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 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 | 40 | 34 | 78 | 77 | e50 | 125 | 264 | 95 | 1210 | 69 | 45 | 87 |
2 | 35 | 75 | 74 | 73 | e50 | 166 | 207 | 87 | 650 | 63 | 42 | 68 |
3 | 44 | 348 | 70 | 73 | e52 | 148 | 179 | 80 | 366 | 86 | 59 | 61 |
4 | 48 | 324 | 74 | 75 | e53 | 175 | 155 | 75 | 243 | 97 | 214 | 56 |
5 | 45 | 649 | 113 | 79 | e50 | 869 | 141 | 72 | 196 | 77 | 155 | 53 |
6 | 40 | 341 | 133 | 58 | e56 | 970 | 131 | 69 | 165 | 119 | 98 | 49 |
7 | 38 | 178 | 108 | e60 | e54 | 499 | 120 | 74 | 140 | 90 | 72 | 47 |
8 | 37 | 125 | 98 | e59 | e54 | 303 | 112 | 70 | 126 | 71 | 59 | 47 |
9 | 33 | 99 | 104 | e56 | e54 | 228 | 99 | 67 | 112 | 100 | 54 | 42 |
10 | 35 | 87 | 687 | e58 | e52 | 193 | 94 | 65 | 223 | 174 | 49 | 45 |
11 | 35 | 79 | 810 | e62 | e50 | 170 | 92 | 90 | 448 | 120 | 47 | 41 |
12 | 33 | 72 | 388 | 63 | e52 | 148 | 87 | 97 | 1220 | 110 | 46 | 40 |
13 | 35 | 64 | 223 | 61 | e50 | 135 | 83 | 150 | 954 | 85 | 46 | 42 |
14 | 122 | 55 | 176 | 60 | e51 | 150 | 82 | 436 | 456 | 73 | 42 | 41 |
15 | 144 | 54 | 150 | e58 | e48 | 144 | 78 | 528 | 302 | 63 | 40 | 41 |
16 | 90 | 54 | 132 | 57 | e49 | 134 | 74 | 258 | 217 | 61 | 40 | 55 |
17 | 74 | 57 | 119 | e56 | e50 | 135 | 71 | 178 | 184 | 56 | 57 | 52 |
18 | 56 | 514 | 108 | e54 | e50 | 144 | 67 | 199 | 160 | 55 | 77 | 42 |
19 | 45 | 620 | 99 | 53 | e70 | 152 | 68 | 183 | 134 | 53 | 67 | 38 |
20 | 41 | 302 | 95 | e52 | e120 | 170 | 88 | 141 | 117 | 53 | 70 | 39 |
21 | 38 | 187 | 94 | e50 | e180 | 151 | 161 | 208 | 143 | 67 | 54 | 41 |
22 | 35 | 141 | 80 | e49 | 164 | 138 | 126 | 481 | 211 | 59 | 48 | 40 |
23 | 35 | 149 | 80 | e49 | 174 | 128 | 106 | 712 | 149 | 73 | 46 | 41 |
24 | 36 | 234 | 77 | e49 | 194 | 173 | 98 | 366 | 127 | 58 | 90 | 40 |
25 | 84 | 176 | 83 | e50 | 166 | 237 | 168 | 242 | 118 | 51 | 97 | 38 |
26 | 59 | 138 | 81 | e51 | 149 | 398 | 137 | 197 | 102 | 51 | 132 | 37 |
27 | 45 | 116 | 77 | e52 | 130 | 375 | 107 | 160 | 91 | 49 | 141 | 40 |
28 | 45 | 100 | 96 | e51 | 116 | 429 | 95 | 137 | 85 | 48 | 535 | 40 |
29 | 39 | 88 | 112 | e51 | 112 | 1070 | 86 | 117 | 80 | 48 | 283 | 38 |
30 | 38 | 82 | 97 | e50 | --- | 776 | 88 | 475 | 74 | 51 | 156 | 38 |
31 | 37 | --- | 85 | e49 | --- | 383 | --- | 1240 | --- | 48 | 112 | --- |
TOTAL | 1561 | 5542 | 4801 | 1795 | 2500 | 9416 | 3464 | 7349 | 8803 | 2278 | 3073 | 1379 |
MEAN | 50.4 | 185 | 155 | 57.9 | 86.2 | 304 | 115 | 237 | 293 | 73.5 | 99.1 | 46.0 |
MAX | 144 | 649 | 810 | 79 | 194 | 1070 | 264 | 1240 | 1220 | 174 | 535 | 87 |
MIN | 33 | 34 | 70 | 49 | 48 | 125 | 67 | 65 | 74 | 48 | 40 | 37 |
CFSM | 0.41 | 1.50 | 1.26 | 0.47 | 0.70 | 2.47 | 0.94 | 1.93 | 2.39 | 0.60 | 0.81 | 0.37 |
IN. | 0.47 | 1.68 | 1.45 | 0.54 | 0.76 | 2.85 | 1.05 | 2.22 | 2.66 | 0.69 | 0.93 | 0.42 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2004, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 115 | 143 | 109 | 133 | 172 | 186 | 233 | 237 | 181 | 118 | 117 | 103 |
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 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1989 - 2004 | |||
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ANNUAL TOTAL | 42697 | 51961 | ||||
ANNUAL MEAN | 117 | 142 | 154 | |||
HIGHEST ANNUAL MEAN | 202 | 2002 | ||||
LOWEST ANNUAL MEAN | 98.6 | 2003 | ||||
HIGHEST DAILY MEAN | 1440 | May 2 | 1240 | May 31 | 4960 | Jul 18 1996 |
LOWEST DAILY MEAN | 24 | Jul 3 | 33 | Oct 9,12 | 16 | A |
ANNUAL SEVEN-DAY MINIMUM | 26 | Jun 28 | 35 | Oct 7 | 19 | Jun 3 1994 |
MAXIMUM PEAK FLOW | 1580 | Jun 12 | 6620 | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 8.78 | Jun 12 | 14.31 | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 29 | Oct 10,11 | 4.0 | Aug 29 2002 | ||
ANNUAL RUNOFF (CFSM) | 0.951 | 1.15 | 1.25 | |||
ANNUAL RUNOFF (INCHES) | 12.91 | 15.72 | 16.98 | |||
10 PERCENT EXCEEDS | 216 | 289 | 314 | |||
50 PERCENT EXCEEDS | 63 | 82 | 89 | |||
90 PERCENT EXCEEDS | 34 | 41 | 39 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |