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 1994-2002. |
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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, 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 | 103 | 155 | 235 | e77 | 104 | 115 | 135 | 203 | 85 | 41 | 42 | 52 |
2 | 92 | 135 | 174 | e74 | 101 | 126 | 188 | 250 | 74 | 40 | 35 | 52 |
3 | 83 | 118 | 148 | e72 | 95 | 144 | 161 | 233 | 73 | 37 | 30 | 101 |
4 | 126 | 111 | 131 | e72 | 88 | 133 | 139 | 182 | 626 | 47 | 44 | 72 |
5 | 526 | 103 | 121 | e68 | 84 | 124 | 128 | 165 | 1360 | 34 | 212 | 58 |
6 | 308 | 96 | 114 | e69 | 81 | 120 | 121 | 162 | 1110 | 31 | 109 | 48 |
7 | 192 | 93 | 109 | e68 | 78 | 179 | 162 | 145 | 469 | 30 | 65 | 43 |
8 | 143 | 94 | 101 | e67 | 82 | 472 | 406 | 132 | 305 | 30 | 47 | 40 |
9 | 119 | 90 | 91 | e66 | 101 | 964 | 910 | 193 | 223 | 989 | 37 | 40 |
10 | 109 | 85 | 87 | 67 | 235 | 741 | 651 | 171 | 215 | 499 | 31 | 39 |
11 | 133 | 80 | 84 | 65 | 266 | 411 | 393 | 483 | 233 | 247 | 29 | 39 |
12 | 220 | 77 | 89 | 62 | 206 | 309 | 298 | 1660 | 205 | 156 | 31 | 38 |
13 | 1230 | 75 | 200 | 60 | 171 | 252 | 240 | 1660 | 155 | 111 | 169 | 35 |
14 | 2660 | 103 | 193 | 63 | 148 | 215 | 211 | 792 | 211 | 85 | 653 | 31 |
15 | 2340 | 107 | 151 | 63 | 137 | 186 | 191 | 474 | 178 | 67 | 409 | 30 |
16 | 1540 | 92 | 135 | 61 | 127 | 158 | 179 | 505 | 134 | 57 | 220 | 30 |
17 | 684 | 81 | 152 | e62 | 121 | 145 | 183 | 782 | 112 | 52 | 139 | 30 |
18 | 451 | 78 | 143 | e61 | 112 | 131 | 176 | 480 | 97 | 58 | 101 | 39 |
19 | 345 | 92 | 137 | e58 | 161 | 120 | 179 | 335 | 86 | 50 | 85 | 42 |
20 | 265 | 88 | 140 | e58 | 466 | 114 | 363 | 261 | 76 | 44 | 75 | 103 |
21 | 221 | 81 | 121 | 58 | 538 | 107 | 282 | 212 | 71 | 40 | 56 | 92 |
22 | 192 | 76 | 117 | 60 | 352 | 95 | 303 | 177 | 67 | 40 | 601 | 74 |
23 | 667 | 72 | 142 | 71 | 254 | 91 | 241 | 159 | 61 | 38 | 1180 | 84 |
24 | 1000 | 104 | 133 | 77 | 201 | 88 | 240 | 159 | 55 | 38 | 808 | 42 |
25 | 943 | 201 | 120 | 75 | 169 | 84 | 268 | 169 | 92 | 35 | 336 | 26 |
26 | 611 | 161 | 114 | 72 | 150 | 83 | 208 | 158 | 85 | 38 | 217 | 21 |
27 | 372 | 129 | 100 | 74 | 138 | 82 | 267 | 129 | 65 | 62 | 156 | 19 |
28 | 285 | 109 | 91 | 72 | 125 | 77 | 441 | 119 | 55 | 63 | 125 | 16 |
29 | 236 | 116 | e85 | 69 | --- | 135 | 306 | 113 | 49 | 84 | 94 | 22 |
30 | 198 | 193 | e78 | 74 | --- | 208 | 234 | 104 | 44 | 74 | 76 | 25 |
31 | 175 | --- | e78 | 91 | --- | 148 | --- | 96 | --- | 53 | 58 | --- |
TOTAL | 16569 | 3195 | 3914 | 2106 | 4891 | 6357 | 8204 | 10863 | 6671 | 3270 | 6270 | 1383 |
MEAN | 534.5 | 106.5 | 126.3 | 67.94 | 174.7 | 205.1 | 273.5 | 350.4 | 222.4 | 105.5 | 202.3 | 46.10 |
MAX | 2660 | 201 | 235 | 91 | 538 | 964 | 910 | 1660 | 1360 | 989 | 1180 | 103 |
MIN | 83 | 72 | 78 | 58 | 78 | 77 | 121 | 96 | 44 | 30 | 29 | 16 |
CFSM | 4.35 | 0.87 | 1.03 | 0.55 | 1.42 | 1.67 | 2.22 | 2.85 | 1.81 | 0.86 | 1.64 | 0.37 |
IN. | 5.01 | 0.97 | 1.18 | 0.64 | 1.48 | 1.92 | 2.48 | 3.29 | 2.02 | 0.99 | 1.90 | 0.42 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 123.0 | 146.9 | 109.8 | 144.9 | 187.5 | 185.2 | 249.0 | 224.5 | 181.8 | 122.1 | 121.3 | 110.5 |
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 | 48.4 | 54.8 | 73.0 | 69.5 | 62.6 | 32.7 | 39.5 | 35.7 | 40.9 |
(WY) | 1990 | 2000 | 1990 | 2000 | 1989 | 2000 | 1989 | 1989 | 1992 | 1991 | 1991 | 1991 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1989 - 2002 | |||
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ANNUAL TOTAL | 75396 | 73693 | ||||
ANNUAL MEAN | 206.6 | 201.9 | 158.5 | |||
HIGHEST ANNUAL MEAN | 202 | 2002 | ||||
LOWEST ANNUAL MEAN | 110 | 1989 | ||||
HIGHEST DAILY MEAN | 2660 | Oct 14 | 2660 | Oct 14 | 4960 | Jul 18 1996 |
LOWEST DAILY MEAN | 34 | Jul 14,Aug 6 | 16 | Sep 28 | 16 | A |
ANNUAL SEVEN-DAY MINIMUM | 37 | Jul 11 | 24 | Sep 24 | 19 | Jun 3 1994 |
MAXIMUM PEAK FLOW | 3090 | Oct 13 | 6620 | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 10.70 | Oct 13 | 14.31 | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 4.0 | Aug 29 | 4.0 | Aug 29 2002 | ||
ANNUAL RUNOFF (CFSM) | 1.68 | 1.64 | 1.29 | |||
ANNUAL RUNOFF (INCHES) | 22.80 | 22.29 | 17.51 | |||
10 PERCENT EXCEEDS | 375 | 445 | 323 | |||
50 PERCENT EXCEEDS | 120 | 114 | 92 | |||
90 PERCENT EXCEEDS | 53 | 42 | 40 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |