LOCATION.-- Lat 41°40'18", long 88°26'29" (NAD of 1927), in SE1/4NW1/4 sec.21, T.37 N., R.7 E., Kendall County, Hydrologic Unit 07120007, on right bank 300 ft upstream from bridge on State Highway 47, 2.0 mi north of Yorkville, and at mile 3.3. |
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DRAINAGE AREA.-- 70.2 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1960 to current year. |
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STAGE: Water years 1994-2002. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-91. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 612.34 ft above NGVD of 1929. |
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REMARKS.-- Diversion about 7 miles upstream near Jericho Rd. that crosses the watershed divide during overbank flow. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE -WATER DISCHARGE AND STAGE: Maximum discharge, 5,510 ft3/s, from rating curve extended above 3,900 ft3/s, July 18, 1996, gage height, 13.16 ft, backwater from debris jam; minimum, 0.10 ft3/s, Dec. 7, 1962, result of freeze up. |
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REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharge, which are poor. |
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 19 | 63 | 55 | e23 | 33 | 55 | 58 | 90 | 60 | 37 | 15 | 12 |
2 | 18 | 59 | 52 | e23 | 30 | e50 | 62 | 85 | 57 | 35 | 13 | 11 |
3 | 17 | 54 | 49 | e23 | 29 | e44 | 61 | 80 | 62 | 32 | 12 | 10 |
4 | 17 | 51 | 47 | e24 | 27 | e40 | 58 | 73 | 129 | 30 | 12 | 10 |
5 | 76 | 47 | 44 | e24 | e26 | e44 | 55 | 68 | 319 | 29 | 22 | 9.3 |
6 | 84 | 45 | 41 | e23 | e26 | e50 | 53 | 65 | 489 | 26 | 23 | 8.9 |
7 | 59 | 45 | 38 | e23 | e25 | 57 | 53 | 66 | 340 | 26 | 18 | 8.4 |
8 | 46 | 45 | 35 | e24 | 25 | 81 | 77 | 61 | 187 | 26 | 16 | 8.8 |
9 | 39 | 41 | 33 | e25 | 25 | 169 | 159 | 64 | 153 | 33 | 14 | 8.3 |
10 | 35 | 41 | 31 | e26 | 39 | 211 | 190 | 64 | 141 | 69 | 12 | 7.4 |
11 | 39 | 38 | 30 | e25 | 60 | 159 | 153 | 82 | 135 | 56 | 11 | 7.4 |
12 | 50 | 36 | 30 | 25 | 60 | 133 | 127 | 240 | 122 | 42 | 10 | 7.4 |
13 | 127 | 35 | 44 | 25 | 58 | 117 | 108 | 380 | 117 | 35 | 11 | 7.4 |
14 | 334 | 38 | 60 | 25 | 56 | 104 | 93 | 329 | 110 | 30 | 80 | 7.2 |
15 | 392 | 42 | 56 | 24 | 53 | 92 | 84 | 194 | 98 | 27 | 104 | 7.7 |
16 | 239 | 41 | 51 | 28 | 51 | 83 | 75 | 156 | 86 | 24 | 55 | 7.8 |
17 | 171 | 36 | 50 | 22 | 48 | 76 | 69 | 197 | 80 | 22 | 35 | 7.5 |
18 | 136 | 33 | 51 | 21 | 45 | 72 | 64 | 185 | 89 | 22 | 26 | 8.5 |
19 | 116 | 34 | 68 | 28 | 47 | 67 | 61 | 147 | 76 | 23 | 21 | 9.2 |
20 | 98 | 35 | 66 | 24 | 81 | 65 | 82 | 126 | 69 | 22 | 18 | 13 |
21 | 86 | 32 | 54 | 23 | 128 | 61 | 89 | 113 | 65 | 21 | 15 | 13 |
22 | 75 | 31 | 52 | 24 | 120 | 56 | 92 | 101 | 61 | 18 | 22 | 13 |
23 | 150 | 29 | 52 | 24 | 95 | 55 | 90 | 92 | 57 | 17 | 106 | 14 |
24 | 236 | 34 | 48 | 27 | 81 | 54 | 83 | 88 | 55 | 15 | 83 | 13 |
25 | 284 | 45 | 40 | 26 | 74 | 53 | 82 | 82 | 52 | 15 | 50 | 11 |
26 | 233 | 49 | e37 | 24 | 68 | 51 | 76 | 82 | 50 | 15 | 36 | 11 |
27 | 123 | 46 | e34 | 24 | 62 | 50 | 76 | 76 | 48 | 17 | 28 | 9.0 |
28 | 97 | 43 | e31 | 23 | 64 | 48 | 108 | 75 | 45 | 18 | 22 | 9.8 |
29 | 83 | 41 | e29 | 25 | --- | 53 | 116 | 72 | 41 | 19 | 19 | 8.6 |
30 | 73 | 47 | e26 | 24 | --- | 64 | 101 | 69 | 40 | 20 | 16 | 7.5 |
31 | 70 | --- | e24 | 37 | --- | 61 | --- | 63 | --- | 17 | 14 | --- |
TOTAL | 3622 | 1256 | 1358 | 766 | 1536 | 2375 | 2655 | 3665 | 3433 | 838 | 939 | 287.1 |
MEAN | 116.8 | 41.87 | 43.81 | 24.71 | 54.86 | 76.61 | 88.50 | 118.2 | 114.4 | 27.03 | 30.29 | 9.570 |
MAX | 392 | 63 | 68 | 37 | 128 | 211 | 190 | 380 | 489 | 69 | 106 | 14 |
MIN | 17 | 29 | 24 | 21 | 25 | 40 | 53 | 61 | 40 | 15 | 10 | 7.2 |
CFSM | 1.66 | 0.60 | 0.62 | 0.35 | 0.78 | 1.09 | 1.26 | 1.68 | 1.63 | 0.39 | 0.43 | 0.14 |
IN. | 1.92 | 0.67 | 0.72 | 0.41 | 0.81 | 1.26 | 1.41 | 1.94 | 1.82 | 0.44 | 0.50 | 0.15 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2002, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 31.44 | 42.46 | 46.60 | 44.21 | 63.11 | 86.02 | 89.01 | 76.82 | 64.76 | 46.51 | 28.68 | 31.70 |
MAX | 126 | 175 | 217 | 146 | 202 | 360 | 249 | 221 | 197 | 381 | 172 | 131 |
(WY) | 1973 | 1986 | 1983 | 1993 | 1997 | 1979 | 1979 | 1974 | 1974 | 1996 | 1987 | 1987 |
MIN | 5.42 | 7.44 | 4.16 | 4.25 | 5.46 | 22.9 | 27.2 | 16.7 | 14.3 | 8.43 | 4.21 | 5.23 |
(WY) | 1964 | 1964 | 1964 | 1977 | 1963 | 1964 | 1963 | 1989 | 1977 | 1961 | 1991 | 1976 |
SUMMARY STATISTICS | FOR 2001 CALENDAR YEAR | FOR 2002 WATER YEAR | WATER YEARS 1961 - 2002 | |||
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ANNUAL TOTAL | 21638.8 | 22730.1 | ||||
ANNUAL MEAN | 59.28 | 62.27 | 54.18 | |||
HIGHEST ANNUAL MEAN | 97.8 | 1993 | ||||
LOWEST ANNUAL MEAN | 16.7 | 1977 | ||||
HIGHEST DAILY MEAN | 542 | Feb 11 | 489 | Jun 6 | 3460 | Jul 19 1996 |
LOWEST DAILY MEAN | 3.6 A | Aug 14 | 7.2 | Sep 14 | 1.6 | Aug 2 1991 |
ANNUAL SEVEN-DAY MINIMUM | 4.4 | Aug 9 | 7.5 | Sep 10 | 2.1 | Jul 31 1991 |
MAXIMUM PEAK FLOW | 562 | Jun 6 | 5510 B | Jul 18 1996 | ||
MAXIMUM PEAK STAGE | 7.40 | Jun 6 | 13.16 C | Jul 18 1996 | ||
INSTANTANEOUS LOW FLOW | 4.0 D | Feb 4 | 0.10 D | Dec 7 1962 | ||
ANNUAL RUNOFF (CFSM) | 0.84 | 0.89 | 0.77 | |||
ANNUAL RUNOFF (INCHES) | 11.47 | 12.05 | 10.49 | |||
10 PERCENT EXCEEDS | 121 | 124 | 110 | |||
50 PERCENT EXCEEDS | 39 | 47 | 31 | |||
90 PERCENT EXCEEDS | 7.8 | 14 | 10 |
A - May have been less during period of missing record Aug. 6-13. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |