LOCATION.-- Lat 39°48'23", long 88°28'34" (NAD of 1927), in NE1/4NW1/4 sec.36, T.16 N., R.6 E., Piatt County, Hydrologic Unit 07140201, on left bank at downstream side of bridge, 0.9 mi northwest of Atwood and at mile 9.0. |
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DRAINAGE AREA.-- 149 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1972 to current year. |
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STAGE: Water years 1994 to current year. |
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REVISED RECORDS.-- WDR IL-93-1: 1989(M), 1990-92. WDR IL-94-1: 1989. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 644.58 ft above NGVD of 1929. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 4,030 ft3/s, Mar. 5, 1979, gage height, 14.03 ft; maximum gage height, 15.39 ft, Apr. 12, 1994, discharge, 3,390 ft3/s; no flow for many days in most years. |
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REMARKS FOR CURRENT YEAR.-- Records poor. |
Discharge, cubic feet per second, WATER YEAR OCTOBER 2003 TO SEPTEMBER 2004 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 5.8 | e5.7 | 119 | 353 | e45 | 50 | 1060 | 52 | 85 | 25 | 9.4 | e6.5 |
2 | 5.6 | e5.0 | 95 | 282 | e42 | 50 | 796 | 49 | 72 | 23 | 7.7 | e6.0 |
3 | 5.7 | e5.1 | 89 | 239 | e41 | 36 | 616 | 43 | 60 | 21 | 7.0 | e5.4 |
4 | 5.7 | e5.4 | 89 | 930 | e40 | 99 | 464 | 40 | 55 | 21 | 6.5 | e5.0 |
5 | 4.9 | e6.0 | 86 | 1680 | e38 | 798 | 337 | 43 | 55 | 17 | 6.0 | e4.5 |
6 | 4.5 | e7.2 | 75 | 1040 | e37 | 711 | 268 | 39 | 57 | 16 | 5.4 | e4.2 |
7 | 4.6 | e7.0 | 73 | 621 | e36 | 462 | 230 | 35 | 52 | 53 | 4.7 | e4.0 |
8 | 4.7 | e6.0 | 75 | 383 | e35 | 305 | 199 | 30 | 47 | 54 | 4.5 | e3.8 |
9 | 4.8 | e5.5 | 75 | 268 | e34 | 227 | 166 | 30 | 41 | 32 | 4.4 | e3.6 |
10 | 5.2 | e5.1 | 80 | 198 | e33 | 169 | 145 | 30 | 43 | 492 | e5.7 | e3.4 |
11 | 5.0 | e5.6 | 71 | 174 | e32 | 147 | 133 | 54 | 343 | 963 | e7.0 | e3.2 |
12 | 5.7 | e6.4 | 65 | 178 | e32 | 119 | 121 | 64 | 484 | 621 | e5.5 | e3.1 |
13 | 6.0 | e6.2 | 63 | 151 | e31 | 98 | 113 | 97 | 288 | 341 | e4.3 | e3.0 |
14 | 8.5 | e5.5 | 54 | 139 | e30 | 92 | 102 | 484 | 183 | 561 | e3.6 | e5.1 |
15 | 12 | e4.9 | 51 | 136 | e30 | 82 | 91 | 722 | 135 | 489 | e3.1 | e6.7 |
16 | 11 | e5.0 | 52 | 112 | e30 | 82 | 88 | 508 | 207 | 283 | e2.8 | e10 |
17 | e9.0 | 8.8 | 40 | 118 | e30 | 78 | 83 | 338 | 442 | 176 | e2.6 | e4.3 |
18 | e7.8 | 110 | 38 | 207 | 35 | 72 | 75 | 252 | 381 | 118 | e3.2 | e2.9 |
19 | e7.2 | 1010 | 35 | 163 | 56 | 60 | 79 | 368 | 229 | 83 | e2.8 | e1.9 |
20 | e7.1 | 790 | 33 | 122 | 101 | 59 | 64 | 362 | 157 | 62 | e3.8 | e1.6 |
21 | e6.8 | 536 | 40 | 106 | 98 | 53 | 72 | 268 | 127 | 47 | e6.2 | e1.6 |
22 | e6.6 | 366 | 42 | 96 | 62 | 46 | 66 | 214 | 109 | 37 | e5.9 | e1.4 |
23 | e6.4 | 281 | 478 | 95 | 54 | 47 | 87 | 185 | 83 | 34 | e4.5 | e1.3 |
24 | e6.0 | 577 | 704 | 102 | 59 | 51 | 78 | 157 | 68 | 26 | e3.5 | e1.6 |
25 | e5.8 | 483 | 451 | 62 | 56 | 54 | 80 | 158 | 57 | 20 | e4.9 | e1.4 |
26 | e6.1 | 336 | 287 | e70 | 51 | 659 | 73 | 153 | 49 | 17 | e5.3 | e1.35 |
27 | e6.6 | 255 | 214 | e64 | 47 | 2020 | 62 | 139 | 43 | 14 | e8.1 | e1.25 |
28 | e6.5 | 200 | 192 | e59 | 42 | 1450 | 56 | 121 | 38 | 12 | e5.8 | e1.2 |
29 | e6.6 | 161 | 631 | e54 | 43 | 1130 | 57 | 99 | 33 | 11 | e18 | e1.3 |
30 | e6.2 | 149 | 771 | e51 | --- | 1300 | 50 | 98 | 28 | 11 | e15 | e1.4 |
31 | e5.8 | --- | 516 | e48 | --- | 1570 | --- | 99 | --- | 11 | e7.8 | --- |
TOTAL | 200.2 | 5354.4 | 5684 | 8301 | 1300 | 12176 | 5911 | 5331 | 4051 | 4691 | 185.0 | 102.00 |
MEAN | 6.46 | 178 | 183 | 268 | 44.8 | 393 | 197 | 172 | 135 | 151 | 5.97 | 3.40 |
MAX | 12 | 1010 | 771 | 1680 | 101 | 2020 | 1060 | 722 | 484 | 963 | 18 | 10 |
MIN | 4.5 | 4.9 | 33 | 48 | 30 | 36 | 50 | 30 | 28 | 11 | 2.6 | 1.2 |
CFSM | 0.04 | 1.20 | 1.23 | 1.80 | 0.30 | 2.64 | 1.32 | 1.15 | 0.91 | 1.02 | 0.04 | 0.02 |
IN. | 0.05 | 1.34 | 1.42 | 2.07 | 0.32 | 3.04 | 1.48 | 1.33 | 1.01 | 1.17 | 0.05 | 0.03 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1973 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 49.6 | 101 | 145 | 127 | 198 | 253 | 235 | 271 | 176 | 87.6 | 54.0 | 23.0 |
MAX | 371 | 592 | 452 | 573 | 595 | 957 | 703 | 843 | 738 | 358 | 394 | 272 |
(WY) | 1994 | 1993 | 1988 | 1993 | 1982 | 1979 | 1994 | 2002 | 1974 | 1973 | 1981 | 1993 |
MIN | 0.00 | 0.66 | 0.46 | 0.16 | 1.53 | 18.0 | 14.9 | 32.4 | 2.65 | 0.00 | 0.00 | 0.00 |
(WY) | 1989 | 2003 | 1977 | 1977 | 2003 | 2003 | 2003 | 2001 | 1988 | 1988 | 1984 | 1988 |
SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1973 - 2004 | |||
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ANNUAL TOTAL | 23974.71 | 53286.60 | ||||
ANNUAL MEAN | 65.7 | 146 | 143 | |||
HIGHEST ANNUAL MEAN | 260 | 1973, 1993 | ||||
LOWEST ANNUAL MEAN | 35.1 | 2003 | ||||
HIGHEST DAILY MEAN | 1010 | Nov 19 | 2020 | Mar 27 | 3810 | May 13 2002 |
LOWEST DAILY MEAN | 0.31 A | Jan 25, 26 | 1.2 B | Sep 28 | 0.00 | C |
ANNUAL SEVEN-DAY MINIMUM | 0.33 A | Jan 21 | 1.3 B | Sep 23 | 0.00 | C |
MAXIMUM PEAK FLOW | 2140 | Mar 27 | 4030 D | Mar 5 1979 | ||
MAXIMUM PEAK STAGE | 13.00 | Mar 27 | 15.39 E | Apr 12 1994 | ||
ANNUAL RUNOFF (CFSM) | 0.441 | 0.977 | 0.960 | |||
ANNUAL RUNOFF (INCHES) | 5.99 | 13.30 | 13.05 | |||
10 PERCENT EXCEEDS | 167 | 454 | 386 | |||
50 PERCENT EXCEEDS | 13 | 52 | 50 | |||
90 PERCENT EXCEEDS | 0.81 | 4.6 | 0.76 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |