

90,60095,40092,50090,00086,800

04,80003,10081,10000,20079,600

77,20075,20072,90069,80065,600

69,60074,80081,70000,10094,000

94,10092,50091,60009,40087,200

04,60061,30078,40075,40072,800

2,486.3M I82,94098,60065,600

1.231.37

4,936"

Ml" 13,000HIM 13,000

MAY

69,60069,60073,00080,00000,400

97,000104,000Uo,ooo114,000112,000

100,000105,000102,000100,00097,900

95,00091,80009,10006,60003,100

77,70073,60070,30062,30060,000

58,80057,80061,50069,90076,10002,200

,628.7M04,800114,00057,800

1.261.45

5,214*

CFSMCFSM

JUN

86,60008,70089,00008,00085,900

03,30000,90077,40073,00071,600

70,50069,50065,50060,30057,500

54,10052,60049,80047,90046,200

44,50042,70040,90039,90038,100

36,90035,10052,50029,10020,200

1,767,8*56,93009,80020,200

.67

.973,506M

.71 IN

.73 IN

JUL

26,80020,60028,80030,00030,300

30,60029,90029,10028,10026,100

24,20022,00019,20016,40016,200

17,90019,20019,60020,50021,100

19,60019,10018,80018,40018,700

19,50021,20023,20024,20024,60025,100

719,40023,21030,60016,200

.34

.401,427*

AUG

24,30023,30022,30022,00020,600

23,60028,70034,00033,10030,300

26,40025,30026,40031,40032,900

32,30031,60030,90029,50029,100

28,60026,100 '30,50035,30039,200

39,20035,40033,30029,50025,30022,200

904,60029,18039,20020,600

.45

.SO1794*

9.65 AC-FT 34,7209.93 AC-FT 35,730

SEP

21,30025,10027,60029,00028,400

29,40030,00029,80030,00028,700

27,10025,60025,10023,80022,300

20,10018,20018,50018,70017,400

16,60016,70017,80018,00020,600

25,50028,60031,50035,60037,500

744,70020,82037,50016,600

.37

.411,477M

,000,000

B Expressed in thousands.

32 TURKEY RITER BASIR

05411600 TORKET RXTBR IT SPILMILLB, IORA

LOCATIOl. Lat 431228, long 91*56' 56". in SB1/4 W1/4 sec. 19, T.97 l. r R.9 >., Rinaeshiek Coanty, mi right bank 60 ft (18 ) dovnstreaa froa bridge oa coaaty highway II* at north edge of Spillville, 150 ft (46 a) domstrea* fro* old aill da*, 0.6 ai (t.O ka) npstreaa froa Reader Creek and at aile 98. S (158.5 k*).

DRAIBAGB ABBA. 177 ai (458 ka) .

PERIOD or RECORD. Jnae 1956 to Septeaber 1973 (discontinued). Honthly discharge only for soae periods, published in BSP 1728.

6AGR. later- stage recorder. Data* of gage is 1,034.77 ft (315.00 a) a bore aeaa sea level.

AVERAGE DISCHARGE. 17 years. 109 ft*/* (3.09 a'/sj , 8.36 in/yr (212 nun/yr) , 78,970 acre-ft/yr (97. 4 haVyr).

BITREBRS. Carreat year: Raziaaa discharge, 1,070 ft/s (115 a/s) Hay 2, gage height, 12.64 ft (3.853 a) j atniaoa daily, 51 ft/ O-M "/*) g 30, Sept. 1.

Period of record: Haziana discharge, 8,600 ft'/s (2*4 a'/s) July 12, 1972, gage height, 16.73 ft (5.099 a) , ainiana daily, 4.4 ft/a (125 An' /a) Feb. 1-3, 1959.

Flood in Jaae 1947 reached a stage of 18.4 ft (5.61 a), froa floodaark, discharge, about 10,000 ft/ (283

RB8ARKS. Records good except those for viater period, vhich are poor. Records of periodic cheaical and suspendad-sediaeat analyses for the current year are pablished in Part 2 of this report.

DAY OCT

DISCHARGE, IN CU8IC FEET PER SECOND, MATER YEAR OCTOBER 1972 TO SEPTEMBER 1973

NOV DEC JAN FEB MAR APR MAY JUN JUL AUB BKP

1234S

6769

10

1112131415

16It161920

2122232425

262728293031

TOTALMEAN*AJ!LPINCFSMI 1*.AC-FT

CAL YRKTR YR

379328301446436

371429340289265

252236226217205

202i'3166182182

206268

1,040l,06o

431

327285256234

.220

10,440 9337

I., ,060182

1.902.19

20,710 19

1972 TOTAL1973 TOTAL

784916733401329

299521667392336

310267270255242

233229221215210

206203198195195

196191185182I6o

,781326

i 9 '^1601.642.06,400

73,7*19,832

16Q177163160157

154152ISOISO148

146144142140138

136135134140144

148152154156156

160160160160

1,2009flO

6,498210

1,200134

1.19,I.ST12,890

MEAN

280 650220 BOO200 280196 240192 260

190 210165 160180 140175 140170 137

166 134162 132160 126157 120153 US

150 110500 110

1,600 108600 108230 106

210 106200 105160 120170 140160 115

160 105ISO 102165 100

155 HIIII

7,956 5,079257 161

1/600 800ISO 100

1.45 1.02t,.67 1.07

iSyrsO 10,070

270350230210190

180349336234229

1,370777430

1,110912

550426346300277

260246240244262

323271247236232225

11,666363

1,370160

2.162.49

23,540

202 ' MAX 4,68o MlN 15MEAN 260 MAX 3,000 MlN 51

PEAK DISCHARGE

DATE

10-2412-301-18

TIHE G. H DISCHARGE

0245 8.73

~**

1,7802,3001,900

DATE TINE

2-13-11 19453-14 2330

G. H.

__8.928.56

246311276244230

217207205200181

179196249567

1,460

3,0001,670

690518454

402374342299282

266246233231 336

14,315477

3,000179

2.693.01

28,390

CFSM 1.14CFSM 1.47

1,3202,9501,260569476

451968

2,170BIBS34

4403943S2317296

280261244234223

213209200197193

186209299348 269233

17,133 5532,950

1863.123.60

33,980

IN 15.51IN 19,93

207196195195279

291204183161146

139138131126124

129219288416247

164162148136130

124126127119 110

5,384179416110

1.011.13

10,660

AC-FTAC-FT

105107109128129

1099994906B

8684B46282

7977737171

7576787472

71706967 6766

2,63184.912966.48.55

5,220

146,400166,100

6464626666

666771B976

6966666663

6159SB5756

S6SB6159SB

5553525251 52

1,91961.9

89SI.35.40

3,810

SSSIS3SS34

54S355SB56

56SSssSS56

5760615958

5962626266

667684S397

1,83061.0

9751.34.38

3,630

(BASE, 1,200 FTVS)

DISCHARGE

* 1,5001,7801,620

DATE

4-165-25-8

TINE

151506001245

G. H. DISCHARGE

11.9212.6410.56

3,5004,0702,640

* About

TURRET BITER BASIN

05412500 TORKBT RIVER IT GARBBR, IOIA

33

LOCATION. tat 4244'24, long 9115'42", in SB1/4 *1/4 sec.36, T.92 ., R.4 ., Clayton County, on left bank 10 ft (3 ) downstream from bridge on county highway C43, 800 ft (244 ) upstream from ayman Creek, 1,000 ft (305) southeast of Garber, 2,000 ft (610 ) downstream from Elk creek, 1 ! (1.6 km) downstream fro Volga River, and 19.8 mi (31.9 km) upstream from mouth.

DBA WAGE AREA.1,545 mi* (4,002km*).

PERIOD OF RECORD.August 1913 to Hovember 1916, Hay 1919 to September 1927, April 1929 to September 1930, October 1932 to current year. Monthly discharge only for some periods, published in WSP 1308.

GAGE.Hater-stage recorder. Datum of gage is 634.46 ft (193.38 m) above mean sea level. Prior to Feb. 7, 1935, nonrecording gage at same site and datum.

AVERAGE DISCHARGE.53 years (1913-16, 1919-27, 1929-30, 1932-73), 898 ft'/s (25.4 m/a), 7.89 in/yr (200/yr), 650,600 acre-ft/yr (802 hm/yr).

EXTREMES. Current year: Maximum discharge, 19,600 ft/s (555 m*/s) Apr. 16, gage height, 22.88 ft (.974, m); minimum daily, 439 ft/s (12.4 mVs) Sept. 16.

Period of record: Hazimum discharge, 32,300 ft'/s (915 m'/s) Feb. 23, 1922, gage height, 28.06 ft (8.553 m), from flocdmark; minimum daily, 49 ft'/s (1.39 m'/s) Jan. 28, 29, 1940.

(lazimum stage since at least 1890, that of Feb. 23, -1922.

RBHARKS.Records good ezcept those for winter period, which are poor. Records of periodic chemical analyses for the current year are published in Part 2 of this report.

COOPERATIOH.Three discharge measurements furnished by corps of engineers.

REVISIOIS (RATER IEARS).SP 1308: 1922-25 (H), 1927 (H) . VSP 1438: Drainage area.

DISCHARGE* IN CUBIC FEET PER SECOND, MATER YEAR OCTOBER 1972 TO SEPTEMBER 19?3

DAY OCT NOV DEC JAN FEB NAR APR MAY JUN JUt AOG SEP

1 4,7702 3,0003 2,4604 2,1905 2,230

6 2,3607 2,1308 2,2109 2,00010 1,740

11 1,67012 1,55013 1,46014 1,40015 1,340

16 1,30017 1,26018 1,21019 1,17020 1,150

21 1,28022 1.75023 6,50024 7,12025 5,710

26 4,05027 3.15028 2,70029 2,41030 2,18031 2,380

TOTAL 77,830MEAN 2,511MAX 7,120NIN 1,150CFSM 1.63IN. 1.87AC-FT 154,400

3,3005,3105,7104,5203,390

2,8402,7303*0203,5402,780

2,4302,2202,0801,9801,850

1,7601,6901,6201,5401,480

1,4401,4001,3601,3201,330

1,3501,3101,2401,1701,160

68,8702,2965,7101,1601.491.66

136,600

CAL YR 1972 TOTAL 509,MTR VR 1973 TOTAL 763,

1,1601,1301,050

922855

810790770760750

740730720710710

705705720740750

755760760750740

730720710700

5,4008,380

36*6321,1828,380700.77.88

72,660

832 MEAN485 MEAN

4,8402,8002,0001,8001,700

1,6001,5201,4701,4201,380

1,3401,3001,2701,2401,200

1,5005,00012,0007,0003,940

2,7802,3101,8901,5701,580

1*6901,7601,8401*9801*1701*220

75,5102,43612,0001*1701.581.82

149,800

1,3932.092

1,7708,5904,2302,6702,410

2*1401,7401,4401,1001,000

950910880860840

820800790780770

760750750740730

720710700

-----------

41,3501.4778*590700.961.00

82*020

MAX 13*300MAX 19,100

8501,2001,4001,5001,600

1,6802,8203,0202,1201,610

7,6508,7805,4508,5208,510

5,9804,5303,6403.1002*710

2*4602*2502*0901.9701*910

1,8501,8901.7901.6SO1*5501,510

97*5503,1478,780850

2.042.35

193*500

MINMIN

1,7001,7701,7801,7801,650

1,5401*4601*4001*4101,260

1,2001,3101,5*02,96010*000

19,10017,20012*1006,4105.860

5,6104*5303,8809*4503*070

2,8102*5802*3802*2702*220

126,2804*20919,1001*2002.729.04

250*500

190 CFSM439 CFSM

2*4705*0008,6206*2703*810

3,2606*76011*90011*0006,600

4,4903,8003,3102*9402,660

2,4602,2602*1102*0101*880

1*7801*7401*6801*6901.770

1.5801.9402,8502,9902,6102,260

116,9809*79411.9001