LOCATION.-- Lat 41°43'13", long 88°07'55" (NAD of 1927), in SW1/4NE1/4 sec.6, T.37 N., R.10 E., Will County, Hydrologic Unit 07120004, on downstream side of bridge on Washington Street, 3.5 mi southeast of Naperville, and at mile 29.3. |
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DRAINAGE AREA.-- 123 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1988 to current year. |
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STAGE: Water years 1994 to current year. |
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PRECIPITATION: May 1989 to current year. |
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GAGE.-- Water-stage recorder, phone telemeter, unheated tipping-bucket rain gage, and crest-stage gage. Datum of gage is 630.00 ft above NGVD of 1929. Water years 1989 to 1995 datum incorrectly published as 625.28 ft above NGVD of 1929. |
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REMARKS.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,620 ft3/s, July 18, 1996, gage height, 14.31 ft; minimum discharge, 4.0 ft3/s, August 29, 2002. |
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PRECIPITATION: Maximum daily total, 5.34 in., August 4, 1998. |
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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 | 22 | 49 | e38 | 39 | e50 | e53 | 82 | 1100 | 99 | 26 | 137 | 84 |
2 | 56 | 49 | e36 | 36 | e52 | e52 | 73 | 1440 | 77 | 25 | 203 | 69 |
3 | 59 | 48 | e37 | 35 | e59 | e59 | 68 | 860 | 90 | 24 | 270 | 48 |
4 | 107 | 47 | 39 | e35 | e62 | e60 | 292 | 464 | 80 | 26 | 224 | 38 |
5 | 178 | 55 | 43 | 37 | e50 | e58 | 574 | 950 | 66 | 96 | 158 | 34 |
6 | 109 | 56 | e46 | 39 | e43 | e58 | 334 | 896 | 62 | 172 | 139 | 32 |
7 | 83 | 51 | e45 | 39 | e42 | e59 | 226 | 452 | 61 | 142 | 173 | 29 |
8 | 68 | 48 | e46 | 37 | e41 | e61 | 197 | 316 | 118 | 125 | 138 | 30 |
9 | 57 | 49 | e48 | 36 | e42 | e62 | 165 | 984 | 194 | 132 | 96 | 33 |
10 | 51 | 52 | e47 | 34 | e42 | e61 | 177 | 1090 | 134 | 116 | 72 | 29 |
11 | 49 | 52 | e44 | e32 | e42 | e70 | 155 | 816 | 98 | 91 | 58 | 29 |
12 | 46 | 54 | e43 | e34 | e40 | 110 | 127 | 506 | 81 | 58 | 51 | 29 |
13 | 44 | 54 | e42 | e36 | e37 | 150 | 105 | 353 | 69 | 41 | 47 | 30 |
14 | 44 | 54 | 38 | e39 | e38 | 102 | 94 | 286 | 58 | 37 | 43 | 104 |
15 | 49 | 58 | 37 | e41 | e38 | 94 | 87 | 334 | 53 | 241 | 41 | 103 |
16 | 48 | 55 | 38 | e41 | e52 | 93 | 79 | 263 | 49 | 199 | 41 | 62 |
17 | 46 | 49 | 38 | e42 | e45 | 96 | 71 | 196 | 43 | 196 | 42 | 47 |
18 | 54 | 48 | 163 | e42 | e42 | 92 | 65 | 161 | 50 | 315 | 41 | 39 |
19 | 53 | 64 | 223 | e43 | e39 | 91 | 61 | 139 | 77 | 160 | 37 | 34 |
20 | 48 | 69 | 126 | e43 | e40 | 127 | 69 | 143 | 65 | 120 | 33 | 32 |
21 | 47 | 63 | 90 | e43 | e40 | 124 | 65 | 118 | 45 | 211 | 35 | 31 |
22 | 49 | 57 | 69 | e42 | e42 | 99 | 64 | 101 | 37 | 159 | 32 | 42 |
23 | 47 | 55 | e50 | e42 | e42 | 86 | 60 | 89 | 35 | 107 | 31 | 41 |
24 | 50 | 52 | e45 | e43 | e41 | 76 | 57 | 80 | 32 | 81 | 30 | 38 |
25 | 72 | 50 | e42 | e43 | e41 | 78 | 57 | 71 | 30 | 63 | 31 | 35 |
26 | 79 | 49 | e40 | e43 | e40 | 88 | 54 | 63 | 29 | 54 | 36 | 72 |
27 | 64 | 48 | e39 | e44 | e41 | 73 | 53 | 62 | 32 | 48 | 35 | 96 |
28 | 60 | e42 | 39 | e44 | e47 | 92 | 57 | 67 | 29 | 80 | 34 | 70 |
29 | 62 | e40 | 38 | e43 | --- | 148 | 57 | 82 | 27 | 70 | 33 | 48 |
30 | 56 | e39 | 39 | e44 | --- | 113 | 182 | 96 | 25 | 53 | 30 | 43 |
31 | 51 | --- | 40 | e48 | --- | 93 | --- | 146 | --- | 50 | 30 | --- |
TOTAL | 1908 | 1556 | 1748 | 1239 | 1230 | 2678 | 3807 | 12724 | 1945 | 3318 | 2401 | 1451 |
MEAN | 61.5 | 51.9 | 56.4 | 40.0 | 43.9 | 86.4 | 127 | 410 | 64.8 | 107 | 77.5 | 48.4 |
MAX | 178 | 69 | 223 | 48 | 62 | 150 | 574 | 1440 | 194 | 315 | 270 | 104 |
MIN | 22 | 39 | 36 | 32 | 37 | 52 | 53 | 62 | 25 | 24 | 30 | 29 |
CFSM | 0.50 | 0.42 | 0.46 | 0.32 | 0.36 | 0.70 | 1.03 | 3.34 | 0.53 | 0.87 | 0.63 | 0.39 |
IN. | 0.58 | 0.47 | 0.53 | 0.37 | 0.37 | 0.81 | 1.15 | 3.85 | 0.59 | 1.00 | 0.73 | 0.44 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 119 | 141 | 106 | 138 | 178 | 179 | 241 | 237 | 174 | 121 | 118 | 106 |
MAX | 534 | 290 | 187 | 315 | 518 | 316 | 449 | 449 | 368 | 456 | 202 | 332 |
(WY) | 2002 | 1996 | 1991 | 1999 | 1997 | 1990 | 1993 | 1990 | 1996 | 1996 | 2002 | 2001 |
MIN | 30.5 | 38.3 | 33.5 | 40.0 | 43.9 | 73.0 | 69.5 | 62.6 | 32.7 | 39.5 | 35.7 | 40.9 |
(WY) | 1990 | 2000 | 1990 | 2003 | 2003 | 2000 | 1989 | 1989 | 1992 | 1991 | 1991 | 1991 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1989 - 2003 | |||
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ANNUAL TOTAL | 55227 | 36005 | ||||
ANNUAL MEAN | 151 | 98.6 | 155 | |||
HIGHEST ANNUAL MEAN | 202 | 2002 | ||||
LOWEST ANNUAL MEAN | 98.6 | 2003 | ||||
HIGHEST DAILY MEAN | 1660 | May 12,13 | 1440 | May 2 | 4960 | Jul 18 1996 |
LOWEST DAILY MEAN | 16 | Sep 28 | 22 | Oct 1 | 16 | A |
ANNUAL SEVEN-DAY MINIMUM | 22 | Sep 25 | 26 | Jun 28 | 19 | Jun 3 1994 |
MAXIMUM PEAK FLOW | 1530 | May 2 | 6620 | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 8.63 | May 2 | 14.31 | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 4.0 | Aug 29 2002 | ||||
ANNUAL RUNOFF (CFSM) | 1.23 | 0.80 | 1.26 | |||
ANNUAL RUNOFF (INCHES) | 16.70 | 10.89 | 17.07 | |||
10 PERCENT EXCEEDS | 305 | 172 | 314 | |||
50 PERCENT EXCEEDS | 75 | 53 | 90 | |||
90 PERCENT EXCEEDS | 39 | 35 | 39 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |