LOCATION.-- Lat 41°55'52", long 88°45'34" (NAD of 1927), in SW1/4NE1/4 sec.22, T.40 N., R.4 E., De Kalb County, Hydrologic Unit 07090006, on left bank 100 ft downstream from bridge on State Highway 38 in De Kalb, and at mile 48.5. |
|
DRAINAGE AREA.-- 77.7 mi2. |
|
PERIOD OF RECORD.-- |
|
SURFACE-WATER DISCHARGE AND STAGE |
|
DISCHARGE: July 1925 to October 1933, October 1979 to current year. |
|
STAGE: Water years 1995-2002. |
|
SURFACE-WATER QUALITY |
|
SEDIMENT: October 1979 to September 1981. |
|
REVISED RECORDS.-- WDR IL-80-1: Drainage area. |
|
GAGE.-- Water-stage recorder, phone telemeter, and crest stage gage. Datum of gage is 831.88 ft above NGVD of 1929. Mar. 23, 1980, to Sept. 30, 1983, at datum 3.0 ft higher. Oct. 1, 1979, to Mar. 22, 1980, nonrecording gage at same site at datum 3.0 ft higher. Prior to Sept. 30, 1933, nonrecording gage at same site at datum 3.40 ft higher. |
|
EXTREMES FOR PERIOD OF RECORD.-- |
|
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,500 ft3/s, July 2, 1983, gage height, 15.80 ft; present datum; no flow, several days. |
|
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,650 mg/L June 13, 1981; minimum daily mean, 10 mg/L Mar. 9, 1980. |
|
SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,070 tons June 13, 1981; minimum daily, 0.04 ton Oct. 15, 1979. |
|
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 | 2.8 | 26 | 30 | e13 | 12 | 50 | 47 | 87 | 83 | 26 | 3.3 | 1.5 |
2 | 2.6 | 22 | 26 | e12 | 10 | e47 | 51 | 122 | 80 | 25 | 0.45 | 1.6 |
3 | 2.2 | 21 | 27 | e13 | e9.6 | 44 | 45 | 104 | 84 | 20 | 0.17 | 1.1 |
4 | 5.0 | 20 | 26 | 14 | e9.0 | 52 | 40 | 92 | 683 | 19 | 20 | 1.0 |
5 | 10 | 18 | 26 | 15 | e8.4 | 58 | 41 | 87 | 1040 | 18 | 17 | 1.7 |
6 | 3.9 | 17 | 25 | 15 | 8.1 | 47 | 41 | 85 | 732 | 18 | 6.9 | 0.89 |
7 | 3.4 | 16 | 23 | 14 | 8.9 | 46 | 61 | 78 | 434 | 15 | 2.4 | 0.58 |
8 | 3.4 | 15 | 22 | 13 | 10 | 166 | 167 | 76 | 309 | 13 | 0.85 | 0.54 |
9 | 3.7 | 15 | 20 | 15 | 11 | 311 | 341 | 81 | 236 | 12 | 0.47 | 0.41 |
10 | 5.1 | 14 | 19 | 14 | 25 | 214 | 237 | 63 | 192 | 11 | 0.33 | 0.58 |
11 | 4.3 | 13 | 18 | 12 | 37 | 157 | 179 | 146 | 181 | 11 | 0.32 | 0.81 |
12 | 12 | 11 | 20 | 12 | 38 | 134 | 148 | 608 | 153 | 8.9 | 1.1 | 0.54 |
13 | 38 | 12 | 37 | 13 | 36 | 117 | 125 | 535 | 135 | 7.6 | 35 | 0.39 |
14 | 37 | 16 | 38 | 12 | 37 | 104 | 114 | 360 | 123 | 6.3 | 25 | 0.56 |
15 | 23 | 14 | 33 | 11 | 38 | 96 | 103 | 274 | 109 | 5.3 | 13 | 0.28 |
16 | 16 | 14 | 30 | 9.0 | 41 | 78 | 92 | 267 | 98 | 4.1 | 8.4 | 0.05 |
17 | 12 | 11 | 32 | e8.6 | 38 | 76 | 82 | 293 | 91 | 2.7 | 4.4 | 0.03 |
18 | 11 | 11 | 30 | e8.2 | 35 | 71 | 77 | 227 | 81 | 2.5 | 2.2 | 1.7 |
19 | 8.1 | 11 | 30 | 8.1 | 55 | 65 | 76 | 190 | 73 | 2.9 | 1.1 | 4.8 |
20 | 7.3 | 11 | 27 | 8.8 | 151 | 64 | 70 | 164 | 66 | 2.4 | 0.49 | 4.3 |
21 | 8.2 | 10 | 24 | 9.6 | 163 | 59 | 78 | 147 | 59 | 1.8 | 0.91 | 1.8 |
22 | 19 | 9.5 | 26 | 9.5 | 129 | 54 | 72 | 136 | 56 | 1.2 | 93 | 2.4 |
23 | 169 | 10 | 29 | 11 | 109 | e51 | 65 | 132 | 53 | 0.80 | 41 | 1.1 |
24 | 147 | 32 | 25 | 11 | 96 | e49 | 70 | 118 | 49 | 0.86 | 27 | 0.72 |
25 | 132 | 50 | 29 | 10 | 83 | 47 | 62 | 121 | 46 | 0.62 | 14 | 0.55 |
26 | 92 | 40 | 22 | 9.6 | 72 | 47 | 54 | 104 | 46 | 0.59 | 6.9 | 0.50 |
27 | 62 | 37 | 23 | 9.2 | 64 | 47 | 66 | 100 | 41 | 2.5 | 5.2 | 0.41 |
28 | 46 | 30 | 22 | 9.1 | 57 | 47 | 98 | 96 | 35 | 1.7 | 3.7 | 0.36 |
29 | 36 | 30 | 19 | 8.8 | --- | 60 | 89 | 94 | 32 | 2.2 | 2.7 | 0.38 |
30 | 32 | 33 | 16 | 8.8 | --- | 53 | 81 | 92 | 30 | 1.5 | 1.9 | 0.35 |
31 | 29 | --- | e14 | 9.5 | --- | 46 | --- | 90 | --- | 2.5 | 1.5 | --- |
TOTAL | 983.0 | 589.5 | 788 | 346.8 | 1391.0 | 2557 | 2872 | 5169 | 5430 | 246.97 | 340.69 | 31.93 |
MEAN | 31.71 | 19.65 | 25.42 | 11.19 | 49.68 | 82.48 | 95.73 | 166.7 | 181.0 | 7.967 | 10.99 | 1.064 |
MAX | 169 | 50 | 38 | 15 | 163 | 311 | 341 | 608 | 1040 | 26 | 93 | 4.8 |
MIN | 2.2 | 9.5 | 14 | 8.1 | 8.1 | 44 | 40 | 63 | 30 | 0.59 | 0.17 | 0.03 |
CFSM | 0.41 | 0.25 | 0.33 | 0.14 | 0.64 | 1.06 | 1.23 | 2.15 | 2.33 | 0.10 | 0.14 | 0.01 |
IN. | 0.47 | 0.28 | 0.38 | 0.17 | 0.67 | 1.22 | 1.38 | 2.47 | 2.60 | 0.12 | 0.16 | 0.02 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2002, BY WATER YEAR (WY) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MEAN | 24.30 | 57.30 | 56.96 | 42.76 | 80.40 | 101.2 | 108.0 | 94.79 | 93.91 | 57.37 | 35.45 | 28.84 |
MAX | 119 | 246 | 261 | 154 | 245 | 292 | 309 | 221 | 257 | 322 | 383 | 337 |
(WY) | 1927 | 1986 | 1983 | 1993 | 2001 | 1993 | 1993 | 1995 | 1993 | 1983 | 1987 | 1980 |
MIN | 0.22 | 1.43 | 0.93 | 4.10 | 6.14 | 12.3 | 18.6 | 11.4 | 9.97 | 1.52 | 0.51 | 0.33 |
(WY) | 1934 | 1998 | 1998 | 2000 | 1931 | 1996 | 1996 | 1931 | 1930 | 1988 | 1931 | 1988 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1926 - 2002 | |||
---|---|---|---|---|---|---|
ANNUAL TOTAL | 19876.67 | 20745.89 | ||||
ANNUAL MEAN | 54.46 | 56.84 | 64.98 | |||
HIGHEST ANNUAL MEAN | 151 | 1993 | ||||
LOWEST ANNUAL MEAN | 13.4 | 1931 | ||||
HIGHEST DAILY MEAN | 992 | Feb 25 | 1040 | Jun 5 | 2520 | Jul 3 1983 |
LOWEST DAILY MEAN | 0.27 | Sep 2 | 0.03 | Sep 17 | 0.00 | A |
ANNUAL SEVEN-DAY MINIMUM | 0.35 | Aug 27 | 0.38 | Sep 11 | 0.03 | Sep 30 1931 |
MAXIMUM PEAK FLOW | 1090 | Jun 5 | 3500 | Jul 2 1983 | ||
MAXIMUM PEAK STAGE | 9.86 | Jun 5 | 15.80 B | Jul 2 1983 | ||
INSTANTANEOUS LOW FLOW | 0.00 | Sep 16 | ||||
ANNUAL RUNOFF (CFSM) | 0.70 | 0.73 | 0.84 | |||
ANNUAL RUNOFF (INCHES) | 9.52 | 9.93 | 11.36 | |||
10 PERCENT EXCEEDS | 138 | 133 | 160 | |||
50 PERCENT EXCEEDS | 26 | 25 | 28 | |||
90 PERCENT EXCEEDS | 0.93 | 1.2 | 1.9 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |