Station list     Available data
ROCK RIVER BASIN


05447500       GREEN RIVER NEAR GENESEO, IL

 

LOCATION.-- Lat 41°29'20", long 90°09'27" (NAD of 1927), in NE1/4SW1/4 sec.4, T.17 N., R.3 E., Henry County, Hydrologic Unit 07090007, on right bank at upstream side of bridge on State Highway 82, 1.4 mi upstream from Geneseo Creek, 2.4 mi north of Geneseo, and at mile 14.9.

 

DRAINAGE AREA.-- 1,003 mi2.

 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

 

DISCHARGE: March 1936 to current year.

 

STAGE: Water years 1994-2002.

SURFACE-WATER QUALITY

 

SEDIMENT: March 1978 to September 1981.

 

CHEMICAL: Water years 1978-91.

 

REVISED RECORDS.-- WSP 875: 1938. WSP 1508: 1937, 1939-41(M), 1946(P), 1947-49. WDR IL-74-1: Drainage area.

 

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 577.66 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Oct. 1, 1939, nonrecording gage at present site at datum 27.00 ft. lower. Oct. 1, 1939 to Apr. 3, 1940, nonrecording gage at present site at datum 3.0 ft. higher. Apr. 3, 1940 to Sept. 30, 1997, recording gage at present site at datum 3.0 ft. higher.

 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 12,100 ft3/s, June 22, 1974, gage height, 19.75 ft, present datum; maximum gage height, 21.59 ft, present datum, Jan. 23, 1969, ice jam; minimum daily discharge, 22 ft3/s, Jan. 18, 1977.

SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 8,620 mg/L Apr. 14, 1981; minimum daily mean, 17 mg/L Jan. 15, 16, 1979.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 132,000 tons Apr. 14, 1981; minimum daily, 7.3 tons Jan. 15, 16, 1979.

 

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
1136 427 433 e310 337 661 575 1140 932 1090 335 224 
2134 408 418 e310 266 646 629 1060 894 983 302 215 
3130 380 402 e310 257 516 833 1010 872 905 274 205 
4135 365 394 e315 196 708 793 930 3170 840 309 199 
5222 349 384 e320 264 1070 731 872 8760 781 516 186 
 
6321 340 380 e325 308 917 691 840 7250 792 468 177 
7263 334 375 e330 287 687 738 810 6150 859 364 172 
8218 327 368 e340 288 970 1380 768 5150 750 302 167 
9195 317 361 e345 289 1710 2990 788 4320 714 271 169 
10194 310 347 e350 309 1670 2920 780 3560 774 253 159 
 
11216 309 344 e355 431 1410 2250 1130 3010 687 236 155 
12221 298 344 e355 491 1160 1760 5680 2730 639 226 150 
13222 295 388 e350 511 1030 1440 6240 3380 599 326 148 
14293 314 429 e340 509 954 1270 4960 2930 567 350 147 
15347 325 436 e330 495 887 1160 3890 2400 536 311 145 
 
16315 319 421 e320 494 819 1060 3090 2040 508 298 143 
17288 307 414 e310 486 765 968 2790 1760 482 263 139 
18268 296 412 e300 462 744 897 2570 1580 465 245 139 
19252 291 410 e310 476 711 852 2140 1440 481 474 142 
20236 290 398 e315 724 694 801 1820 1330 460 566 144 
 
21231 285 386 e320 1190 667 843 1580 1250 432 375 155 
22234 284 382 e330 1100 611 885 1420 1180 405 334 155 
23533 278 392 e335 963 653 860 1330 1120 384 457 146 
24938 299 306 e330 870 633 860 1270 1060 368 630 139 
25933 375 e400 e310 797 598 984 1420 1010 359 426 135 
 
26824 515 e390 e290 752 587 934 1520 1410 350 384 143 
27680 502 e380 263 683 565 919 1320 2690 737 326 136 
28575 469 e360 257 678 554 1340 1190 2200 793 288 137 
29512 443 e345 255 --- 573 1440 1110 1510 517 264 139 
30474 433 e330 255 --- 588 1270 1050 1230 430 248 136 
 
31446 --- e320 209 --- 578 --- 988 --- 370 233 --- 

TOTAL1098610484118499694149132533635073575067831819057106544746
MEAN354.4349.5382.2312.7532.6817.3116918552611614.7343.7158.2
MAX938515436355119017102990624087601090630224
MIN130278306209196516575768872350226135
CFSM0.350.350.380.310.530.811.171.852.600.610.340.16
IN.0.410.390.440.360.550.941.302.132.900.710.400.18

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1936 - 2002, BY WATER YEAR (WY)
MEAN387.3456.4461.6535.3765.010371078994.2926.1565.8385.7337.9
MAX213517901905197623183244356235003568294618451777
(WY)199919781983194620011979197319741974199019871970
MIN48.860.457.126.568.819817414012762.961.046.5
(WY)195419541959197719401956195619891977194019881940

SUMMARY STATISTICSFOR 2001 CALENDAR YEARFOR 2002 WATER YEARWATER YEARS 1936 - 2002
ANNUAL TOTAL259698     288616         
ANNUAL MEAN711.5  790.7      661.7      
HIGHEST ANNUAL MEAN1579         1993
LOWEST ANNUAL MEAN159         1940
HIGHEST DAILY MEAN5950         Feb 258760             Jun 510100         Mar 19 1979
LOWEST DAILY MEAN105         Sep 5130             Oct 322         Jan 18 1977
ANNUAL SEVEN-DAY MINIMUM111         Sep 2138             Sep 2424         Jan 17 1977
MAXIMUM PEAK FLOW9520             Jun 512100      AJun 22 1974
MAXIMUM PEAK STAGE17.93        Jun 521.59 BJan 23 1969
INSTANTANEOUS LOW FLOW124      C    Feb 4
ANNUAL RUNOFF (CFSM)0.710.79    0.66    
ANNUAL RUNOFF (INCHES)9.6310.70    8.96    
10 PERCENT EXCEEDS1400     1440         1470         
50 PERCENT EXCEEDS427     433         391         
90 PERCENT EXCEEDS151     213         98         

A - Gage height, 19.75 ft, present datum.

B - Present datum, due to backwater from ice, discharge 8,000 ft3/s.

C - Result of freeze-up.



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data