LOCATION.-- Lat 41°43'33", long 88°09'49" (NAD of 1927), in SW1/4SW1/4 sec.36, T.38 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on 87th Street, 3.0 mi south of Naperville, and at mile 2.9. | |
DRAINAGE AREA.-- 9.90 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1987 to current year. | |
STAGE: Water years 1994-2002. | |
SURFACE-WATER QUALITY | |
CHEMICAL: October 1987 to current year. | |
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 647.00 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,750 ft3/s, July 18, 1996, gage height, 10.77 ft; no flow, Oct. 11, 1988. | |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 8.5 | 12 | 12 | 4.1 | 5.0 | 7.8 | 7.6 | 17 | 5.2 | 3.3 | 2.4 | 2.3 |
| 2 | 4.7 | 9.8 | 11 | 3.8 | 5.9 | 8.7 | 14 | 17 | 4.8 | 3.0 | 2.4 | 1.4 |
| 3 | 3.4 | 8.2 | 8.5 | 3.8 | 4.8 | 9.7 | 13 | 13 | 4.8 | 2.4 | 2.0 | 1.2 |
| 4 | 4.9 | 6.8 | 7.1 | 3.8 | 5.1 | e10 | 11 | 8.0 | 32 | 3.0 | 1.9 | 1.2 |
| 5 | 48 | 5.6 | 6.1 | 3.2 | 5.2 | 8.3 | 7.4 | 8.1 | 61 | 2.5 | 5.0 | 0.88 |
| 6 | 35 | 5.1 | 5.2 | 3.1 | 3.8 | 7.9 | 6.1 | 6.8 | 35 | 2.1 | 4.7 | 0.88 |
| 7 | 26 | 5.0 | 4.5 | e2.8 | 3.3 | 15 | 9.5 | 6.3 | 24 | 2.5 | 3.9 | 0.84 |
| 8 | 20 | 4.6 | 4.2 | e2.6 | 3.2 | 48 | 39 | 5.4 | 20 | 2.1 | 3.1 | 0.87 |
| 9 | 17 | 3.7 | 3.9 | 2.4 | 4.5 | 89 | 78 | 7.4 | 16 | 15 | 2.8 | 0.64 |
| 10 | 15 | 3.5 | 3.7 | e2.1 | 15 | 62 | 54 | 5.9 | 17 | 9.5 | 2.4 | 0.84 |
| 11 | 16 | 3.0 | 3.4 | e2.0 | 15 | 37 | 39 | 42 | 24 | 7.3 | 2.2 | 0.61 |
| 12 | 23 | 3.4 | 3.4 | e2.0 | 13 | 27 | 28 | 207 | 16 | 7.1 | 2.3 | 0.48 |
| 13 | 134 | 5.0 | 7.9 | 1.9 | 12 | 22 | 19 | 94 | 11 | 6.2 | 4.7 | 0.35 |
| 14 | 359 | 4.9 | 7.3 | 1.9 | 11 | 18 | 13 | 43 | 11 | 5.5 | 11 | 0.15 |
| 15 | 148 | 4.5 | 6.2 | e2.0 | 9.8 | 17 | 12 | 30 | 13 | 4.9 | 7.5 | 0.13 |
| 16 | 81 | 4.0 | 5.8 | e2.0 | 8.8 | 14 | 9.9 | 35 | 9.7 | 4.3 | 7.6 | 0.66 |
| 17 | 42 | 5.0 | 8.1 | e2.0 | 7.6 | 12 | 9.6 | 38 | 7.0 | 3.4 | 6.6 | 0.42 |
| 18 | 26 | 3.6 | 7.8 | e2.0 | 6.6 | 11 | 8.3 | 30 | 6.1 | 3.8 | 5.5 | 0.58 |
| 19 | 20 | 3.2 | 7.4 | e1.9 | 12 | 9.2 | 7.1 | 27 | 5.1 | 5.7 | 5.6 | 0.44 |
| 20 | 18 | 3.1 | 6.8 | 1.9 | 35 | 8.4 | 28 | 21 | 4.8 | 3.6 | 5.2 | 1.3 |
| 21 | 16 | 2.8 | 6.1 | 1.9 | 29 | 7.2 | 30 | 17 | 4.6 | 3.0 | 4.3 | 1.7 |
| 22 | 15 | 2.6 | 6.0 | 2.1 | 23 | 6.0 | 26 | 14 | 4.2 | 2.5 | 22 | 1.8 |
| 23 | 45 | 3.4 | 6.3 | e2.2 | 19 | 5.7 | 19 | 11 | 4.0 | 2.3 | 31 | 1.8 |
| 24 | 38 | 3.7 | 5.4 | e2.2 | 16 | 5.2 | 20 | 10 | 3.5 | 1.9 | 34 | 1.5 |
| 25 | 40 | 6.2 | 5.7 | e2.2 | 14 | 4.8 | 23 | 9.6 | 3.5 | 1.9 | 18 | 1.6 |
| 26 | 30 | 5.5 | 4.8 | e2.1 | 13 | 4.5 | 17 | 8.8 | 4.3 | 2.1 | 12 | 1.2 |
| 27 | 26 | 4.8 | 4.4 | e2.1 | 11 | 4.2 | 24 | 7.9 | 4.0 | 3.0 | 9.8 | 1.1 |
| 28 | 21 | 4.0 | 4.1 | e2.0 | e9.1 | 4.1 | 41 | 7.2 | 3.6 | 2.3 | 5.7 | 0.94 |
| 29 | 18 | 5.4 | 4.1 | e2.0 | --- | 7.0 | 24 | 6.4 | 3.3 | 3.0 | 4.3 | 1.0 |
| 30 | 16 | 13 | 3.9 | e2.3 | --- | 9.9 | 19 | 5.6 | 3.0 | 3.2 | 3.5 | 1.6 |
| 31 | 14 | --- | 4.0 | 5.1 | --- | 7.7 | --- | 5.3 | --- | 2.8 | 3.0 | --- |
| TOTAL | 1328.5 | 155.4 | 185.1 | 77.5 | 320.7 | 508.3 | 656.5 | 764.7 | 365.5 | 125.2 | 236.4 | 30.41 |
| MEAN | 42.85 | 5.180 | 5.971 | 2.500 | 11.45 | 16.40 | 21.88 | 24.67 | 12.18 | 4.039 | 7.626 | 1.014 |
| MAX | 359 | 13 | 12 | 5.1 | 35 | 89 | 78 | 207 | 61 | 15 | 34 | 2.3 |
| MIN | 3.4 | 2.6 | 3.4 | 1.9 | 3.2 | 4.1 | 6.1 | 5.3 | 3.0 | 1.9 | 1.9 | 0.13 |
| CFSM | 4.33 | 0.52 | 0.60 | 0.25 | 1.16 | 1.66 | 2.21 | 2.49 | 1.23 | 0.41 | 0.77 | 0.10 |
| IN. | 4.99 | 0.58 | 0.70 | 0.29 | 1.21 | 1.91 | 2.47 | 2.87 | 1.37 | 0.47 | 0.89 | 0.11 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2002, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 7.268 | 9.992 | 8.130 | 10.98 | 12.91 | 13.13 | 17.67 | 15.36 | 12.61 | 11.22 | 6.531 | 5.713 |
| MAX | 42.9 | 20.1 | 22.6 | 30.7 | 44.3 | 26.1 | 34.0 | 46.3 | 31.3 | 78.1 | 27.6 | 18.2 |
| (WY) | 2002 | 1993 | 1988 | 1993 | 1997 | 1990 | 1993 | 1990 | 1993 | 1996 | 1998 | 2001 |
| MIN | 0.70 | 0.58 | 0.69 | 2.34 | 3.22 | 2.36 | 4.03 | 1.57 | 0.78 | 0.39 | 0.22 | 0.36 |
| (WY) | 1993 | 2000 | 1990 | 2000 | 1996 | 2000 | 1989 | 1989 | 1988 | 1988 | 1991 | 1988 |
| SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1988 - 2002 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 5160.56 | 4754.21 | ||||
| ANNUAL MEAN | 14.14 | 13.03 | 10.94 | |||
| HIGHEST ANNUAL MEAN | 15.7 | 1993 | ||||
| LOWEST ANNUAL MEAN | 6.40 | 1994 | ||||
| HIGHEST DAILY MEAN | 359 | Oct 14 | 359 | Oct 14 | 1370 | Jul 18 1996 |
| LOWEST DAILY MEAN | 0.31 | Jul 15,16 | 0.13 | Sep 15 | 0.00 | A |
| ANNUAL SEVEN-DAY MINIMUM | 0.35 | Jul 14 | 0.39 | Sep 13 | 0.05 | Oct 9 1988 |
| MAXIMUM PEAK FLOW | 538 | Oct 14 | 1750 | Jul 18 1996 | ||
| MAXIMUM PEAK STAGE | 7.77 | Oct 14 | 10.77 | Jul 18 1996 | ||
| INSTANTANEOUS LOW FLOW | 0.00 | Sep 15 | ||||
| ANNUAL RUNOFF (CFSM) | 1.43 | 1.32 | 1.10 | |||
| ANNUAL RUNOFF (INCHES) | 19.39 | 17.86 | 15.01 | |||
| 10 PERCENT EXCEEDS | 31 | 28 | 27 | |||
| 50 PERCENT EXCEEDS | 6.8 | 5.8 | 5.3 | |||
| 90 PERCENT EXCEEDS | 1.6 | 1.9 | 0.80 | |||