LOCATION.-- Lat 41°54'10", long 89°41'46" (NAD of 1927), in SW1/4SE1/4 sec.9, T.22 N., R.7 E., Whiteside County, Hydrologic Unit 07090005, on left bank 50 ft upstream from bridge on County Road 2200 N, 2 mi northwest of Penrose, 2.2 mi downstream from Buffalo Creek, 5 mi upstream from Sugar Creek, and at mile 17.5. |
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DRAINAGE AREA.-- 146 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1939 to current year. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1979-91. |
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REVISED RECORDS.-- WSP 925: 1940. WSP 955: 1941. WSP 1175: 1941(P), 1948(P). WSP 1308: 1950(M). WDR IL-72-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 657.85 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Apr. 6, 1940, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,330 ft3/s, June 4, 2002, gage height, 17.42 ft; maximum gage height, 17.75 ft, Jan. 5, 1946; minimum discharge, 1.9 ft3/s, Jan. 3, 1976, result of freezeup. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of June 1938 reached a stage of 19.6 ft, from U.S. Army Corps of Engineers high-water mark. |
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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 |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 62 | 60 | e52 | 43 | e39 | e33 | 46 | 64 | 55 | 41 | 35 | 27 |
2 | 79 | 60 | e52 | 43 | e39 | e33 | 44 | 64 | 52 | 41 | 34 | 26 |
3 | 74 | 61 | e49 | 41 | e38 | e33 | 44 | 55 | 53 | 40 | 35 | 25 |
4 | 95 | 61 | e48 | 45 | e37 | e34 | 46 | 55 | 52 | 40 | 36 | 24 |
5 | 102 | 62 | e47 | 46 | e35 | e34 | 48 | 87 | 49 | 42 | 37 | 24 |
6 | 76 | 63 | e47 | 43 | e34 | e34 | 45 | 88 | 50 | 44 | 36 | 23 |
7 | 70 | 61 | e46 | 43 | e33 | e35 | 46 | 72 | 50 | 42 | 34 | 23 |
8 | 68 | 62 | e44 | 46 | e33 | e36 | 45 | 67 | 52 | 46 | 32 | 23 |
9 | 66 | 64 | e43 | 45 | e34 | 37 | 43 | 80 | 49 | 65 | 31 | 23 |
10 | 65 | 65 | e45 | 37 | e34 | 46 | 43 | 81 | 47 | 69 | 31 | 23 |
11 | 64 | 63 | 51 | e41 | e34 | 41 | 44 | 83 | 45 | 51 | 30 | 23 |
12 | 64 | 60 | 52 | e41 | e34 | 61 | 43 | 75 | 45 | 48 | 30 | 25 |
13 | 63 | 59 | 51 | e41 | e35 | 97 | 42 | 67 | 45 | 44 | 29 | 34 |
14 | 64 | 61 | 50 | e41 | e36 | 75 | 42 | 67 | 44 | 51 | 29 | 37 |
15 | 64 | 59 | 50 | e40 | e36 | 73 | 41 | 92 | 43 | 50 | 29 | 31 |
16 | 64 | 57 | 48 | e39 | e37 | 58 | 40 | 80 | 42 | 46 | 29 | 27 |
17 | 64 | 57 | 48 | e38 | e37 | 54 | 40 | 71 | 41 | 41 | 28 | 25 |
18 | 65 | 58 | 56 | e37 | e36 | 51 | 40 | 66 | 42 | 40 | 28 | 26 |
19 | 64 | 59 | 63 | e36 | e34 | 49 | 42 | 65 | 43 | 38 | 27 | 28 |
20 | 63 | 59 | 56 | e36 | e34 | 49 | 53 | 406 | 43 | 37 | 27 | 25 |
21 | 63 | 58 | 51 | e35 | e35 | 49 | 58 | 129 | 40 | 154 | 28 | 27 |
22 | 62 | 56 | 49 | e36 | e35 | 47 | 49 | 96 | 39 | 55 | 26 | 27 |
23 | 61 | 56 | 41 | e38 | e36 | 44 | 45 | 87 | 39 | 43 | 26 | 24 |
24 | 63 | 56 | 50 | e38 | e37 | 44 | 44 | 79 | 38 | 41 | 26 | 24 |
25 | 69 | 55 | 49 | e38 | e39 | 47 | 42 | 71 | 41 | 40 | 25 | 23 |
26 | 69 | 53 | 45 | e38 | e36 | 46 | 40 | 65 | 58 | 39 | 25 | 24 |
27 | 65 | 52 | 47 | e38 | e34 | 44 | 40 | 63 | 51 | 38 | 25 | 24 |
28 | 63 | 55 | 47 | e39 | e34 | 49 | 39 | 62 | 44 | 38 | 25 | 24 |
29 | 63 | 57 | 46 | e39 | --- | 55 | 39 | 59 | 46 | 38 | 25 | 24 |
30 | 62 | 55 | 48 | e39 | --- | 50 | 52 | 58 | 44 | 38 | 24 | 23 |
31 | 61 | --- | 46 | e39 | --- | 47 | --- | 58 | --- | 36 | 26 | --- |
TOTAL | 2097 | 1764 | 1517 | 1239 | 995 | 1485 | 1325 | 2612 | 1382 | 1476 | 908 | 766 |
MEAN | 67.6 | 58.8 | 48.9 | 40.0 | 35.5 | 47.9 | 44.2 | 84.3 | 46.1 | 47.6 | 29.3 | 25.5 |
MAX | 102 | 65 | 63 | 46 | 39 | 97 | 58 | 406 | 58 | 154 | 37 | 37 |
MIN | 61 | 52 | 41 | 35 | 33 | 33 | 39 | 55 | 38 | 36 | 24 | 23 |
CFSM | 0.46 | 0.40 | 0.34 | 0.27 | 0.24 | 0.33 | 0.30 | 0.58 | 0.32 | 0.33 | 0.20 | 0.17 |
IN. | 0.53 | 0.45 | 0.39 | 0.32 | 0.25 | 0.38 | 0.34 | 0.67 | 0.35 | 0.38 | 0.23 | 0.20 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2003, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 67.0 | 72.3 | 74.2 | 96.7 | 151 | 177 | 127 | 128 | 144 | 93.7 | 74.8 | 66.8 |
MAX | 280 | 314 | 267 | 580 | 556 | 588 | 618 | 607 | 560 | 401 | 422 | 225 |
(WY) | 1982 | 1986 | 1973 | 1969 | 1951 | 1993 | 1973 | 1974 | 1993 | 1951 | 1972 | 1972 |
MIN | 15.6 | 17.6 | 15.4 | 14.6 | 22.3 | 33.6 | 34.7 | 25.7 | 25.8 | 19.2 | 23.0 | 14.7 |
(WY) | 1958 | 1950 | 1959 | 1959 | 1964 | 1956 | 1957 | 1940 | 1957 | 1940 | 1963 | 1957 |
SUMMARY STATISTICS | FOR 2002 CALENDAR YEAR | FOR 2003 WATER YEAR | WATER YEARS 1940 - 2003 | |||
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ANNUAL TOTAL | 45393 | 17566 | ||||
ANNUAL MEAN | 124 | 48.1 | 106 | |||
HIGHEST ANNUAL MEAN | 275 | 1973 | ||||
LOWEST ANNUAL MEAN | 30.7 | 1940 | ||||
HIGHEST DAILY MEAN | 4460 A | Jun 4 | 406 | May 20 | 5430 | Apr 21 1973 |
LOWEST DAILY MEAN | 41 | Dec 23 | 23 | B | 10 | Dec 10 1958 |
ANNUAL SEVEN-DAY MINIMUM | 46 | Dec 4 | 23 | Sep 5 | 10 | Dec 9 1958 |
MAXIMUM PEAK FLOW | 594 | May 20 | 7330 C | Jun 4 2002 | ||
MAXIMUM PEAK STAGE | 5.08 | May 20 | 17.75 D | Jan 5 1946 | ||
INSTANTANEOUS LOW FLOW | 5.1 E | Jan 10 | 1.9 E | Jan 3 1976 | ||
ANNUAL RUNOFF (CFSM) | 0.85 | 0.33 | 0.72 | |||
ANNUAL RUNOFF (INCHES) | 11.57 | 4.48 | 9.85 | |||
10 PERCENT EXCEEDS | 157 | 65 | 177 | |||
50 PERCENT EXCEEDS | 82 | 44 | 64 | |||
90 PERCENT EXCEEDS | 56 | 27 | 26 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |