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 and Aug. 25, 2003. | |
REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor. | |
| Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
DAILY MEAN VALUES | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 1.0 | 1.5 | e0.69 | e0.61 | e0.64 | e0.63 | 3.3 | 46 | 3.3 | 1.3 | 29 | 3.0 |
| 2 | 1.6 | 1.6 | e0.70 | e0.58 | e0.63 | e0.62 | 3.0 | 53 | 2.6 | 1.0 | 75 | 3.4 |
| 3 | 1.5 | 1.7 | e0.68 | e0.57 | e0.73 | e0.65 | 2.5 | 31 | 3.6 | 0.85 | 60 | 2.5 |
| 4 | 3.3 | 1.7 | e0.66 | e0.58 | e0.88 | e0.66 | 7.8 | 22 | 4.0 | 0.75 | 95 | 2.0 |
| 5 | 4.0 | 2.0 | e0.64 | e0.62 | e0.70 | e0.67 | 15 | 59 | 3.4 | 1.7 | 41 | 1.5 |
| 6 | 3.2 | 2.2 | e0.62 | e0.64 | e0.60 | e0.66 | 8.0 | 38 | 3.0 | 4.0 | 23 | 1.3 |
| 7 | 2.6 | 2.2 | e0.62 | e0.63 | e0.56 | e0.67 | 6.6 | 23 | 2.7 | 7.2 | 16 | 1.0 |
| 8 | 2.0 | 2.3 | e0.61 | e0.61 | e0.56 | e0.68 | 5.9 | 16 | 3.9 | 7.8 | 11 | 0.79 |
| 9 | 1.8 | 2.4 | e0.62 | e0.59 | e0.56 | e0.61 | 5.2 | 77 | 4.7 | 9.1 | 9.3 | 0.68 |
| 10 | 1.3 | 2.7 | e0.62 | e0.58 | e0.52 | e0.62 | 4.7 | 52 | 4.5 | 6.7 | 7.8 | 0.59 |
| 11 | 1.0 | 2.5 | e0.60 | e0.57 | e0.53 | e1.0 | 4.4 | 48 | 4.5 | 5.7 | 6.3 | 0.41 |
| 12 | 0.91 | 2.4 | e0.58 | e0.58 | e0.53 | e3.0 | 3.7 | 32 | 3.8 | 5.0 | 3.7 | 0.31 |
| 13 | 0.88 | 2.3 | e0.59 | e0.58 | e0.52 | e10 | 3.1 | 23 | 3.2 | 3.9 | 2.5 | 0.22 |
| 14 | 0.73 | 2.8 | e0.58 | e0.56 | e0.50 | e6.4 | 3.0 | 19 | 2.8 | 3.4 | 2.0 | 2.3 |
| 15 | 0.56 | 3.0 | e0.61 | e0.55 | e0.50 | e4.0 | 3.1 | 16 | 2.6 | 23 | 1.8 | 2.6 |
| 16 | 0.42 | 2.7 | e0.60 | e0.54 | e0.50 | e3.4 | 2.8 | 13 | 2.0 | 23 | 1.6 | 1.9 |
| 17 | 0.39 | 2.4 | e0.60 | e0.53 | e0.53 | 2.7 | 2.4 | 8.4 | 1.8 | 13 | 1.2 | 1.4 |
| 18 | 0.62 | 2.1 | e1.3 | e0.53 | e0.53 | 2.4 | 1.8 | 6.1 | 1.8 | 38 | 0.85 | 1.1 |
| 19 | 0.58 | e2.7 | e1.9 | e0.53 | e0.52 | 2.6 | 1.6 | 4.9 | 2.5 | 24 | 0.67 | 0.91 |
| 20 | 0.44 | e3.3 | e1.3 | e0.54 | e0.50 | 5.7 | 1.6 | 4.9 | 2.0 | 13 | 0.51 | 0.62 |
| 21 | 0.42 | e2.0 | e0.90 | e0.54 | e0.51 | 5.9 | 1.6 | 4.2 | 1.7 | 13 | 0.50 | 0.45 |
| 22 | 0.61 | e1.2 | e0.78 | e0.54 | e0.52 | 4.7 | 1.4 | 3.8 | 1.8 | 7.5 | 0.43 | 0.79 |
| 23 | 0.66 | e1.0 | e0.68 | e0.54 | e0.54 | 4.3 | 1.2 | 3.7 | 1.8 | 6.0 | 0.14 | 0.57 |
| 24 | 0.42 | e0.90 | e0.66 | e0.53 | e0.54 | 3.7 | 1.5 | 3.1 | 1.5 | 5.0 | 0.03 | 0.59 |
| 25 | 1.0 | e0.82 | e0.62 | e0.53 | e0.54 | 3.6 | 1.1 | 2.8 | 1.4 | 4.5 | 0.00 | 0.64 |
| 26 | 1.2 | e0.76 | e0.58 | e0.54 | e0.52 | 3.1 | 1.3 | 2.8 | 1.5 | 4.0 | 0.02 | 1.5 |
| 27 | 1.3 | e0.72 | e0.60 | e0.56 | e0.50 | 2.7 | 1.1 | 2.5 | 1.5 | 4.3 | 0.03 | 3.0 |
| 28 | 1.2 | e0.70 | e0.58 | e0.56 | e0.62 | 3.8 | 0.93 | 4.0 | 1.5 | 9.4 | 0.15 | 2.4 |
| 29 | 1.4 | e0.68 | e0.56 | e0.54 | --- | 6.4 | 0.92 | 2.6 | 1.6 | 11 | 0.18 | 1.9 |
| 30 | 1.6 | e0.68 | e0.62 | e0.54 | --- | 4.4 | 3.5 | 2.5 | 1.5 | 7.5 | 0.47 | 1.6 |
| 31 | 1.4 | --- | e0.63 | e0.58 | --- | 3.6 | --- | 4.6 | --- | 5.7 | 0.88 | --- |
| TOTAL | 40.04 | 55.96 | 22.33 | 17.52 | 15.83 | 93.87 | 104.05 | 628.9 | 78.5 | 270.30 | 391.06 | 41.97 |
| MEAN | 1.29 | 1.87 | 0.72 | 0.57 | 0.57 | 3.03 | 3.47 | 20.3 | 2.62 | 8.72 | 12.6 | 1.40 |
| MAX | 4.0 | 3.3 | 1.9 | 0.64 | 0.88 | 10 | 15 | 77 | 4.7 | 38 | 95 | 3.4 |
| MIN | 0.39 | 0.68 | 0.56 | 0.53 | 0.50 | 0.61 | 0.92 | 2.5 | 1.4 | 0.75 | 0.00 | 0.22 |
| CFSM | 0.13 | 0.19 | 0.07 | 0.06 | 0.06 | 0.31 | 0.35 | 2.05 | 0.26 | 0.88 | 1.27 | 0.14 |
| IN. | 0.15 | 0.21 | 0.08 | 0.07 | 0.06 | 0.35 | 0.39 | 2.36 | 0.29 | 1.02 | 1.47 | 0.16 |
| e Estimated |
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2003, BY WATER YEAR (WY) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MEAN | 6.89 | 9.48 | 7.67 | 10.3 | 12.1 | 12.5 | 16.8 | 15.7 | 12.0 | 11.1 | 6.91 | 5.44 |
| 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 | 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 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1988 - 2003 | |||
|---|---|---|---|---|---|---|
| ANNUAL TOTAL | 3203.54 | 1760.33 | ||||
| ANNUAL MEAN | 8.78 | 4.82 | 10.6 | |||
| HIGHEST ANNUAL MEAN | 15.7 | 1993 | ||||
| LOWEST ANNUAL MEAN | 4.82 | 2003 | ||||
| HIGHEST DAILY MEAN | 207 | May 12 | 95 | Aug 4 | 1370 | Jul 18 1996 |
| LOWEST DAILY MEAN | 0.13 | Sep 15 | 0.00 | Aug 25 | 0.00 A | |
| ANNUAL SEVEN-DAY MINIMUM | 0.39 | Sep 13 | 0.08 | Aug 23 | 0.05 | Oct 9 1988 |
| MAXIMUM PEAK FLOW | 129 | Aug 4 | 1750 | Jul 18 1996 | ||
| MAXIMUM PEAK STAGE | 5.64 | Aug 4 | 10.77 | Jul 18 1996 | ||
| ANNUAL RUNOFF (CFSM) | 0.89 | 0.49 | 1.07 | |||
| ANNUAL RUNOFF (INCHES) | 12.04 | 6.61 | 14.49 | |||
| 10 PERCENT EXCEEDS | 22 | 9.2 | 26 | |||
| 50 PERCENT EXCEEDS | 3.5 | 1.5 | 4.9 | |||
| 90 PERCENT EXCEEDS | 0.64 | 0.53 | 0.69 | |||