LOCATION.-- Lat 42°04'16", long 87°41'09" (NAD of 1927), in NE1/4SW1/4 sec.35, T.42 S., R.13 W., Cook County, Hydrologic Unit 07120003, on left bank at downstream side of bridge on Maple Avenue, 0.25 mi downstream from Wilmette Controlling Works, and at mile 7.3. |
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DRAINAGE AREA.-- Undetermined. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1999 to current year. |
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GAGE.-- Water-stage recorder, acoustic velocity meter, and phone telemetry. Datum of gage is 579.48 ft above NGVD of 1929 (Chicago City Datum). |
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REMARKS.--Estimated daily discharges determined from a regression relation between USGS mean discharges and mean daily discharges for the Metropolitan Water Reclamation District's Wilmette Controlling Works located 0.5 miles upstream. |
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EXTREMES FOR PERIOD OF RECORD.-- Maximum daily discharge, 241 ft3/s, Aug. 12-14, 2003, estimated by regression; minimum daily discharge, -58 ft3/s, Oct. 13, 2001. |
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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 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES |
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DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
1 | 20 | e20 | -1.9 | 4.3 | 2.1 | 12 | e21 | -0.27 | -4.3 | 42 | 58 | 81 |
2 | 15 | e18 | -4.8 | 2.3 | 0.30 | 1.2 | e32 | 8.6 | 1.4 | 35 | 88 | 104 |
3 | 8.7 | e12 | -2.7 | 2.8 | 2.0 | 6.6 | e27 | -1.8 | 31 | 17 | 119 | 101 |
4 | 12 | e10 | 12 | 4.8 | 4.1 | -0.21 | e3 | -4.3 | 11 | 40 | 99 | 141 |
5 | 8.3 | e8 | -0.06 | 0.04 | -1.0 | 6.2 | e1 | 2.1 | 0.91 | 53 | 32 | 133 |
6 | 18 | e6 | 0.35 | -2.2 | -4.6 | 2.9 | 41 | -6.8 | 5.4 | 61 | 41 | 112 |
7 | 13 | e1 | -0.66 | -2.4 | 0.08 | 2.0 | 8.4 | -4.1 | -3.6 | 68 | 29 | 89 |
8 | 13 | e1 | -2.6 | 0.29 | -0.77 | 0.23 | 6.4 | -8.9 | 9.4 | 47 | 51 | 82 |
9 | 38 | e0.0 | -1.6 | 0.37 | 4.1 | 5.8 | 4.2 | -0.48 | -0.14 | 48 | 88 | 94 |
10 | 38 | e0.0 | -0.34 | 0.50 | 1.4 | 8.7 | -0.21 | 1.1 | -0.22 | 25 | 71 | 42 |
11 | 33 | e0.0 | -2.2 | -2.5 | 3.5 | 4.5 | e1 | -1.5 | 10 | 44 | 107 | 24 |
12 | 23 | e0.0 | -1.1 | 6.3 | 3.0 | 1.6 | e1 | -0.22 | 6.6 | 49 | 102 | -47 |
13 | 22 | e0.0 | 2.9 | 3.8 | -0.40 | 0.29 | e1 | -1.2 | 3.7 | 66 | 73 | 42 |
14 | 28 | e0.0 | -0.57 | 6.6 | 9.2 | -0.48 | e7 | 0.36 | 20 | 51 | 108 | 25 |
15 | 18 | e0.0 | 1.0 | 2.5 | 3.9 | 6.0 | e1 | 20 | -0.92 | 64 | 53 | 59 |
16 | 4.3 | e0.0 | -0.81 | 2.6 | 4.5 | 7.7 | e1 | 95 | 3.0 | 69 | 90 | 51 |
17 | 30 | e0.0 | 3.3 | 2.9 | 1.7 | 12 | e1 | 126 | 9.6 | 93 | 37 | 42 |
18 | 28 | e0.0 | 0.86 | -0.41 | 5.1 | 2.6 | e1 | 51 | 25 | 95 | 72 | 36 |
19 | 31 | -0.94 | 1.8 | 0.55 | 4.6 | 9.7 | -0.67 | -2.8 | 6.6 | 109 | 99 | 44 |
20 | 31 | -0.57 | 2.0 | 0.00 | 0.19 | 7.0 | 30 | 0.65 | 20 | 103 | 103 | 30 |
21 | 18 | 0.11 | -0.22 | -2.7 | -0.97 | 2.3 | 13 | -3.2 | 32 | 113 | 110 | 33 |
22 | 25 | -0.20 | -0.61 | -1.9 | 3.8 | 3.1 | -0.66 | 0.12 | 38 | 90 | 41 | 16 |
23 | 27 | 0.11 | 1.1 | -2.8 | 3.7 | 13 | 3.8 | 0.21 | 46 | 59 | 90 | 24 |
24 | 23 | 3.1 | 1.1 | -5.3 | 10 | -7.4 | 3.9 | -3.8 | 25 | 54 | 74 | 35 |
25 | 11 | -0.37 | -1.7 | 0.74 | 0.49 | 6.6 | 2.1 | -1.6 | 44 | 56 | 79 | 36 |
26 | e24 | -0.50 | 3.7 | 2.6 | 1.3 | -3.4 | 1.4 | 12 | 49 | 62 | 61 | 41 |
27 | e27 | 3.6 | 1.2 | 1.8 | 4.8 | -0.34 | 1.6 | 11 | 54 | 61 | 119 | 37 |
28 | e27 | 2.1 | -0.01 | 1.7 | 0.65 | e1 | 1.1 | -1.8 | 34 | 48 | 103 | 38 |
29 | e22 | 2.1 | 0.45 | 2.2 | -3.5 | e1 | 6.6 | 1.9 | 50 | 90 | 94 | 29 |
30 | e20 | 1.8 | 1.0 | 2.5 | --- | e1 | -7.4 | -7.7 | 60 | 33 | 92 | 29 |
31 | e18 | --- | 1.9 | 2.5 | --- | e1 | --- | -1.5 | --- | 2.1 | 96 | --- |
TOTAL | 674.3 | 86.34 | 12.78 | 34.48 | 63.27 | 114.19 | 212.56 | 278.07 | 586.43 | 1847.1 | 2479 | 1603 |
MEAN | 21.8 | 2.88 | 0.41 | 1.11 | 2.18 | 3.68 | 7.09 | 8.97 | 19.5 | 59.6 | 80.0 | 53.4 |
MAX | 38 | 20 | 12 | 6.6 | 10 | 13 | 41 | 126 | 60 | 113 | 119 | 141 |
MIN | 4.3 | -0.94 | -4.8 | -5.3 | -4.6 | -7.4 | -7.4 | -8.9 | -4.3 | 2.1 | 29 | -47 |
e Estimated |
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2000 - 2000, BY WATER YEAR (WY) | ||||||||||||
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MEAN | 21.8 | 2.88 | 0.41 | 1.11 | 2.18 | 3.68 | 7.09 | 8.97 | 19.5 | 59.6 | 80.0 | 53.4 |
MAX | 21.8 | 2.88 | 0.41 | 1.11 | 2.18 | 3.68 | 7.09 | 8.97 | 19.5 | 59.6 | 80.0 | 53.4 |
(WY) | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 |
MIN | 21.8 | 2.88 | 0.41 | 1.11 | 2.18 | 3.68 | 7.09 | 8.97 | 19.5 | 59.6 | 80.0 | 53.4 |
(WY) | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 |
SUMMARY STATISTICS | FOR 2000 WATER YEAR | |||||
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ANNUAL TOTAL | 7991.52 | |||||
ANNUAL MEAN | 21.8 | |||||
HIGHEST DAILY MEAN | 141 | Sep 4 | ||||
LOWEST DAILY MEAN | -47 A | Sep 12 | ||||
ANNUAL SEVEN-DAY MINIMUM | -3.5 | May 3 | ||||
10 PERCENT EXCEEDS | 76 | |||||
50 PERCENT EXCEEDS | 4.8 | |||||
90 PERCENT EXCEEDS | -1.1 |
A - May have been less during missing-record period Nov. 9-18. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |