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 to current year. | |
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; minimum daily, no flow, Oct. 11, 1988, Aug. 25, 2003 and Sept. 24, 26-28, 2004. | |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 1.3 | 0.38 | 7.3 | e3.4 | e1.6 | 9.8 | 29 | 3.9 | 51 | 3.2 | 2.5 | 11 |
| 2 | 0.99 | 1.9 | 6.6 | e3.2 | e1.6 | 11 | 21 | 3.3 | 32 | 3.0 | 2.3 | 6.8 |
| 3 | 1.4 | 27 | 6.3 | e3.1 | e1.6 | 9.6 | 16 | 4.3 | 20 | 3.5 | 2.3 | 5.3 |
| 4 | 1.6 | 28 | 6.1 | e3.3 | e1.6 | 13 | 12 | 2.9 | 14 | 5.2 | 14 | 4.2 |
| 5 | 0.92 | 100 | 9.5 | e3.2 | e1.6 | 72 | 10 | 2.7 | 11 | 5.0 | 11 | 3.2 |
| 6 | 0.54 | 55 | 9.4 | e3.0 | e1.7 | 44 | 8.5 | 2.2 | 6.9 | 7.9 | 8.5 | 2.6 |
| 7 | 0.38 | 26 | 7.9 | e2.7 | e1.7 | 32 | 5.8 | 2.5 | 5.8 | 16 | 7.1 | 2.2 |
| 8 | 0.70 | 17 | 7.3 | e2.5 | e1.6 | 25 | 4.7 | 2.3 | 4.7 | 10 | 6.0 | 1.9 |
| 9 | 0.59 | 13 | 7.8 | e2.3 | e1.5 | 21 | 3.8 | 2.2 | 3.8 | 9.4 | 5.3 | 1.4 |
| 10 | 0.43 | 11 | 65 | e2.4 | e1.5 | 21 | 3.3 | 2.2 | 7.9 | 11 | 4.2 | 1.1 |
| 11 | 0.34 | 9.6 | 43 | e2.5 | e1.4 | 17 | 3.0 | 2.3 | 38 | 9.5 | 3.5 | 1.0 |
| 12 | 0.33 | 8.0 | 29 | e2.6 | e1.6 | 13 | 2.8 | 2.0 | 137 | 10 | 2.9 | 0.66 |
| 13 | 0.47 | 7.3 | 22 | e2.6 | e1.6 | 11 | 2.6 | 3.0 | 102 | 6.6 | 2.5 | 0.35 |
| 14 | 2.3 | 7.6 | 18 | e2.4 | e1.6 | 12 | 6.7 | 11 | 50 | 5.6 | 2.2 | 0.78 |
| 15 | 2.6 | 5.8 | 17 | e2.4 | e1.5 | 10 | 3.1 | 11 | 27 | 4.4 | 1.8 | 0.26 |
| 16 | 2.1 | 5.1 | 16 | e2.5 | e1.5 | 9.5 | 2.3 | 8.0 | 19 | 3.4 | 1.8 | 0.97 |
| 17 | 1.9 | 4.5 | 14 | e2.6 | e1.6 | 8.5 | 2.0 | 7.3 | 16 | 3.2 | 1.8 | 0.98 |
| 18 | 1.8 | 54 | 12 | e2.6 | e1.7 | 8.8 | 1.8 | 8.7 | 14 | 2.7 | 2.0 | 0.72 |
| 19 | 1.6 | 50 | 9.9 | e2.5 | e3.0 | 9.2 | 1.8 | 6.5 | 12 | 5.0 | 2.9 | 0.45 |
| 20 | 1.4 | 32 | 9.5 | e2.3 | 21 | 8.9 | 2.4 | 5.2 | 8.0 | 3.2 | 2.5 | 0.23 |
| 21 | 1.1 | 22 | 7.4 | e2.2 | 21 | 8.5 | 4.9 | 5.2 | 7.8 | 5.1 | 2.1 | 0.07 |
| 22 | 0.64 | 16 | 6.9 | e2.0 | 14 | 8.4 | 3.8 | 15 | 8.5 | 7.8 | 1.8 | 0.07 |
| 23 | 0.61 | 18 | 6.4 | e1.9 | 17 | 8.3 | 3.1 | 12 | 6.9 | 5.5 | 1.7 | 0.04 |
| 24 | 0.70 | 25 | 5.9 | e1.8 | 16 | 10 | 3.0 | 13 | 6.0 | 4.0 | 3.7 | 0.00 |
| 25 | 2.1 | 17 | 5.8 | e1.8 | 12 | 11 | 6.7 | 14 | 5.3 | 3.4 | 8.8 | 0.05 |
| 26 | 1.5 | 14 | 5.2 | e1.7 | 11 | 24 | 5.7 | 10 | 4.4 | 2.9 | 11 | 0.00 |
| 27 | 1.6 | 13 | 4.8 | e1.7 | 9.8 | 25 | 4.8 | 8.9 | 3.8 | 3.0 | 18 | 0.00 |
| 28 | 1.8 | 11 | e10 | e1.7 | 9.1 | 39 | 3.8 | 4.3 | 3.6 | 2.5 | 70 | 0.00 |
| 29 | 1.2 | 9.5 | e8.0 | e1.7 | 8.5 | 113 | 3.5 | 3.1 | 3.5 | 2.6 | 64 | 0.09 |
| 30 | 0.88 | 8.4 | e4.5 | e1.6 | --- | 56 | 3.5 | 23 | 3.3 | 2.9 | 29 | 0.38 |
| 31 | 0.63 | --- | e3.5 | e1.6 | --- | 42 | --- | 47 | --- | 2.9 | 15 | --- |
| TOTAL | 36.45 | 617.08 | 392.0 | 73.8 | 170.9 | 711.5 | 185.4 | 249.0 | 633.2 | 170.4 | 312.2 | 46.80 |
| MEAN | 1.18 | 20.6 | 12.6 | 2.38 | 5.89 | 23.0 | 6.18 | 8.03 | 21.1 | 5.50 | 10.1 | 1.56 |
| MAX | 2.6 | 100 | 65 | 3.4 | 21 | 113 | 29 | 47 | 137 | 16 | 70 | 11 |
| MIN | 0.33 | 0.38 | 3.5 | 1.6 | 1.4 | 8.3 | 1.8 | 2.0 | 3.3 | 2.5 | 1.7 | 0.00 |
| CFSM | 0.12 | 2.08 | 1.28 | 0.24 | 0.60 | 2.32 | 0.62 | 0.81 | 2.13 | 0.56 | 1.02 | 0.16 |
| IN. | 0.14 | 2.32 | 1.47 | 0.28 | 0.64 | 2.67 | 0.70 | 0.94 | 2.38 | 0.64 | 1.17 | 0.18 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2004, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 6.56 | 10.1 | 7.96 | 9.87 | 11.8 | 13.1 | 16.2 | 15.2 | 12.5 | 10.7 | 7.10 | 5.21 |
| MAX | 42.9 | 20.6 | 22.6 | 30.7 | 44.3 | 26.1 | 34.0 | 46.3 | 31.3 | 78.1 | 27.6 | 18.2 |
| (WY) | 2002 | 2004 | 1988 | 1993 | 1997 | 1990 | 1993 | 1990 | 1993 | 1996 | 1998 | 2001 |
| MIN | 0.70 | 0.58 | 0.69 | 0.57 | 0.57 | 2.36 | 3.47 | 1.57 | 0.78 | 0.39 | 0.22 | 0.36 |
| (WY) | 1993 | 2000 | 1990 | 2003 | 2003 | 2000 | 2003 | 1989 | 1988 | 1988 | 1991 | 1988 |
| SUMMARY STATISTICS | FOR 2003 CALENDAR YEAR | FOR 2004 WATER YEAR | WATER YEARS 1988 - 2004 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 2687.53 | 3598.73 | ||||
| ANNUAL MEAN | 7.36 | 9.83 | 10.5 | |||
| HIGHEST ANNUAL MEAN | 15.7 | 1993 | ||||
| LOWEST ANNUAL MEAN | 4.82 | 2003 | ||||
| HIGHEST DAILY MEAN | 100 | Nov 5 | 137 | Jun 12 | 1370 | Jul 18 1996 |
| LOWEST DAILY MEAN | 0.00 | Aug 25 | 0.00 | A | 0.00 | B |
| ANNUAL SEVEN-DAY MINIMUM | 0.08 | Aug 23 | 0.02 | Sep 22 | 0.02 | Sep 22 2004 |
| MAXIMUM PEAK FLOW | 164 | Jun 12 | 1750 | Jul 18 1996 | ||
| MAXIMUM PEAK STAGE | 5.94 | Jun 12 | 10.77 | Jul 18 1996 | ||
| ANNUAL RUNOFF (CFSM) | 0.744 | 0.993 | 1.06 | |||
| ANNUAL RUNOFF (INCHES) | 10.10 | 13.52 | 14.43 | |||
| 10 PERCENT EXCEEDS | 20 | 22 | 26 | |||
| 50 PERCENT EXCEEDS | 2.5 | 4.4 | 4.9 | |||
| 90 PERCENT EXCEEDS | 0.53 | 1.1 | 0.70 | |||