LOCATION.-- Lat 37°54'10", long 89°50'10" (NAD of 1927), in SW 1/4 sec.24, T.7 S., R.7 W., third principal meridian, Randolph County, Hydrologic Unit 07140105, on downstream side of left pier of main truss of highway bridge at Chester, 8.1 mi downstream from Kaskaskia River, and at mile 109.9 above Ohio River. |
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DRAINAGE AREA.-- 708,600 mi2, approximately. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1927 to current year in reports of the U.S. Geological Survey. Monthly discharge only for some periods, published in WSP 1311. Since August 1873, results of discharge measurements in reports of the Mississippi River Commission. |
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STAGE: July 1942 to current year in reports of the U.S. Geological Survey. Since May 1891, in reports of the Mississippi River Commission and National Weather Service. |
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SURFACE-WATER QUALITY |
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SEDIMENT: August 1980 to current year. |
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REVISED RECORDS.-- WDR MO-76-1: Drainage area. WDR MO-98-1: Extreme outside period of record. |
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GAGE.-- Water-stage recorder and U.S. Army Corps of Engineers satellite telemeter. Datum of gage is 341.05 ft above NGVD of 1929. Prior to Feb. 1, 1962, nonrecording gage 0.4 mi downstream at present datum. |
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REMARKS.-- Natural flow of stream affected by many reservoirs and navigation dams in upper Mississippi River Basin and by many reservoirs and diversions for irrigation in Missouri River Basin. Sediment record computed from transport curves. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,000,000 ft3/s, August 7, 1993, gage height, 49.74 ft; minimum discharge, 30,000 ft3/s, December 12, 1937. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,380 mg/L, Apr. 13, 1987; minimum daily mean, 13 mg/L, Mar. 18, 1981. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,330,000 tons, Feb. 25, 1997; minimum daily, 3,580 tons, Mar. 18, 1981. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of June 30, 1844, reached a gage height of 39.8 ft, discharge, 1,050,000 ft3/s, computed by the U.S. Army Corps of Engineers. |
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REMARKS FOR CURRENT YEAR.--Records good. |
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 | 134000 | 143000 | 149000 | 95000 | 193000 | 154000 | 177000 | 413000 | 391000 | 235000 | 147000 | 181000 |
2 | 127000 | 137000 | 149000 | 94400 | 270000 | 159000 | 164000 | 418000 | 356000 | 226000 | 143000 | 172000 |
3 | 118000 | 135000 | 149000 | 88900 | 271000 | 164000 | 161000 | 411000 | 338000 | 221000 | 135000 | 163000 |
4 | 106000 | 136000 | 150000 | 86500 | 244000 | 166000 | 164000 | 399000 | 332000 | 218000 | 128000 | 155000 |
5 | 99400 | 137000 | 151000 | 86400 | 210000 | 159000 | 165000 | 387000 | 324000 | 214000 | 127000 | 145000 |
6 | 104000 | 139000 | 148000 | 91500 | 188000 | 142000 | 165000 | 370000 | 313000 | 210000 | 124000 | 134000 |
7 | 103000 | 138000 | 140000 | 93500 | 171000 | 130000 | 166000 | 370000 | 312000 | 206000 | 124000 | 127000 |
8 | 107000 | 133000 | 132000 | 92500 | 159000 | 137000 | 173000 | 417000 | 323000 | 202000 | 123000 | 123000 |
9 | 112000 | 125000 | 128000 | 93700 | 147000 | 157000 | 182000 | 495000 | 332000 | 196000 | 122000 | 121000 |
10 | 115000 | 126000 | 125000 | 102000 | 143000 | 180000 | 199000 | 554000 | 343000 | 192000 | 116000 | 122000 |
11 | 113000 | 128000 | 128000 | 104000 | 144000 | 188000 | 223000 | 592000 | 354000 | 190000 | 117000 | 120000 |
12 | 116000 | 125000 | 135000 | 100000 | 141000 | 199000 | 231000 | 616000 | 378000 | 189000 | 118000 | 119000 |
13 | 132000 | 121000 | 144000 | 103000 | 140000 | 195000 | 226000 | 655000 | 399000 | 192000 | 117000 | 124000 |
14 | 139000 | 118000 | 147000 | 104000 | 139000 | 186000 | 222000 | 678000 | 424000 | 192000 | 123000 | 125000 |
15 | 141000 | 114000 | 155000 | 105000 | 143000 | 183000 | 221000 | 698000 | 445000 | 186000 | 130000 | 125000 |
16 | 139000 | 111000 | 162000 | 101000 | 144000 | 191000 | 211000 | 715000 | 450000 | 178000 | 134000 | 125000 |
17 | 139000 | 110000 | 199000 | 96800 | 139000 | 194000 | 209000 | 732000 | 443000 | 165000 | 134000 | 123000 |
18 | 140000 | 108000 | 223000 | 98100 | 132000 | 190000 | 213000 | 732000 | 428000 | 156000 | 138000 | 126000 |
19 | 147000 | 104000 | 218000 | 93500 | 132000 | 190000 | 215000 | 716000 | 408000 | 155000 | 134000 | 124000 |
20 | 151000 | 104000 | 205000 | 94200 | 134000 | 200000 | 221000 | 693000 | 382000 | 152000 | 137000 | 127000 |
21 | 157000 | 102000 | 190000 | 93100 | 131000 | 196000 | 238000 | 659000 | 351000 | 152000 | 155000 | 130000 |
22 | 153000 | 103000 | 175000 | 89900 | 129000 | 192000 | 277000 | 616000 | 320000 | 159000 | 158000 | 124000 |
23 | 138000 | 99200 | 173000 | 85100 | 142000 | 189000 | 313000 | 570000 | 299000 | 159000 | 156000 | 114000 |
24 | 147000 | 96300 | 169000 | 85000 | 153000 | 181000 | 316000 | 524000 | 280000 | 158000 | 160000 | 112000 |
25 | 168000 | 112000 | 153000 | 91400 | 163000 | 190000 | 322000 | 482000 | 268000 | 157000 | 199000 | 113000 |
26 | 179000 | 123000 | 133000 | 89500 | 170000 | 205000 | 327000 | 453000 | 264000 | 154000 | 217000 | 108000 |
27 | 167000 | 118000 | 129000 | 87000 | 162000 | 198000 | 324000 | 439000 | 256000 | 150000 | 214000 | 102000 |
28 | 154000 | 118000 | 118000 | 87100 | 152000 | 191000 | 329000 | 440000 | 249000 | 146000 | 207000 | 94600 |
29 | 157000 | 121000 | 99400 | 88000 | --- | 192000 | 356000 | 449000 | 242000 | 144000 | 196000 | 89700 |
30 | 150000 | 136000 | 90300 | 94600 | --- | 196000 | 392000 | 442000 | 240000 | 141000 | 189000 | 92800 |
31 | 145000 | --- | 86900 | 110000 | --- | 188000 | --- | 422000 | --- | 147000 | 187000 | --- |
MEAN | 135400 | 120700 | 150100 | 94350 | 163800 | 180100 | 236700 | 534100 | 341500 | 178800 | 148700 | 125400 |
MAX | 179000 | 143000 | 223000 | 110000 | 271000 | 205000 | 392000 | 732000 | 450000 | 235000 | 217000 | 181000 |
MIN | 99400 | 96300 | 86900 | 85000 | 129000 | 130000 | 161000 | 370000 | 240000 | 141000 | 116000 | 89700 |
IN. | 0.22 | 0.19 | 0.24 | 0.15 | 0.24 | 0.29 | 0.37 | 0.87 | 0.54 | 0.29 | 0.24 | 0.20 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1942 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 150600 | 157200 | 140600 | 131200 | 161900 | 251200 | 334500 | 326100 | 288600 | 243400 | 161200 | 146800 |
MAX | 588300 | 380400 | 500100 | 323200 | 331000 | 528400 | 719100 | 630900 | 597200 | 795300 | 769500 | 551000 |
(WY) | 1987 | 1986 | 1983 | 1973 | 1974 | 1973 | 1973 | 1995 | 1947 | 1993 | 1993 | 1993 |
MIN | 59490 | 59320 | 51070 | 47810 | 52860 | 84200 | 129400 | 127200 | 81040 | 69050 | 69580 | 66030 |
(WY) | 1957 | 1957 | 1964 | 1964 | 1964 | 1964 | 2000 | 1989 | 1988 | 1988 | 1988 | 1976 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1942 - 2002 | |||
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ANNUAL MEAN | 235300 | 201000 | 207700 | |||
HIGHEST ANNUAL MEAN | 441700 | 1993 | ||||
LOWEST ANNUAL MEAN | 96770 | 1956 | ||||
HIGHEST DAILY MEAN | 590000 | Jun 11 | 732000 | May 17 | 1000000 | Aug 6 1993 |
LOWEST DAILY MEAN | 70700 | Jan 1 | 85000 | Jan 24 | 37600 | Jan 1 1964 |
ANNUAL SEVEN-DAY MINIMUM | 72600 | Jan 1 | 87600 | Jan 23 | 38500 | Dec 20 1963 |
MAXIMUM PEAK FLOW | 738000 | May 17 | 1000000 | Aug 7 1993 | ||
MAXIMUM PEAK STAGE | 40.95 | May 17 | 49.74 | Aug 7 1993 | ||
INSTANTANEOUS LOW FLOW | 82600 | Jan 24 | 30000 | Dec 12 1937 | ||
ANNUAL RUNOFF (INCHES) | 4.51 | 3.85 | 3.98 | |||
10 PERCENT EXCEEDS | 440000 | 391000 | 401000 | |||
50 PERCENT EXCEEDS | 179000 | 154000 | 167000 | |||
90 PERCENT EXCEEDS | 99400 | 102000 | 78200 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |