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 1994-2002. |
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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, rain gage, 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, 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 | 35 | 1910 | 1050 | e350 | 2530 | 697 | 2240 | 1800 | 497 | 234 | 373 | 66 |
2 | 33 | 1600 | 1150 | e330 | 3090 | 624 | 2310 | 1740 | 461 | 208 | 274 | 64 |
3 | 31 | 1340 | 1110 | e300 | 3240 | 1000 | 2210 | 1640 | 426 | 192 | 585 | 65 |
4 | 29 | 1110 | 992 | 284 | 3090 | 1240 | 2050 | 1490 | 401 | 176 | 705 | 67 |
5 | 33 | 944 | 833 | 274 | 2750 | 1310 | 1900 | 1310 | 419 | 160 | 532 | 65 |
6 | 46 | 792 | 700 | 270 | 2330 | 1290 | 1770 | 1100 | 572 | 146 | 356 | 60 |
7 | 120 | 668 | 608 | 263 | 1890 | 1390 | 1600 | 903 | 636 | 135 | 250 | 57 |
8 | 174 | 584 | 545 | 242 | 1450 | 1470 | 1450 | 797 | 583 | 125 | 179 | 54 |
9 | 154 | 525 | 486 | 243 | 1030 | 1680 | 1590 | 772 | 513 | 127 | 141 | 52 |
10 | 125 | 481 | 432 | 262 | 724 | 2090 | 1700 | 973 | 460 | 197 | 117 | 51 |
11 | 109 | 451 | 395 | 254 | 556 | 2110 | 1740 | 1120 | 449 | 256 | 103 | 51 |
12 | 121 | 414 | 369 | 233 | 499 | 2010 | 1700 | 2440 | 517 | 199 | 94 | 54 |
13 | 469 | 381 | 382 | 228 | 457 | 1840 | 1580 | 4050 | 610 | 151 | 87 | 53 |
14 | 1050 | 370 | 483 | 225 | 402 | 1640 | 1400 | 4400 | 705 | 126 | 82 | 49 |
15 | 1660 | 363 | 817 | 219 | 368 | 1410 | 1190 | 4420 | 710 | 110 | 80 | 49 |
16 | 2160 | 354 | 1020 | 208 | 346 | 1160 | 1000 | 4240 | 633 | 99 | 78 | 48 |
17 | 2690 | 338 | 1210 | 201 | 317 | 945 | 840 | 4040 | 537 | 92 | 78 | 47 |
18 | 2960 | 319 | 1540 | 195 | 280 | 764 | 717 | 3780 | 459 | 85 | 76 | 47 |
19 | 2970 | 315 | 1610 | 179 | 378 | 622 | 643 | 3440 | 400 | 80 | 184 | 48 |
20 | 2780 | 311 | 1550 | 188 | 1400 | 540 | 585 | 3030 | 358 | 77 | 418 | 48 |
21 | 2500 | 297 | 1420 | 211 | 1940 | 483 | 556 | 2600 | 326 | 77 | 397 | 48 |
22 | 2520 | 287 | 1220 | 197 | 2120 | 428 | 569 | 2190 | 304 | 82 | 278 | 50 |
23 | 2870 | 276 | 1040 | 188 | 2110 | 389 | 564 | 1810 | 290 | 86 | 201 | 50 |
24 | 3340 | 269 | 894 | 189 | 1950 | 368 | 543 | 1470 | 275 | 146 | 162 | 46 |
25 | 4100 | 269 | 767 | 191 | 1700 | 352 | 557 | 1150 | 260 | 152 | 137 | 42 |
26 | 4270 | 257 | 649 | 190 | 1410 | 343 | 570 | 910 | 428 | 114 | 118 | 39 |
27 | 4100 | 244 | 567 | 190 | 1110 | 344 | 613 | 736 | 537 | 95 | 104 | 37 |
28 | 3740 | 235 | 521 | 193 | 871 | 382 | 1390 | 636 | 440 | 86 | 92 | 37 |
29 | 3280 | 238 | 470 | 198 | --- | 634 | 1760 | 580 | 338 | 89 | 83 | 38 |
30 | 2770 | 552 | 398 | 253 | --- | 1460 | 1840 | 544 | 271 | 182 | 77 | 37 |
31 | 2320 | --- | e380 | 1250 | --- | 1970 | --- | 524 | --- | 421 | 71 | --- |
TOTAL | 53559 | 16494 | 25608 | 8198 | 40338 | 32985 | 39177 | 60635 | 13815 | 4505 | 6512 | 1519 |
MEAN | 1728 | 549.8 | 826.1 | 264.5 | 1441 | 1064 | 1306 | 1956 | 460.5 | 145.3 | 210.1 | 50.63 |
MAX | 4270 | 1910 | 1610 | 1250 | 3240 | 2110 | 2310 | 4420 | 710 | 421 | 705 | 67 |
MIN | 29 | 235 | 369 | 179 | 280 | 343 | 543 | 524 | 260 | 77 | 71 | 37 |
CFSM | 2.52 | 0.80 | 1.20 | 0.39 | 2.10 | 1.55 | 1.90 | 2.85 | 0.67 | 0.21 | 0.31 | 0.07 |
IN. | 2.90 | 0.89 | 1.39 | 0.44 | 2.19 | 1.79 | 2.12 | 3.29 | 0.75 | 0.24 | 0.35 | 0.08 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1945 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 267.8 | 340.5 | 532.5 | 622.7 | 825.1 | 1076 | 1089 | 858.1 | 738.9 | 425.6 | 139.7 | 180.8 |
MAX | 2556 | 1878 | 1794 | 3030 | 2213 | 3462 | 3116 | 1956 | 3496 | 1958 | 595 | 2020 |
(WY) | 1994 | 1986 | 1968 | 1950 | 1950 | 1982 | 1950 | 2002 | 1958 | 1951 | 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 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1945 - 2002 | |||
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ANNUAL TOTAL | 254424 | 303345 | ||||
ANNUAL MEAN | 697.1 | 831.1 | 589.7 | |||
HIGHEST ANNUAL MEAN | 1323 | 1993 | ||||
LOWEST ANNUAL MEAN | 121 | 1964 | ||||
HIGHEST DAILY MEAN | 4270 | Oct 26 | 4420 | May 15 | 10200 | Jun 14 1958 |
LOWEST DAILY MEAN | 29 | A | 29 | Oct 4 | 5.5 | Sep 13 1964 |
ANNUAL SEVEN-DAY MINIMUM | 34 | Sep 29 | 39 | Sep 24 | 6.6 | Sep 8 1964 |
MAXIMUM PEAK FLOW | 4470 | May 14 | 10400 | Jun 13 1958 | ||
MAXIMUM PEAK STAGE | 19.95 | May 14 | 26.31 | Jun 13 1958 | ||
INSTANTANEOUS LOW FLOW | 29 | Oct 3,4 | 5.2 | Sep 13 1964 | ||
ANNUAL RUNOFF (CFSM) | 1.02 | 1.21 | 0.86 | |||
ANNUAL RUNOFF (INCHES) | 13.80 | 16.45 | 11.68 | |||
10 PERCENT EXCEEDS | 2150 | 2140 | 1610 | |||
50 PERCENT EXCEEDS | 352 | 449 | 268 | |||
90 PERCENT EXCEEDS | 46 | 69 | 33 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |