Station list     Available data
ROCK RIVER BASIN


05447500       GREEN RIVER NEAR GENESEO, IL



LOCATION.-- Lat 41°29'20", long 90°09'27", 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 1994-2000.

SURFACE-WATER QUALITY
 

SEDIMENT: April 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 sea level (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 (current datum); maximum gage height, 21.59 ft (current datum), Jan. 23, 1969 (backwater from ice); 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 CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAYOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEP
 
1381 187 175 281 e167 1050 334 948 3180 1090 482 197 
2306 195 186 311 e170 912 335 896 3330 978 499 185 
3278 194 185 321 e175 820 335 840 2410 1070 480 182 
4321 197 189 247 e180 761 329 792 1760 2140 447 179 
5326 200 245 204 e185 705 324 748 1400 4110 441 174 
 
6295 196 318 273 e190 644 317 713 1190 2700 491 170 
7271 190 285 248 e200 598 320 686 1050 1810 833 168 
8250 189 258 271 e210 565 330 667 951 1400 738 165 
9244 189 262 308 e220 542 331 734 874 1190 623 162 
10233 186 332 345 e228 519 330 1130 801 1200 515 159 
 
11222 186 308 348 e221 486 335 1220 766 2490 445 172 
12215 184 289 317 e210 464 325 1380 917 3100 403 201 
13212 184 271 287 e230 448 312 1480 1980 2350 377 197 
14209 184 257 246 e210 435 303 1150 2810 1780 358 224 
15205 183 254 246 e220 417 299 986 2440 1350 335 231 
 
16204 183 251 290 e230 408 303 910 1800 1090 310 189 
17203 182 240 248 e215 393 339 867 1400 934 295 176 
18201 182 199 e220 202 383 341 893 1150 837 299 169 
19203 182 215 e190 307 399 384 1820 1010 771 295 163 
20201 183 231 e205 355 434 1530 1380 946 719 281 177 
 
21201 183 e240 e225 336 432 4100 1090 947 676 267 214 
22199 182 e250 e205 409 408 3510 964 849 635 260 218 
23197 188 e220 e190 823 396 2570 892 779 598 256 311 
24195 191 e210 e180 1220 388 2120 820 1040 561 251 367 
25194 188 e198 e170 1560 384 1790 746 3010 529 235 384 
 
26194 186 e192 e165 2460 374 1500 706 3190 504 223 342 
27193 189 e192 e162 2200 372 1330 726 2240 485 218 306 
28189 183 e200 e160 1560 377 1200 731 1640 466 234 281 
29188 179 e210 e160 1220 367 1090 722 1440 e467 229 258 
30186 173 e230 e160 --- 351 1000 682 1290 e468 215 251 
 
31186 --- e260 e162 --- 341 --- 966 --- 469 209 --- 

TOTAL7102559873527345161131557327966292854859038967115446572
MEAN22918723723755650293294516201257372219
MAX381200332348246010504100182033304110833384
MIN186173175160167341299667766466209159
CFSM.23.19.24.24.55.50.93.941.611.25.37.22
IN..26.21.27.27.60.581.041.091.801.45.43.24

e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1936 - 2000, BY WATER YEAR (WY)
MEAN38946046754374510351077984898567389344
MAX213517901905197620703244356235003568294618451777
(WY)199919781983194619491979197319741974199019871970
MIN48.860.457.126.568.819817414012762.961.046.5
(WY)195419541959197719401956195619891977194019881940

SUMMARY STATISTICSFOR 1999 CALENDAR YEARFOR 2000 WATER YEARWATER YEARS 1936 - 2000
ANNUAL TOTAL308284     222007         
ANNUAL MEAN845     607         659         
HIGHEST ANNUAL MEAN1579         1993
LOWEST ANNUAL MEAN159         1940
HIGHEST DAILY MEAN5350         Jun 144110             Jul 510100         Mar 19 1979
LOWEST DAILY MEAN113         Sep 10, 26159             Sep 1022         Jan 18 1977
ANNUAL SEVEN-DAY MINIMUM115         Sep 16162             Jan 2624         Jan 17 1977
INSTANTANEOUS PEAK FLOW4480             Jul 512100      AJun 22 1974
INSTANTANEOUS PEAK STAGE12.55        Jul 521.59 BJan 23 1969
INSTANTANEOUS LOW FLOW140      C    Feb 18
ANNUAL RUNOFF (CFSM).84.60    .66    
ANNUAL RUNOFF (INCHES)11.438.23    8.93    
10 PERCENT EXCEEDS2030     1400         1470         
50 PERCENT EXCEEDS540     319         390         
90 PERCENT EXCEEDS170     183         96         
A - Gage height, 19.75 ft, present datum.
B - Present datum, due to backwater from ice, discharge, 8,000 ft3/s.
C - May have been less during period of ice effect, Jan. 18 to Feb. 17.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data