LOCATION.-- Lat 40°49'22", long 87°34'53" (NAD of 1927), in NE1/4SE1/4 sec.15, T.27 N., R.11 W., Iroquois County, Hydrologic Unit 07120002, on left bank at upstream side of bridge on U.S. Highway 52 in Iroquois, 500 ft upstream from a railroad bridge, 4.5 mi downstream from Indiana-Illinois State line, and at mile 50.4. |
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DRAINAGE AREA.-- 686 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 1978-91. Additional chemical data for water years 1972-77 are published in Water-Resources Investigations 78-23 and 79-24 as site FL 04. |
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SEDIMENT: October 1978 to September 1980, January 1993 to December 1995. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 614.34 ft above NGVD of 1929. Prior to Aug. 5, 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, 10,400 ft3/s, June 13, 1958, gage height, 26.31 ft; minimum, 5.2 ft3/s, Sept. 13, 1964. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 2,280 mg/L, June 2, 1980; minimum daily, 3 mg/L, Dec. 23, 24, 27-31, 1978. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 12,200 tons, June 3, 1980; minimum daily, 0.45 ton, Dec. 28, 1978. |
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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 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 | 37 | 49 | 52 | 125 | e62 | e145 | 194 | 211 | 383 | 221 | 1550 | 217 |
2 | 37 | 48 | 52 | 143 | e70 | e145 | 187 | 244 | 331 | 208 | 1260 | 559 |
3 | 35 | 47 | 53 | 127 | e77 | e140 | 181 | 297 | 305 | 190 | 1080 | 681 |
4 | 37 | 48 | 52 | 99 | e100 | 137 | 182 | 296 | 320 | 172 | 1010 | 559 |
5 | 39 | 47 | 48 | 87 | e130 | 147 | 365 | 361 | 336 | 260 | 948 | 401 |
6 | 40 | 48 | 50 | e80 | e190 | 160 | 719 | 637 | 317 | 1180 | 839 | 294 |
7 | 43 | 50 | 49 | e72 | e175 | 174 | 770 | 690 | 295 | 2180 | 694 | 235 |
8 | 43 | 53 | 47 | e76 | e150 | 191 | 841 | 599 | 280 | 3350 | 560 | 201 |
9 | 41 | 52 | 47 | 89 | e135 | 241 | 844 | 912 | 264 | 5160 | 465 | 180 |
10 | 39 | 54 | 46 | 115 | e125 | 332 | 747 | 1540 | 245 | 8180 | 402 | 164 |
11 | 38 | 57 | 45 | 161 | e115 | 306 | 618 | 1870 | 234 | 9590 | 355 | 153 |
12 | 38 | 70 | 46 | 131 | e105 | 267 | 512 | 2010 | 264 | 9830 | 320 | 144 |
13 | 38 | 78 | 47 | 116 | e98 | 242 | 428 | 1950 | 469 | 9510 | 290 | 137 |
14 | 38 | 73 | 48 | e100 | e96 | 237 | 366 | 1750 | 1130 | 8850 | 267 | 135 |
15 | 39 | 66 | 50 | e90 | e95 | 218 | 330 | 1540 | 1330 | 8100 | 247 | 135 |
16 | 40 | 61 | 50 | e80 | e95 | 188 | 309 | 1290 | 1220 | 7510 | 232 | 135 |
17 | 40 | 59 | 50 | e72 | e97 | 177 | 288 | 1060 | 958 | 6660 | 231 | 130 |
18 | 40 | 58 | 52 | e66 | e100 | 187 | 267 | 862 | 688 | 6310 | 233 | 121 |
19 | 42 | 57 | 59 | e62 | e105 | 204 | 248 | 688 | 521 | 6010 | 212 | 114 |
20 | 43 | 57 | 87 | e58 | e115 | 224 | 244 | 572 | 417 | 5340 | 190 | 110 |
21 | 48 | 57 | 113 | e55 | e125 | 254 | 308 | 499 | 349 | 4630 | 176 | 107 |
22 | 50 | 56 | 108 | e52 | e140 | 284 | 378 | 453 | 306 | 4190 | 166 | 109 |
23 | 47 | 56 | 92 | e49 | e160 | 286 | 348 | 415 | 275 | 3980 | 155 | 116 |
24 | 43 | 57 | 77 | e47 | e180 | 259 | 300 | 381 | 248 | 3810 | 145 | 127 |
25 | 41 | 57 | 71 | e45 | e200 | 241 | 274 | 350 | 224 | 3590 | 137 | 137 |
26 | 40 | 57 | 62 | e43 | e165 | 259 | 264 | 322 | 205 | 3320 | 132 | 154 |
27 | 42 | 57 | 69 | e42 | e153 | 294 | 246 | 299 | 189 | 3010 | 127 | 254 |
28 | 46 | 55 | 67 | e43 | e147 | 287 | 227 | 283 | 179 | 2710 | 122 | 467 |
29 | 47 | 53 | 68 | e46 | --- | 264 | 213 | 307 | 192 | 2410 | 122 | 452 |
30 | 46 | 51 | 68 | e51 | --- | 236 | 205 | 320 | 224 | 2110 | 127 | 348 |
31 | 47 | --- | 81 | e55 | --- | 210 | --- | 364 | --- | 1830 | 132 | --- |
TOTAL | 1284 | 1688 | 1906 | 2477 | 3505 | 6936 | 11403 | 23372 | 12698 | 134401 | 12926 | 7076 |
MEAN | 41.4 | 56.3 | 61.5 | 79.9 | 125 | 224 | 380 | 754 | 423 | 4336 | 417 | 236 |
MAX | 50 | 78 | 113 | 161 | 200 | 332 | 844 | 2010 | 1330 | 9830 | 1550 | 681 |
MIN | 35 | 47 | 45 | 42 | 62 | 137 | 181 | 211 | 179 | 172 | 122 | 107 |
CFSM | 0.06 | 0.08 | 0.09 | 0.12 | 0.18 | 0.33 | 0.55 | 1.10 | 0.62 | 6.32 | 0.61 | 0.34 |
IN. | 0.07 | 0.09 | 0.10 | 0.13 | 0.19 | 0.38 | 0.62 | 1.27 | 0.69 | 7.29 | 0.70 | 0.38 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 264 | 336 | 524 | 613 | 813 | 1062 | 1077 | 856 | 734 | 492 | 144 | 182 |
MAX | 2556 | 1878 | 1794 | 3030 | 2213 | 3462 | 3116 | 1956 | 3496 | 4336 | 595 | 2020 |
(WY) | 1994 | 1986 | 1968 | 1950 | 1950 | 1982 | 1950 | 2002 | 1958 | 2003 | 1990 | 1993 |
MIN | 10.6 | 18.0 | 16.9 | 20.6 | 27.7 | 94.8 | 249 | 141 | 53.7 | 23.4 | 11.4 | 11.7 |
(WY) | 1957 | 1957 | 1964 | 1945 | 1963 | 1957 | 1946 | 1958 | 1988 | 1988 | 1988 | 1964 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1945 - 2003 | |||
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ANNUAL TOTAL | 212562 | 219672 | ||||
ANNUAL MEAN | 582 | 602 | 590 | |||
HIGHEST ANNUAL MEAN | 1323 | 1993 | ||||
LOWEST ANNUAL MEAN | 121 | 1964 | ||||
HIGHEST DAILY MEAN | 4420 | May 15 | 9830 | Jul 12 | 10200 | Jun 14 1958 |
LOWEST DAILY MEAN | 35 | Oct 3 | 35 | Oct 3 | 5.5 | Sep 13 1964 |
ANNUAL SEVEN-DAY MINIMUM | 37 | Sep 27 | 38 | Oct 1 | 6.6 | Sep 8 1964 |
MAXIMUM PEAK FLOW | 9920 | Jul 12 | 10400 | Jun 13 1958 | ||
MAXIMUM PEAK STAGE | 25.74 | Jul 12 | 26.31 | Jun 13 1958 | ||
INSTANTANEOUS LOW FLOW | 34 | Oct 3,4 | 5.2 | Sep 13 1964 | ||
ANNUAL RUNOFF (CFSM) | 0.85 | 0.88 | 0.86 | |||
ANNUAL RUNOFF (INCHES) | 11.53 | 11.91 | 11.68 | |||
10 PERCENT EXCEEDS | 1760 | 1200 | 1610 | |||
50 PERCENT EXCEEDS | 208 | 175 | 264 | |||
90 PERCENT EXCEEDS | 47 | 47 | 34 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |