LOCATION.-- Lat 39°35'00", long 88°24'48" (NAD of 1927), in NW1/4SW1/4 sec.10, T.13 N., R.7 E., Coles County, Hydrologic Unit 07140201, on right upstream side of bridge in Cooks Mills, 3.8 mi downstream from Flat Branch, and at mile 238.1. |
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DRAINAGE AREA.-- 473 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: August 1970 to current year. |
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STAGE: Water years 1994-2002. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1977-91. Additional chemical data for water years 1961-68, 1971-72 are published in Water-Resources Investigations 78-24 and 79-25 as site O 02. |
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SEDIMENT: January 1979 to September 1997. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 617.40 ft above NGVD of 1929. Prior to July 30, 1981, at site 200 ft downstream at same datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 11,000 ft3/s, May 13, 2002, gage height, 17.85 ft; no flow Sept. 11, 1988. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 1,710 mg/L, May 1, 1983; minimum daily, 0 mg/L, Sept. 10, 11, 1988. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 26,100 tons, Apr. 13, 1979; minimum daily, 0 ton, Sept. 10, 11, 1988. |
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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 |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 20 | 348 | 657 | e180 | 1530 | e480 | 1840 | 2820 | 774 | 221 | 26 | 24 |
2 | 18 | 307 | 677 | e170 | 2900 | e510 | 1400 | 2120 | 650 | 201 | 23 | 22 |
3 | 18 | 273 | 633 | e160 | 3250 | 768 | 1050 | 1610 | 547 | 186 | 21 | 20 |
4 | 18 | 246 | 524 | e160 | 2640 | 908 | 847 | 1240 | 473 | 170 | 19 | 18 |
5 | 21 | 218 | 422 | e160 | 1900 | 1030 | 690 | 972 | 422 | 157 | 19 | 17 |
6 | 27 | 194 | 352 | e165 | 1350 | 983 | 574 | 1030 | 429 | 141 | 18 | 17 |
7 | 31 | 181 | 308 | e170 | 998 | 891 | 502 | 2140 | 481 | 126 | 17 | 16 |
8 | 38 | 172 | 276 | e170 | 802 | 821 | 503 | 3650 | 466 | 110 | 16 | 15 |
9 | 30 | 161 | 244 | 188 | 657 | 941 | 631 | 4130 | 428 | 96 | 16 | 14 |
10 | 25 | 154 | 218 | 183 | 560 | 1160 | 747 | 3850 | 426 | 91 | 17 | 14 |
11 | 29 | 146 | 197 | 166 | 503 | 1340 | 809 | 3400 | 468 | 83 | 17 | 13 |
12 | 197 | 137 | 188 | 151 | 481 | 1300 | 757 | 6180 | 1310 | 74 | 18 | 11 |
13 | 405 | 132 | 251 | 142 | 466 | 1060 | 702 | 10700 | 1750 | 64 | 17 | 11 |
14 | 1470 | 125 | 423 | 142 | 437 | 885 | 714 | 10200 | 1860 | 56 | 17 | 11 |
15 | 1720 | 118 | 656 | 140 | 395 | 766 | 692 | 8210 | 1630 | 50 | 18 | 11 |
16 | 1390 | 113 | 777 | 132 | 366 | 730 | 617 | 5810 | 1300 | 45 | 19 | 14 |
17 | 1230 | 106 | 1420 | 122 | 340 | 699 | 540 | 3990 | 999 | 42 | 19 | 16 |
18 | 998 | 101 | 2160 | 114 | 305 | 651 | 474 | 3020 | 791 | 37 | 46 | 16 |
19 | 838 | 101 | 2320 | 107 | 283 | 598 | 429 | 2490 | 631 | 34 | 45 | 18 |
20 | 670 | 99 | 2160 | 117 | 405 | 556 | 423 | 2000 | 517 | 31 | 35 | 23 |
21 | 490 | 96 | 1680 | 120 | 933 | 518 | 732 | 1550 | 437 | 34 | 104 | 23 |
22 | 356 | 95 | 1220 | 116 | 2020 | 477 | 2220 | 1220 | 385 | 38 | 90 | 28 |
23 | 360 | 94 | 947 | 109 | 2080 | 436 | 3230 | 995 | 356 | 112 | 49 | 33 |
24 | 627 | 102 | 783 | 107 | 1580 | 409 | 2760 | 855 | 337 | 60 | 66 | 22 |
25 | 963 | 141 | 661 | 109 | 1180 | 557 | 2470 | 753 | 337 | 48 | 194 | 17 |
26 | 1000 | 128 | 553 | 104 | 943 | 745 | 2580 | 665 | 348 | 43 | 138 | 16 |
27 | 984 | 120 | e420 | 97 | e700 | 856 | 2720 | 598 | 353 | 38 | 90 | 14 |
28 | 908 | 131 | e360 | 97 | e560 | 993 | 3560 | 658 | 324 | 38 | 57 | 13 |
29 | 753 | 264 | e300 | 101 | --- | 1290 | 3910 | 733 | 280 | 35 | 41 | 13 |
30 | 573 | 518 | e250 | 132 | --- | 1740 | 3640 | 857 | 244 | 31 | 33 | 12 |
31 | 430 | --- | e200 | 574 | --- | 2070 | --- | 874 | --- | 28 | 28 | --- |
TOTAL | 16637 | 5121 | 22237 | 4705 | 30564 | 27168 | 42763 | 89320 | 19753 | 2520 | 1333 | 512 |
MEAN | 536.7 | 170.7 | 717.3 | 151.8 | 1092 | 876.4 | 1425 | 2881 | 658.4 | 81.29 | 43.00 | 17.07 |
MAX | 1720 | 518 | 2320 | 574 | 3250 | 2070 | 3910 | 10700 | 1860 | 221 | 194 | 33 |
MIN | 18 | 94 | 188 | 97 | 283 | 409 | 423 | 598 | 244 | 28 | 16 | 11 |
CFSM | 1.13 | 0.36 | 1.52 | 0.32 | 2.31 | 1.85 | 3.01 | 6.09 | 1.39 | 0.17 | 0.09 | 0.04 |
IN. | 1.31 | 0.40 | 1.75 | 0.37 | 2.40 | 2.14 | 3.36 | 7.02 | 1.55 | 0.20 | 0.10 | 0.04 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1971 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 179.1 | 314.9 | 523.2 | 468.0 | 653.3 | 762.0 | 747.9 | 824.9 | 539.3 | 279.5 | 175.5 | 101.1 |
MAX | 1189 | 2205 | 1626 | 1862 | 2028 | 2565 | 2116 | 2881 | 1864 | 1166 | 952 | 817 |
(WY) | 1994 | 1993 | 1988 | 1974 | 1982 | 1979 | 1994 | 2002 | 1974 | 1973 | 1981 | 1993 |
MIN | 12.7 | 24.4 | 16.7 | 14.2 | 63.4 | 132 | 85.5 | 103 | 48.0 | 16.8 | 14.9 | 10.4 |
(WY) | 1985 | 1977 | 1977 | 1977 | 1977 | 1992 | 1971 | 1976 | 1988 | 1988 | 1988 | 1999 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1971 - 2002 | |||
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ANNUAL TOTAL | 145494 | 262633 | ||||
ANNUAL MEAN | 398.6 | 719.5 | 463.1 | |||
HIGHEST ANNUAL MEAN | 838 | 1973 | ||||
LOWEST ANNUAL MEAN | 185 | 1980 | ||||
HIGHEST DAILY MEAN | 3350 | Feb 27 | 10700 | May 13 | 10700 | May 13 2002 |
LOWEST DAILY MEAN | 18 | A | 11 | Sep 12-15 | 0.00 | Sep 11 1988 |
ANNUAL SEVEN-DAY MINIMUM | 19 | Sep 28 | 12 | Sep 9 | 2.7 | Sep 8 1988 |
MAXIMUM PEAK FLOW | 11000 | May 13 | 11000 | May 13 2002 | ||
MAXIMUM PEAK STAGE | 17.85 | May 13 | 17.85 | May 13 2002 | ||
INSTANTANEOUS LOW FLOW | 11 | Sep 12-15 | ||||
ANNUAL RUNOFF (CFSM) | 0.84 | 1.52 | 0.98 | |||
ANNUAL RUNOFF (INCHES) | 11.44 | 20.66 | 13.30 | |||
10 PERCENT EXCEEDS | 1140 | 1850 | 1240 | |||
50 PERCENT EXCEEDS | 189 | 352 | 180 | |||
90 PERCENT EXCEEDS | 28 | 19 | 20 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |