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. |
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DRAINAGE AREA.-- 1,003 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: March 1936 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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SEDIMENT: March 1978 to September 1981. |
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CHEMICAL: Water years 1978-91. |
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REVISED RECORDS.-- WSP 875: 1938. WSP 1508: 1937, 1939-41(M), 1946(P), 1947-49. WDR IL-74-1: Drainage area. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter 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. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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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. |
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SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 8,620 mg/L Apr. 14, 1981; minimum daily mean, 17 mg/L Jan. 15, 16, 1979. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 132,000 tons Apr. 14, 1981; minimum daily, 7.3 tons Jan. 15, 16, 1979. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 70 | 80 | 135 | 366 | e150 | 418 | 1090 | 499 | 5340 | 499 | 207 | 205 |
2 | 70 | 85 | 126 | 361 | e160 | 424 | 1010 | 500 | 3910 | 475 | 200 | 180 |
3 | 71 | 152 | 127 | 356 | e170 | 407 | 923 | 493 | 2930 | 461 | 202 | 164 |
4 | 71 | 211 | 131 | e350 | e180 | 403 | 854 | 473 | 2240 | 478 | 261 | 155 |
5 | 71 | 262 | 138 | e347 | e200 | 968 | 790 | 459 | 1810 | 452 | 304 | 140 |
6 | 71 | 243 | 141 | e343 | e210 | 1320 | 744 | 434 | 1550 | 565 | 233 | 131 |
7 | 70 | 185 | 139 | e340 | e220 | 1090 | 709 | 521 | 1370 | 553 | 207 | 126 |
8 | 69 | 159 | 134 | e337 | e210 | 927 | 672 | 602 | 1220 | 489 | 195 | 123 |
9 | 70 | 145 | 141 | e333 | e200 | 811 | 637 | 517 | 1100 | 445 | 184 | 121 |
10 | 71 | 138 | 1730 | e330 | e195 | 714 | 600 | 484 | 1080 | 462 | 175 | 117 |
11 | 71 | 134 | 2870 | e327 | e185 | 661 | 574 | 823 | 1670 | 452 | 172 | 117 |
12 | 70 | 133 | 1590 | e323 | e175 | 582 | 555 | 828 | 1610 | 426 | 170 | 111 |
13 | 71 | 118 | 1090 | e320 | e165 | 594 | 535 | 1020 | 1380 | 396 | 167 | 103 |
14 | 87 | 111 | 915 | e317 | e160 | 565 | 524 | 1290 | 1400 | 368 | 159 | 103 |
15 | 103 | 111 | 806 | e313 | e155 | 542 | 501 | 1670 | 1480 | 359 | 149 | 107 |
16 | 93 | 114 | 730 | e300 | e150 | 536 | 479 | 1720 | 1200 | 335 | 140 | 143 |
17 | 87 | 117 | 645 | e340 | e145 | 528 | 462 | 1340 | 1060 | 320 | 138 | 149 |
18 | 81 | 184 | 600 | e300 | e140 | 535 | 437 | 1500 | 962 | 308 | 159 | 114 |
19 | 78 | 246 | 559 | e270 | e220 | 541 | 426 | 1700 | 875 | 299 | 175 | 100 |
20 | 77 | 211 | 442 | e240 | e400 | 534 | 429 | 1460 | 812 | 288 | 169 | 96 |
21 | 74 | 188 | 471 | e210 | 935 | 520 | 520 | 1350 | 785 | 293 | 151 | 95 |
22 | 73 | 173 | 520 | e180 | 779 | 490 | 574 | 1290 | 788 | 294 | 138 | 91 |
23 | 73 | 169 | 491 | e170 | 898 | 471 | 555 | 2130 | 746 | 305 | 129 | 90 |
24 | 74 | 161 | 424 | e165 | e700 | 485 | 522 | 2040 | 699 | 292 | 131 | 91 |
25 | 79 | 155 | 363 | e160 | e600 | 557 | 539 | 1710 | 663 | 282 | 144 | 90 |
26 | 80 | 154 | 374 | e170 | e520 | 892 | 555 | 1500 | 624 | 269 | 166 | 87 |
27 | 81 | 147 | 420 | e180 | e460 | 1300 | 539 | 1280 | 596 | 259 | 168 | 88 |
28 | 83 | 141 | 414 | e170 | e410 | 1200 | 506 | 1130 | 579 | 247 | 247 | 86 |
29 | 80 | 132 | 400 | e160 | 410 | 1180 | 486 | 997 | 553 | 232 | 362 | 84 |
30 | 81 | 138 | 394 | e155 | --- | 1230 | 484 | 2150 | 525 | 219 | 303 | 84 |
31 | 82 | --- | 381 | e153 | --- | 1140 | --- | 5310 | --- | 214 | 243 | --- |
TOTAL | 2382 | 4697 | 17841 | 8386 | 9502 | 22565 | 18231 | 39220 | 41557 | 11336 | 5948 | 3491 |
MEAN | 76.8 | 157 | 576 | 271 | 328 | 728 | 608 | 1265 | 1385 | 366 | 192 | 116 |
MAX | 103 | 262 | 2870 | 366 | 935 | 1320 | 1090 | 5310 | 5340 | 565 | 362 | 205 |
MIN | 69 | 80 | 126 | 153 | 140 | 403 | 426 | 434 | 525 | 214 | 129 | 84 |
CFSM | 0.08 | 0.16 | 0.57 | 0.27 | 0.33 | 0.73 | 0.61 | 1.26 | 1.38 | 0.36 | 0.19 | 0.12 |
IN. | 0.09 | 0.17 | 0.66 | 0.31 | 0.35 | 0.84 | 0.68 | 1.45 | 1.54 | 0.42 | 0.22 | 0.13 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1936 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 379 | 448 | 459 | 525 | 749 | 1020 | 1058 | 1004 | 924 | 560 | 379 | 331 |
MAX | 2135 | 1790 | 1905 | 1976 | 2318 | 3244 | 3562 | 3500 | 3568 | 2946 | 1845 | 1777 |
(WY) | 1999 | 1978 | 1983 | 1946 | 2001 | 1979 | 1973 | 1974 | 1974 | 1990 | 1987 | 1970 |
MIN | 48.8 | 60.4 | 57.1 | 26.5 | 68.8 | 174 | 157 | 140 | 127 | 62.9 | 61.0 | 46.5 |
(WY) | 1954 | 1954 | 1959 | 1977 | 1940 | 2003 | 2003 | 1989 | 1977 | 1940 | 1988 | 1940 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1936 - 2004 | |||
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ANNUAL TOTAL | 112383 | 185156 | ||||
ANNUAL MEAN | 308 | 506 | 654 | |||
HIGHEST ANNUAL MEAN | 1579 | 1993 | ||||
LOWEST ANNUAL MEAN | 159 | 1940 | ||||
HIGHEST DAILY MEAN | 3670 | May 1 | 5340 | Jun 1 | 10100 | Mar 19 1979 |
LOWEST DAILY MEAN | 59 | Aug 28 | 69 | Oct 8 | 22 | Jan 18 1977 |
ANNUAL SEVEN-DAY MINIMUM | 63 | Aug 25 | 70 | Oct 6 | 24 | Jan 17 1977 |
MAXIMUM PEAK FLOW | 5840 | May 31 | 12100 A | Jun 22 1974 | ||
MAXIMUM PEAK STAGE | 13.77 | May 31 | 21.59 B | Jan 23 1969 | ||
INSTANTANEOUS LOW FLOW | 68 | C | ||||
ANNUAL RUNOFF (CFSM) | 0.307 | 0.504 | 0.652 | |||
ANNUAL RUNOFF (INCHES) | 4.17 | 6.87 | 8.86 | |||
10 PERCENT EXCEEDS | 643 | 1200 | 1460 | |||
50 PERCENT EXCEEDS | 147 | 325 | 384 | |||
90 PERCENT EXCEEDS | 72 | 89 | 97 |
B - Present datum, due to backwater from ice, estimated discharge, 8000 ft3/s. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |