Station list
05535500 WEST FORK OF NORTH BRANCH CHICAGO RIVER AT NORTHBROOK, IL
LOCATION.--Lat 42°08'18", long 87°50'04", in SW¼SE¼ sec.4, T.42 N., R.12 E., Cook County, Hydrologic Unit 07120003, on
left bank at upstream side of bridge on State Highway 68 at Northbrook, and at mile 7.9.
DRAINAGE AREA.--11.5 mi2.
PERIOD OF RECORD.--August 1952 to current year.
GAGE.--Water-stage recorder. Datum of gage is 637.98 ft above sea level (Cook County Highway Department bench mark).
REMARKS.--Records good except those for estimated daily discharges, which are poor. Effluent from sewage-treatment plant,
1.7 mi upstream, averaged about 5.4 ft3/s per day, with a maximum of 7.4 ft3/s in February and a minimum of 3.8 ft3/s in October.
Gage-height telemeter at station.
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
|
|---|
| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP
|
|---|
| |
| 1 | 7.5 | 5.4 | 11 | 6.1 | 41 | 10 | 100 | 11 | 5.2 | 7.2 | 2.9 | 5.1
|
| 2 | 6.2 | 4.5 | 8.4 | 13 | 89 | 11 | 56 | 10 | 4.8 | 5.0 | 2.8 | 4.9
|
| 3 | 3.7 | 4.5 | 13 | 45 | 41 | 12 | 24 | 9.1 | 4.6 | 50 | 3.5 | 6.6
|
| 4 | 4.3 | 4.4 | 9.0 | 85 | 25 | 9.2 | 18 | 8.5 | 4.6 | 49 | 19 | 5.4
|
| 5 | 3.9 | 4.5 | 7.6 | 65 | 18 | 8.4 | 13 | 11 | 6.8 | 11 | 12 | 4.8
|
| |
| 6 | 4.6 | 30 | 6.5 | 63 | 16 | 8.2 | 11 | 15 | 5.0 | 7.1 | 9.1 | 4.2
|
| 7 | 4.0 | 8.1 | 5.4 | 73 | 14 | 7.5 | 35 | 144 | 4.8 | 35 | 18 | 26 |
| 8 | 4.9 | 5.7 | 5.2 | 59 | 12 | 126 | 158 | 93 | 5.3 | 9.5 | 10 | 8.2
|
| 9 | 7.8 | 5.1 | 6.3 | 79 | 11 | 136 | 95 | 32 | 15 | 8.4 | 5.4 | 6.3
|
| 10 | 7.5 | 4.8 | 66 | 24 | 11 | 60 | 52 | 20 | 7.6 | 5.8 | 4.2 | 5.7
|
| |
| 11 | 7.7 | 4.9 | 54 | 12 | 106 | 29 | 25 | 16 | 30 | 3.9 | 3.7 | 5.0
|
| 12 | 4.7 | 4.9 | 18 | e11 | 118 | 19 | 19 | 12 | 13 | 3.0 | 3.5 | 4.5
|
| 13 | 19 | 4.7 | 12 | e10 | 36 | 18 | 18 | 22 | 18 | 3.1 | 3.4 | 4.5
|
| 14 | 6.3 | 6.7 | 8.8 | e9.8 | 21 | 19 | 15 | 14 | 7.0 | 3.0 | 3.4 | 18 |
| 15 | 4.2 | 29 | 9.1 | e9.0 | 18 | 17 | 14 | 11 | 5.2 | 3.0 | 3.7 | 18 |
| |
| 16 | 3.7 | 12 | 9.8 | e8.6 | 20 | 15 | 38 | 9.1 | 3.4 | 3.1 | 3.1 | 8.3
|
| 17 | 3.4 | 8.0 | 9.4 | e8.0 | 65 | 75 | 23 | 8.2 | 4.2 | 3.0 | 3.6 | 6.7
|
| 18 | 3.1 | 7.2 | 8.2 | e7.5 | 104 | 207 | 17 | 6.8 | 25 | 2.9 | 3.3 | 6.1
|
| 19 | 3.1 | 6.4 | 7.8 | e7.2 | 35 | 126 | 12 | 5.1 | 23 | 5.2 | 3.3 | 5.1
|
| 20 | 3.2 | 10 | 7.3 | 7.0 | 24 | 53 | 23 | 4.6 | 7.8 | 3.4 | 3.3 | 16 |
| |
| 21 | 3.2 | 12 | 7.1 | 7.3 | 18 | 32 | 37 | 4.1 | 4.2 | 4.1 | 3.5 | 8.5
|
| 22 | 3.2 | 9.8 | 12 | 8.6 | 15 | 24 | 23 | 3.8 | 3.7 | 3.7 | 3.6 | 6.3
|
| 23 | 3.5 | 7.8 | 7.7 | 10 | 13 | 20 | 16 | 3.8 | 3.5 | 4.4 | 3.3 | 5.1
|
| 24 | 7.7 | 6.8 | 8.9 | 8.5 | 16 | 18 | 12 | 4.5 | 3.1 | 4.1 | 4.1 | 6.6
|
| 25 | 7.6 | 6.5 | 46 | 7.6 | 11 | 17 | 10 | 6.1 | 13 | 3.6 | 21 | 5.2
|
| |
| 26 | 80 | 6.7 | 16 | 8.7 | 9.6 | 12 | 27 | 6.0 | 105 | 3.1 | 6.9 | 5.0
|
| 27 | 74 | 20 | 10 | 10 | 18 | 9.5 | 20 | 5.2 | 33 | 3.7 | 5.5 | 4.6
|
| 28 | 12 | 11 | 7.7 | 11 | 12 | 14 | 13 | 5.1 | 74 | 3.7 | 18 | 5.2
|
| 29 | 7.1 | 15 | 8.4 | 19 | --- | 9.2 | 16 | 7.1 | 20 | 3.4 | 7.6 | 5.1
|
| 30 | 6.3 | 14 | 7.3 | 15 | --- | 8.9 | 12 | 5.3 | 9.9 | 3.2 | 5.6 | 9.6
|
| |
| 31 | 5.3 | --- | 6.2 | 15 | --- | 101 | --- | 5.2 | --- | 3.2 | 5.7 | --- |
| TOTAL | 322.7 | 280.4 | 420.1 | 722.9 | 937.6 | 1231.9 | 952 | 518.6 | 469.7 | 261.8 | 206.0 | 230.6
|
| MEAN | 10.4 | 9.35 | 13.6 | 23.3 | 33.5 | 39.7 | 31.7 | 16.7 | 15.7 | 8.45 | 6.65 | 7.69
|
| MAX | 80 | 30 | 66 | 85 | 118 | 207 | 158 | 144 | 105 | 50 | 21 | 26
|
| MIN | 3.1 | 4.4 | 5.2 | 6.1 | 9.6 | 7.5 | 10 | 3.8 | 3.1 | 2.9 | 2.8 | 4.2
|
| CFSM | .91 | .81 | 1.18 | 2.03 | 2.91 | 3.46 | 2.76 | 1.45 | 1.36 | .73 | .58 | .67
|
| IN. | 1.04 | .91 | 1.36 | 2.34 | 3.03 | 3.98 | 3.08 | 1.68 | 1.52 | .85 | .67 | .75
|
e Estimated
| STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 1998, BY WATER YEAR (WY)
|
|---|
| MEAN | 8.08 | 11.2 | 12.2 | 9.58 | 13.9 | 23.7 | 24.8 | 15.6 | 14.1 | 11.2 | 10.8 | 9.74
|
| MAX | 23.1 | 40.4 | 51.2 | 40.0 | 43.2 | 86.6 | 57.3 | 67.3 | 41.6 | 59.2 | 57.5 | 50.0
|
| (WY) | 1987 | 1986 | 1983 | 1974 | 1997 | 1979 | 1983 | 1996 | 1978 | 1982 | 1987 | 1986
|
| MIN | .24 | .34 | .54 | .38 | 1.04 | 3.01 | 6.58 | 4.61 | 1.51 | .50 | .47 | .24
|
| (WY) | 1954 | 1954 | 1954 | 1954 | 1963 | 1956 | 1953 | 1953 | 1956 | 1956 | 1955 | 1952
|
| SUMMARY STATISTICS | FOR 1997 CALENDAR YEAR | FOR 1998 WATER YEAR | WATER YEARS 1952 - 1998 |
|---|
| ANNUAL TOTAL | 5454.9 | | 6554.3 | | |
|
| ANNUAL MEAN | 14.9 | | 18.0 | | 13.7 |
|
| HIGHEST ANNUAL MEAN | | | | | 22.5 | 1993
|
| LOWEST ANNUAL MEAN | | | | | 2.96 | 1953
|
| HIGHEST DAILY MEAN | 306 | Feb 21 | 207 | Mar 18 | 753 | Aug 14 1987
|
| LOWEST DAILY MEAN | 2.9 | Sep 13 | 2.8 | Aug 2 | .00 | A
|
| ANNUAL SEVEN-DAY MINIMUM | 3.1 | Sep 7 | 3.0 | Jul 12 | .00 | Oct 27 1956
|
| INSTANTANEOUS PEAK FLOW | | | 374 | Jun 25 | 1190 | Aug 14 1987
|
| INSTANTANEOUS PEAK STAGE | | | 5.71 | Jun 25 | 10.10 | Aug 14 1987
|
| INSTANTANEOUS LOW FLOW | | | 1.5 | B | |
|
| ANNUAL RUNOFF (CFSM) | 1.30 | | 1.56 | | 1.19 |
|
| ANNUAL RUNOFF (INCHES) | 17.65 | | 21.20 | | 16.23 |
|
| 10 PERCENT EXCEEDS | 32 | | 43 | | 28 |
|
| 50 PERCENT EXCEEDS | 7.6 | | 8.6 | | 6.0 |
|
| 90 PERCENT EXCEEDS | 3.7 | | 3.6 | | 1.8 |
|
A - At times in several years.
B - July 22, Aug. 1, 2.