LOCATION.-- Lat 41°49'54", long 88°02'51" (NAD of 1927), in SE1/4SW1/4 sec.25, T.39 N., R.10 E., Du Page County, Hydrologic Unit 07120004, on upstream side of bridge on State Highway 56, 2.2 mi northwest of Downers Grove, and at mile 15.0. |
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DRAINAGE AREA.-- 26.6 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1989 to current year. |
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STAGE: Water years 1994 to current year. |
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PARTIAL RECORD: Annual maximum, water years 1961-76. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 660.00 ft above NGVD of 1929. Prior to July 19, 1989, at datum 12.21 ft higher. |
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REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,720 ft3/s, Aug. 26, 1972, gage height, 16.94 ft; minimum discharge, 3.6 ft3/s, Dec. 19, 1989. |
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REMARKS FOR CURRENT YEAR.-- Records good. |
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 | 21 | 23 | 16 | 21 | 23 | 20 | 32 | 472 | 44 | 24 | 74 | 57 |
2 | 41 | 20 | 18 | 21 | 23 | 21 | 28 | 446 | 37 | 23 | 182 | 35 |
3 | 30 | 21 | 19 | 21 | 29 | 20 | 28 | 200 | 43 | 26 | 116 | 28 |
4 | 80 | 20 | 19 | 21 | 38 | 22 | 137 | 128 | 36 | 29 | 114 | 25 |
5 | 52 | 22 | 19 | 21 | 26 | 22 | 211 | 312 | 32 | 54 | 69 | 23 |
6 | 39 | 20 | 19 | 19 | 24 | 22 | 105 | 205 | 32 | 57 | 104 | 22 |
7 | 28 | 21 | 20 | 21 | 23 | 22 | 75 | 114 | 32 | 58 | 141 | 22 |
8 | 23 | 20 | 19 | 21 | 23 | 25 | 65 | 72 | 49 | 61 | 99 | 21 |
9 | 23 | 22 | 19 | 21 | 23 | 24 | 57 | 286 | 66 | 59 | 56 | 21 |
10 | 20 | 25 | 18 | 20 | 23 | 22 | 58 | 285 | 47 | 54 | 40 | 21 |
11 | 21 | 22 | 18 | 20 | 22 | 24 | 48 | 229 | 37 | 39 | 34 | 21 |
12 | 22 | 20 | 18 | 19 | 21 | 42 | 40 | 142 | 33 | 33 | 31 | 21 |
13 | 22 | 19 | 18 | 19 | 21 | 47 | 35 | 89 | 30 | 28 | 31 | 21 |
14 | 22 | 22 | 19 | 18 | 21 | 38 | 31 | 72 | 29 | 26 | 32 | 52 |
15 | 21 | 23 | 19 | 18 | 22 | 35 | 30 | 74 | 27 | 117 | 29 | 36 |
16 | 20 | 21 | 20 | 18 | 20 | 35 | 28 | 60 | 26 | 62 | 26 | 29 |
17 | 20 | 22 | 19 | 18 | 21 | 35 | 26 | 51 | 26 | 76 | 29 | 24 |
18 | 22 | 21 | 86 | 18 | 20 | 31 | 26 | 45 | 35 | 138 | 25 | 21 |
19 | 20 | 25 | 88 | 18 | 20 | 30 | 26 | 42 | 39 | 64 | 25 | 21 |
20 | 21 | 23 | 43 | 18 | 21 | 39 | 28 | 47 | 28 | 58 | 26 | 19 |
21 | 20 | 24 | 32 | 18 | 22 | 36 | 26 | 40 | 28 | 146 | 24 | 18 |
22 | 19 | 25 | 27 | 18 | 22 | 32 | 25 | 37 | 27 | 60 | 23 | 24 |
23 | 19 | 23 | 24 | 18 | 21 | 30 | 24 | 35 | 27 | 43 | 22 | 21 |
24 | 19 | 22 | 23 | 18 | 21 | 30 | 24 | 33 | 25 | 38 | 21 | 21 |
25 | 28 | 21 | 22 | 18 | 20 | 32 | 24 | 31 | 25 | 31 | 22 | 20 |
26 | 25 | 21 | 22 | 18 | 20 | 30 | 23 | 30 | 28 | 27 | 24 | 38 |
27 | 22 | 21 | 22 | 18 | 20 | 28 | 23 | 31 | 26 | 26 | 23 | 37 |
28 | 20 | 21 | 21 | 18 | 20 | 45 | 22 | 44 | 25 | 28 | 22 | 26 |
29 | 22 | 21 | 21 | 18 | --- | 50 | 21 | 41 | 24 | 28 | 25 | 23 |
30 | 26 | 18 | 22 | 19 | --- | 38 | 100 | 53 | 24 | 25 | 22 | 21 |
31 | 30 | --- | 22 | 22 | --- | 33 | --- | 73 | --- | 26 | 23 | --- |
TOTAL | 818 | 649 | 792 | 594 | 630 | 960 | 1426 | 3819 | 987 | 1564 | 1534 | 789 |
MEAN | 26.4 | 21.6 | 25.5 | 19.2 | 22.5 | 31.0 | 47.5 | 123 | 32.9 | 50.5 | 49.5 | 26.3 |
MAX | 80 | 25 | 88 | 22 | 38 | 50 | 211 | 472 | 66 | 146 | 182 | 57 |
MIN | 19 | 18 | 16 | 18 | 20 | 20 | 21 | 30 | 24 | 23 | 21 | 18 |
CFSM | 0.99 | 0.81 | 0.96 | 0.72 | 0.85 | 1.16 | 1.79 | 4.63 | 1.24 | 1.90 | 1.86 | 0.99 |
IN. | 1.14 | 0.91 | 1.11 | 0.83 | 0.88 | 1.34 | 1.99 | 5.34 | 1.38 | 2.19 | 2.15 | 1.10 |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 42.1 | 46.2 | 36.8 | 45.6 | 54.1 | 55.3 | 72.0 | 71.7 | 56.2 | 39.2 | 41.2 | 35.5 |
MAX | 142 | 92.8 | 56.2 | 100 | 138 | 87.8 | 139 | 123 | 97.2 | 96.5 | 63.4 | 83.3 |
(WY) | 2002 | 1991 | 1991 | 1993 | 1997 | 1993 | 1993 | 2003 | 1993 | 1996 | 1998 | 2001 |
MIN | 18.5 | 20.5 | 16.3 | 19.2 | 22.5 | 29.9 | 33.3 | 22.2 | 21.5 | 19.9 | 18.4 | 19.7 |
(WY) | 1990 | 2000 | 1990 | 2003 | 2003 | 1996 | 1990 | 1992 | 1992 | 1991 | 1991 | 1995 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1990 - 2003 | |||
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ANNUAL TOTAL | 16886 | 14562 | ||||
ANNUAL MEAN | 46.3 | 39.9 | 49.6 | |||
HIGHEST ANNUAL MEAN | 64.1 | 1993 | ||||
LOWEST ANNUAL MEAN | 38.5 | 1994 | ||||
HIGHEST DAILY MEAN | 450 | May 12 | 472 | May 1 | 961 | Oct 14 2001 |
LOWEST DAILY MEAN | 16 | Dec 1 | 16 | Dec 1 | 11 | A |
ANNUAL SEVEN-DAY MINIMUM | 18 | Nov 30 | 18 | Jan 14 | 12 | Aug 14 1992 |
MAXIMUM PEAK FLOW | 538 | May 1 | 1040 | Oct 14 2001 | ||
MAXIMUM PEAK STAGE | 13.78 | May 1 | 16.28 | Oct 14 2001 | ||
INSTANTANEOUS LOW FLOW | 8.4 | Feb 16 | 3.6 | Dec 19 1989 | ||
ANNUAL RUNOFF (CFSM) | 1.74 | 1.50 | 1.86 | |||
ANNUAL RUNOFF (INCHES) | 23.62 | 20.36 | 25.33 | |||
10 PERCENT EXCEEDS | 79 | 67 | 91 | |||
50 PERCENT EXCEEDS | 29 | 25 | 32 | |||
90 PERCENT EXCEEDS | 20 | 19 | 19 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |