LOCATION.-- Lat 40°19'49", long 90°53'46" (NAD of 1927), in SE1/4SW1/4 sec.18, T.4 N., R.4 W., McDonough County, Hydrologic Unit 07130010, on right bank at downstream side of bridge on State Highway 61, 0.2 mi downstream from a railroad bridge, 1 mi southwest of Colmar, 1.8 mi upstream from Troublesome Creek, and at mile 61.8. |
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DRAINAGE AREA.-- 655 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1944 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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CHEMICAL: Water years 1975-91 and 1998. |
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MISCELLANEOUS: Contaminants in streambed sediments, July 1997; contaminants in fish tissue, July 1997; streambank sediment size, October 1997; streambed sediment size, October 1997. |
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BIOLOGICAL |
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BENTHIC MACROINVERTEBRATES: Water years 1996-1998. |
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FISH: Water year 1997 and 1998. |
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HABITAT: Water years 1996-1998. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and crest-stage gage. Datum of gage is 491.53 ft above NGVD of 1929. Prior to July 13, 1945, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 38,900 ft3/s, Mar. 5, 1985, gage height, 26.61 ft; maximum gage height, 27.03 ft, Jan. 3, 1965, ice jam; no flow part of each day Dec. 8, 9, 12, 13, 17, 21, 1955, due to temporary dam upstream; no flow Oct. 19, 1988. |
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REMARKS FOR CURRENT YEAR.-- Records good except those for Aug. 4-15, which are fair, and those for estimated daily discharges, which are poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 20 | 29 | e24 | 37 | e30 | e60 | 83 | 276 | 134 | 148 | 42 | 652 |
2 | 20 | 29 | e23 | 40 | e35 | e51 | 73 | 429 | 127 | 125 | 53 | 342 |
3 | 22 | 28 | e22 | 40 | e40 | e47 | 68 | 321 | 124 | 109 | 48 | 121 |
4 | 26 | 26 | e20 | 38 | e47 | e49 | 81 | 262 | 139 | 99 | 31 | 64 |
5 | 26 | 27 | e19 | 38 | e60 | e45 | 114 | 768 | 130 | 89 | 27 | 39 |
6 | 31 | 26 | 21 | 37 | e54 | e44 | 133 | 809 | 125 | 81 | 25 | 27 |
7 | 33 | 26 | 22 | 33 | e44 | e46 | 133 | 452 | 167 | 72 | 23 | 20 |
8 | 29 | 28 | 21 | 40 | e36 | e64 | 161 | 340 | 201 | 183 | 21 | 15 |
9 | 24 | 25 | 19 | 39 | e33 | e90 | 160 | 433 | 181 | 1920 | 19 | 13 |
10 | 20 | 25 | 21 | 34 | e30 | e120 | 142 | 884 | 159 | 1740 | 18 | 11 |
11 | 18 | 26 | 20 | e26 | e29 | e140 | 124 | 2110 | 191 | 1200 | 16 | 10 |
12 | 16 | 25 | 22 | e29 | e28 | e96 | 114 | 1800 | 177 | 755 | 15 | 9.3 |
13 | 15 | 24 | 22 | e27 | e28 | e150 | 104 | 835 | 150 | 351 | 15 | 12 |
14 | 15 | 25 | 22 | e24 | e30 | e270 | 94 | 595 | 140 | 231 | 15 | 52 |
15 | 15 | 25 | 25 | e22 | e50 | 251 | 86 | 501 | 126 | 178 | 15 | 53 |
16 | 14 | 25 | 27 | e21 | e155 | 187 | 83 | 431 | 112 | 148 | 13 | 43 |
17 | 14 | 24 | 29 | e20 | e135 | 170 | 161 | 369 | 100 | 123 | 12 | 32 |
18 | 15 | 23 | 41 | e20 | e115 | 160 | 176 | 328 | 93 | 737 | 11 | 23 |
19 | 15 | 24 | 97 | e19 | e95 | 146 | 155 | 297 | 89 | 1200 | 11 | 19 |
20 | 16 | 25 | 109 | e19 | e80 | 144 | 143 | 275 | 88 | 333 | 9.9 | 15 |
21 | 16 | 24 | 103 | e19 | e150 | 131 | 142 | 248 | 89 | 184 | 9.5 | 14 |
22 | 16 | 23 | 69 | e19 | e340 | 116 | 132 | 217 | 77 | 135 | 8.9 | 34 |
23 | 16 | 23 | 50 | e18 | e270 | 96 | 115 | 204 | 73 | 105 | 8.3 | 192 |
24 | 15 | 23 | 40 | e18 | e200 | 82 | 106 | 196 | 71 | 84 | 7.8 | 93 |
25 | 17 | 23 | e34 | e19 | e130 | 76 | 306 | 189 | 74 | 71 | 7.6 | 59 |
26 | 19 | 22 | e35 | e19 | e92 | 80 | 433 | 179 | 312 | 62 | 7.6 | 45 |
27 | 23 | e22 | 36 | e20 | e82 | 80 | 258 | 163 | 614 | 55 | 7.4 | 40 |
28 | 23 | e22 | 34 | e21 | e68 | 81 | 188 | 151 | 341 | 53 | 7.3 | 62 |
29 | 26 | e22 | 33 | e23 | --- | 99 | 185 | 142 | 212 | 55 | 8.2 | 50 |
30 | 27 | e23 | 35 | e25 | --- | 109 | 163 | 154 | 171 | 54 | 38 | 33 |
31 | 30 | --- | 37 | e27 | --- | 99 | --- | 139 | --- | 50 | 45 | --- |
TOTAL | 632 | 742 | 1132 | 831 | 2486 | 3379 | 4416 | 14497 | 4787 | 10730 | 595.5 | 2194.3 |
MEAN | 20.4 | 24.7 | 36.5 | 26.8 | 88.8 | 109 | 147 | 468 | 160 | 346 | 19.2 | 73.1 |
MAX | 33 | 29 | 109 | 40 | 340 | 270 | 433 | 2110 | 614 | 1920 | 53 | 652 |
MIN | 14 | 22 | 19 | 18 | 28 | 44 | 68 | 139 | 71 | 50 | 7.3 | 9.3 |
CFSM | 0.03 | 0.04 | 0.06 | 0.04 | 0.14 | 0.17 | 0.22 | 0.71 | 0.24 | 0.53 | 0.03 | 0.11 |
IN. | 0.04 | 0.04 | 0.06 | 0.05 | 0.14 | 0.19 | 0.25 | 0.82 | 0.27 | 0.61 | 0.03 | 0.12 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 258 | 258 | 261 | 339 | 542 | 709 | 818 | 786 | 708 | 456 | 167 | 253 |
MAX | 3502 | 2693 | 2686 | 2077 | 2384 | 3734 | 3193 | 4471 | 3081 | 4194 | 899 | 4024 |
(WY) | 1987 | 1986 | 1983 | 1974 | 2001 | 1985 | 1973 | 1995 | 1974 | 1993 | 1993 | 1961 |
MIN | 0.67 | 2.61 | 2.54 | 3.33 | 5.70 | 30.5 | 22.9 | 20.8 | 21.1 | 3.89 | 2.82 | 1.75 |
(WY) | 1989 | 1990 | 1990 | 1956 | 1989 | 1956 | 1956 | 1956 | 1988 | 1988 | 1988 | 1988 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1945 - 2003 | |||
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ANNUAL TOTAL | 272937 | 46421.8 | ||||
ANNUAL MEAN | 748 | 127 | 462 | |||
HIGHEST ANNUAL MEAN | 1347 | 1993 | ||||
LOWEST ANNUAL MEAN | 23.1 | 1989 | ||||
HIGHEST DAILY MEAN | 22700 | May 13 | 2110 | May 11 | 35600 | Mar 5 1985 |
LOWEST DAILY MEAN | 14 | Oct 16, 17 | 7.3 | Aug 28 | 0.00 | Oct 19 1988 |
ANNUAL SEVEN-DAY MINIMUM | 15 | Oct 13 | 7.7 | Aug 23 | 0.12 | Oct 16 1988 |
MAXIMUM PEAK FLOW | 2270 | May 11 | 38900 A | Mar 5 1985 | ||
MAXIMUM PEAK STAGE | 15.95 | May 11 | 27.03 B | Jan 3 1965 | ||
INSTANTANEOUS LOW FLOW | 7.1 | Aug 28 | ||||
ANNUAL RUNOFF (CFSM) | 1.14 | 0.19 | 0.70 | |||
ANNUAL RUNOFF (INCHES) | 15.50 | 2.64 | 9.58 | |||
10 PERCENT EXCEEDS | 1520 | 270 | 1010 | |||
50 PERCENT EXCEEDS | 145 | 48 | 125 | |||
90 PERCENT EXCEEDS | 22 | 16 | 10 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |