LOCATION.-- Lat 41°16'19", long 90°22'39" (NAD of 1927), in NE1/4SE1/4 sec.21, T.15 N., R.1 E., Henry County, Hydrologic Unit 07080104, on left bank at downstream side of bridge on U.S. Highway 150, 1.5 mi north of Opheim, 5.5 mi south of Orion, and at mile 51.5. |
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DRAINAGE AREA.-- 155 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1940 to current year. Monthly discharge only for some periods, published in WSP 1308. |
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STAGE: Water years 1994-2002. |
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REVISED RECORDS.-- WSP 1175: 1947(P). WSP 1508: 1942. WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter and crest-stage gage. Datum of gage is 653.96 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark). Prior to Apr. 4, 1941, and Apr. 8 to Nov. 11, 1981, 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, 8,910 ft3/s, Feb. 19, 1951, gage height, 13.41 ft, from floodmarks; maximum gage height, 15.52 ft, June 23, 1974, discharge, 5,760 ft3/s; minimum discharge, 0.3 ft3/s, Oct. 6, 1956. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of August 1924 reached a stage of 20.2 ft, from floodmarks. |
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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 | 7.7 | 27 | 25 | e21 | 52 | e80 | 67 | 249 | 182 | 114 | 27 | 15 |
2 | 7.5 | 24 | 24 | e20 | 45 | e74 | 90 | 220 | 169 | 107 | 26 | 15 |
3 | 7.3 | 24 | 24 | e20 | 33 | e70 | 103 | 188 | 163 | 103 | 25 | 14 |
4 | 8.7 | 22 | 22 | e20 | 32 | e130 | 87 | 172 | 1360 | 95 | 25 | 14 |
5 | 24 | 22 | 22 | e21 | 40 | e115 | 81 | 162 | 1540 | 88 | 78 | 14 |
6 | 16 | 23 | 24 | e22 | 32 | 107 | 76 | 163 | 543 | 156 | 34 | 14 |
7 | 11 | 22 | 24 | e22 | 30 | 99 | 119 | 147 | 406 | 118 | 27 | 13 |
8 | 8.6 | 22 | 23 | e23 | 31 | 385 | 603 | 140 | 335 | 95 | 24 | 13 |
9 | 7.6 | 22 | 22 | e23 | 27 | 387 | 797 | 163 | 289 | 87 | 23 | 13 |
10 | 9.4 | 21 | 22 | e24 | 50 | 218 | 457 | 138 | 258 | 79 | 22 | e12 |
11 | 10 | 21 | 22 | e24 | 56 | 177 | 359 | 850 | 285 | 86 | 22 | e12 |
12 | 10 | 21 | 23 | e23 | 54 | 154 | 297 | 2870 | 278 | 75 | 21 | e12 |
13 | 13 | 20 | 43 | e22 | 55 | 139 | 251 | 921 | 1170 | 68 | 21 | e11 |
14 | 20 | 21 | 40 | e21 | 53 | 126 | 229 | 662 | 572 | 64 | 21 | e11 |
15 | 15 | 20 | 34 | e20 | 62 | 114 | 208 | 482 | 414 | 60 | 20 | e11 |
16 | 13 | 19 | 33 | e20 | 76 | 96 | 185 | 414 | 334 | 56 | 20 | e11 |
17 | 11 | 19 | 32 | e20 | 74 | 95 | 170 | 365 | 288 | 53 | 19 | e12 |
18 | 11 | 18 | 32 | e21 | 67 | 90 | 159 | 318 | 255 | 51 | 18 | 13 |
19 | 11 | 18 | 31 | e22 | 85 | 85 | 148 | 286 | 229 | 52 | 41 | 13 |
20 | 10 | 19 | 29 | e22 | 276 | 83 | 135 | 257 | 210 | 48 | 27 | 13 |
21 | 10 | 19 | 29 | e23 | 281 | 81 | 156 | 235 | 192 | 45 | 20 | 13 |
22 | 12 | 19 | 32 | e23 | 182 | 80 | 150 | 220 | 180 | 42 | 19 | 14 |
23 | 161 | 19 | 38 | e24 | 152 | 82 | 138 | 216 | 168 | 39 | 73 | 14 |
24 | 91 | 26 | e32 | e24 | 132 | 75 | 180 | 209 | 156 | 37 | 43 | 13 |
25 | 73 | 31 | e27 | 25 | 114 | 72 | 223 | 649 | 157 | 35 | 24 | 13 |
26 | 47 | 25 | e26 | 25 | e100 | 70 | 174 | 391 | 157 | 34 | 21 | 13 |
27 | 37 | 30 | e25 | 24 | e93 | 67 | 273 | 308 | 197 | 41 | 19 | 12 |
28 | 33 | 27 | e24 | 24 | e90 | 67 | 487 | 268 | 145 | 37 | 18 | 12 |
29 | 30 | 25 | e23 | 24 | --- | 68 | 322 | 239 | 130 | 34 | 17 | 12 |
30 | 29 | 27 | e22 | 24 | --- | 65 | 276 | 219 | 122 | 32 | 16 | 11 |
31 | 28 | --- | e21 | 47 | --- | 63 | --- | 198 | --- | 29 | 16 | --- |
TOTAL | 782.8 | 673 | 850 | 718 | 2374 | 3614 | 7000 | 12319 | 10884 | 2060 | 827 | 383 |
MEAN | 25.25 | 22.43 | 27.42 | 23.16 | 84.79 | 116.6 | 233.3 | 397.4 | 362.8 | 66.45 | 26.68 | 12.77 |
MAX | 161 | 31 | 43 | 47 | 281 | 387 | 797 | 2870 | 1540 | 156 | 78 | 15 |
MIN | 7.3 | 18 | 21 | 20 | 27 | 63 | 67 | 138 | 122 | 29 | 16 | 11 |
CFSM | 0.16 | 0.14 | 0.18 | 0.15 | 0.55 | 0.75 | 1.51 | 2.56 | 2.34 | 0.43 | 0.17 | 0.08 |
IN. | 0.19 | 0.16 | 0.20 | 0.17 | 0.57 | 0.87 | 1.68 | 2.96 | 2.61 | 0.49 | 0.20 | 0.09 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 53.26 | 64.91 | 70.24 | 87.88 | 156.4 | 177.7 | 203.7 | 179.8 | 172.6 | 106.9 | 54.37 | 47.08 |
MAX | 466 | 486 | 436 | 427 | 871 | 554 | 634 | 558 | 693 | 689 | 466 | 375 |
(WY) | 1942 | 1978 | 1983 | 1974 | 1951 | 1979 | 1983 | 1973 | 1974 | 1969 | 1993 | 1989 |
MIN | 0.93 | 1.87 | 0.84 | 0.50 | 2.44 | 13.8 | 11.3 | 11.3 | 9.95 | 6.91 | 3.48 | 2.13 |
(WY) | 1957 | 1977 | 1977 | 1977 | 1989 | 1956 | 1956 | 1989 | 1977 | 1977 | 1988 | 1956 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1941 - 2002 | |||
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ANNUAL TOTAL | 63940.6 | 42484.8 | ||||
ANNUAL MEAN | 175.2 | 116.4 | 114.2 | |||
HIGHEST ANNUAL MEAN | 334 | 1993 | ||||
LOWEST ANNUAL MEAN | 22.0 | 1977 | ||||
HIGHEST DAILY MEAN | 3650 A | Feb 9 | 2870 | May 12 | 7630 | Feb 19 1951 |
LOWEST DAILY MEAN | 7.3 | Oct 3 | 7.3 | Oct 3 | 0.40 | Oct 6 1956 |
ANNUAL SEVEN-DAY MINIMUM | 7.7 | Sep 27 | 9.9 | Oct 7 | 0.40 | Jan 20 1977 |
MAXIMUM PEAK FLOW | 3880 | May 12 | 8910 B | Feb 19 1951 | ||
MAXIMUM PEAK STAGE | 14.17 | May 12 | 15.52 C | Jun 23 1974 | ||
INSTANTANEOUS LOW FLOW | 7.1 | D | 0.30 | Oct 6 1956 | ||
ANNUAL RUNOFF (CFSM) | 1.13 | 0.75 | 0.74 | |||
ANNUAL RUNOFF (INCHES) | 15.35 | 10.20 | 10.01 | |||
10 PERCENT EXCEEDS | 384 | 276 | 237 | |||
50 PERCENT EXCEEDS | 40 | 37 | 49 | |||
90 PERCENT EXCEEDS | 10 | 13 | 6.0 |
D - Oct. 2-4, 9-10; but may have been less during period when orifice was dry, Sept. 10-17. |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |