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 1994-2002. |
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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 rain gage, 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 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 | 32 | 212 | 277 | e130 | e2600 | e300 | e290 | 1900 | 954 | 260 | 66 | 126 |
2 | 32 | 201 | 237 | e125 | e2000 | e450 | e280 | 1500 | 1380 | 238 | 57 | 108 |
3 | 31 | 181 | 209 | e120 | e1500 | e420 | 262 | 1210 | 916 | 221 | e45 | 93 |
4 | 30 | 160 | 198 | e115 | e1200 | e380 | 238 | 954 | 662 | 208 | e38 | 81 |
5 | 105 | 146 | 191 | e120 | e1000 | e360 | 214 | 801 | 1800 | 195 | e33 | 70 |
6 | 164 | 140 | 188 | e125 | e800 | e500 | 209 | 785 | 1740 | 181 | 30 | 61 |
7 | 126 | 136 | 179 | e130 | e640 | e900 | 222 | 856 | 864 | 166 | 35 | 55 |
8 | 91 | 131 | 168 | e135 | e540 | e1000 | 799 | 691 | 651 | 153 | 51 | 50 |
9 | 67 | 129 | 158 | e140 | e500 | e1400 | 2310 | 1660 | 552 | 146 | 37 | 46 |
10 | 57 | 120 | 146 | e145 | e600 | e1300 | 1840 | 1560 | 496 | 137 | 27 | 42 |
11 | 59 | 115 | 141 | e150 | e1400 | e1100 | 1200 | 4160 | 1420 | 133 | 23 | 38 |
12 | 79 | 114 | 144 | e155 | e1250 | e900 | 943 | 15700 | 4700 | 129 | 24 | 34 |
13 | 170 | 109 | 270 | e155 | e1000 | e750 | 777 | 22700 | 7990 | 126 | 24 | 32 |
14 | 309 | 106 | 371 | e155 | e850 | e650 | 648 | 16100 | 10400 | 113 | 29 | 30 |
15 | 355 | 105 | 286 | e140 | e700 | e560 | 591 | 7550 | 12100 | 102 | 26 | 30 |
16 | 960 | 104 | 238 | e130 | e600 | e500 | 527 | 3430 | 8090 | 91 | 26 | 28 |
17 | 393 | 101 | 242 | e120 | e520 | e450 | 458 | 2060 | 3290 | 82 | 194 | 27 |
18 | 249 | 99 | 239 | e115 | e460 | e400 | 411 | 1600 | 1490 | 76 | 108 | 29 |
19 | 186 | 96 | 219 | e120 | e420 | e380 | 378 | 1290 | 954 | 545 | 249 | 29 |
20 | 149 | 101 | 200 | e120 | e500 | e370 | 355 | 1080 | 752 | 1040 | 378 | 31 |
21 | 129 | 100 | 177 | e115 | e1200 | e360 | 995 | 930 | 621 | 215 | 140 | 34 |
22 | 2150 | 93 | 305 | e115 | e1000 | e330 | 1640 | 827 | 541 | 118 | 78 | 33 |
23 | 2570 | 93 | e600 | e120 | e800 | e300 | 1080 | 760 | 484 | 136 | 1950 | 29 |
24 | 2000 | 216 | e500 | e130 | e700 | e290 | 870 | 1370 | 441 | 113 | 3010 | 27 |
25 | 1010 | 784 | e380 | e120 | e600 | e300 | 1750 | 1920 | 403 | 74 | 3210 | 25 |
26 | 596 | 608 | e270 | e110 | e500 | e290 | 1320 | 2150 | 391 | 64 | 1930 | 23 |
27 | 422 | 477 | e210 | e110 | e400 | e280 | 1720 | 1330 | 373 | 80 | 531 | 23 |
28 | 335 | 376 | e220 | e110 | e340 | e270 | 4380 | 1110 | 345 | 91 | 311 | 21 |
29 | 289 | 304 | e210 | e200 | --- | e270 | 5360 | 916 | 304 | 148 | 233 | 21 |
30 | 255 | 279 | e170 | e800 | --- | e290 | 3950 | 784 | 279 | 126 | 183 | 19 |
31 | 228 | --- | e150 | e3000 | --- | e300 | --- | 688 | --- | 86 | 150 | --- |
TOTAL | 13628 | 5936 | 7493 | 7575 | 24620 | 16350 | 36017 | 100372 | 65383 | 5593 | 13226 | 1295 |
MEAN | 439.6 | 197.9 | 241.7 | 244.4 | 879.3 | 527.4 | 1201 | 3238 | 2179 | 180.4 | 426.6 | 43.17 |
MAX | 2570 | 784 | 600 | 3000 | 2600 | 1400 | 5360 | 22700 | 12100 | 1040 | 3210 | 126 |
MIN | 30 | 93 | 141 | 110 | 340 | 270 | 209 | 688 | 279 | 64 | 23 | 19 |
CFSM | 0.67 | 0.30 | 0.37 | 0.37 | 1.34 | 0.81 | 1.83 | 4.94 | 3.33 | 0.28 | 0.65 | 0.07 |
IN. | 0.77 | 0.34 | 0.43 | 0.43 | 1.40 | 0.93 | 2.05 | 5.70 | 3.71 | 0.32 | 0.75 | 0.07 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 262.0 | 262.0 | 264.7 | 344.1 | 550.0 | 719.0 | 829.4 | 791.3 | 717.4 | 457.5 | 169.1 | 256.4 |
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 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1945 - 2002 | |||
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ANNUAL TOTAL | 217841 | 297488 | ||||
ANNUAL MEAN | 596.8 | 815.0 | 467.5 | |||
HIGHEST ANNUAL MEAN | 1347 | 1993 | ||||
LOWEST ANNUAL MEAN | 23.1 | 1989 | ||||
HIGHEST DAILY MEAN | 10300 | Feb 11 | 22700 | May 13 | 35600 | Mar 5 1985 |
LOWEST DAILY MEAN | 26 | Aug 21 | 19 | Sep 30 | 0.00 | Oct 19 1988 |
ANNUAL SEVEN-DAY MINIMUM | 30 | Aug 15 | 23 | Sep 24 | 0.12 | Oct 16 1988 |
MAXIMUM PEAK FLOW | 24000 | May 13 | 38900 A | Mar 5 1985 | ||
MAXIMUM PEAK STAGE | 25.76 | May 13 | 27.03 B | Jan 3 1965 | ||
INSTANTANEOUS LOW FLOW | 19 | Sep 29 | ||||
ANNUAL RUNOFF (CFSM) | 0.91 | 1.24 | 0.71 | |||
ANNUAL RUNOFF (INCHES) | 12.37 | 16.90 | 9.70 | |||
10 PERCENT EXCEEDS | 1420 | 1650 | 1020 | |||
50 PERCENT EXCEEDS | 243 | 270 | 128 | |||
90 PERCENT EXCEEDS | 42 | 40 | 10 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |