05539900 DATA: Discharge Tables, 2000

ILLINOIS RIVER BASIN

05539900 WEST BRANCH DU PAGE RIVER NEAR WEST CHICAGO, IL

LOCATION.-- Lat 41°54'39", long 88°10'44", in SE1/4NW1/4 sec.35, T.40 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on left bank at downstream side of bridge on State Highway 64, 2 mi northeast of West Chicago, and at mile 49.2.

DRAINAGE AREA.-- 28.5 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: July 1961 to current year.

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1979-91.

REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-77-1: 1966-67(M).

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 717.76 ft above sea level.

REMARKS.-- Diurnal fluctuation at low flow caused by sewage-treatment plant upstream from station.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	31	16	15	16	15	34	25	38	53	20	58	14
2	24	15	16	16	15	30	26	37	64	18	34	15
3	34	14	20	19	15	27	27	32	35	212	24	15
4	70	14	20	26	15	25	26	32	29	83	18	16
5	32	14	157	21	15	25	25	33	52	49	29	17

6	24	14	69	18	15	25	25	31	37	37	60	15
7	21	14	36	18	15	24	33	29	27	28	61	14
8	19	14	28	17	14	22	51	29	24	26	33	15
9	19	13	24	23	15	22	40	66	22	23	28	16
10	20	14	21	35	20	23	34	74	21	71	e17	16

11	19	14	20	29	25	22	33	56	35	46	e16	80
12	17	14	19	23	22	23	31	49	46	32	e15	418
13	16	15	19	20	21	23	28	36	42	24	e15	158
14	16	18	17	19	21	21	29	27	37	21	e14	128
15	15	15	19	18	19	23	28	23	41	19	e14	92

16	15	14	20	e17	20	24	32	28	27	18	21	65
17	17	14	18	e16	21	21	151	30	23	17	67	46
18	16	13	18	e16	21	21	71	35	20	16	40	34
19	e15	14	18	16	22	22	111	67	18	15	27	31
20	e14	14	19	17	23	39	357	36	35	15	22	43

21	15	15	20	e17	25	32	402	29	32	15	20	52
22	14	16	19	e18	75	29	174	28	20	15	18	85
23	14	19	16	e17	94	25	116	27	18	15	19	156
24	15	18	17	e17	120	25	93	26	45	15	18	104
25	15	16	16	e16	100	26	69	22	153	15	16	76

26	14	16	14	e16	74	25	64	21	49	14	15	50
27	13	15	16	e15	57	28	61	25	32	14	e19	43
28	13	15	15	e15	42	27	53	40	25	15	19	36
29	14	17	13	e16	36	25	43	36	24	17	16	29
30	14	15	15	e16	---	25	38	30	24	16	16	27

31	16	---	15	e16	---	25	---	39	---	71	15	---

TOTAL	611	449	769	579	992	788	2296	1111	1110	1012	804	1906
MEAN	19.7	15.0	24.8	18.7	34.2	25.4	76.5	35.8	37.0	32.6	25.9	63.5
MAX	70	19	157	35	120	39	402	74	153	212	67	418
MIN	13	13	13	15	14	21	25	21	18	14	14	14
CFSM	.69	.53	.87	.66	1.20	.89	2.69	1.26	1.30	1.15	.91	2.23
IN.	.80	.59	1.00	.76	1.29	1.03	3.00	1.45	1.45	1.32	1.05	2.49

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2000, BY WATER YEAR (WY)
MEAN	24.1	32.6	34.1	30.5	38.3	53.5	62.6	44.8	37.8	26.5	28.9	27.9
MAX	68.0	111	134	81.5	118	191	135	113	103	63.8	135	115
(WY)	1987	1986	1983	1999	1997	1979	1983	1996	1996	1993	1987	1972
MIN	1.54	1.62	.97	.87	.75	12.3	14.7	13.9	2.02	5.36	1.50	1.22
(WY)	1964	1963	1963	1963	1963	1968	1963	1971	1963	1966	1961	1962

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1961 - 2000
ANNUAL TOTAL	16291		12427
ANNUAL MEAN	44.6		34.0		36.8
HIGHEST ANNUAL MEAN					58.1	1993
LOWEST ANNUAL MEAN					6.41	1963
HIGHEST DAILY MEAN	570	Apr 23	418	Sep 12	817	Dec 3 1982
LOWEST DAILY MEAN	12	Sep 4,17,18,22	13	A	.20	Jul 5 1963
ANNUAL SEVEN-DAY MINIMUM	13	Sep 16	14	Nov 3	.26	Jul 5 1963
INSTANTANEOUS PEAK FLOW			517	Apr 20	984 B	Dec 3 1982
INSTANTANEOUS PEAK STAGE			8.28	Apr 20	10.78	Feb 21 1997
INSTANTANEOUS LOW FLOW			8.5	Sep 6	.20	C
ANNUAL RUNOFF (CFSM)	1.57		1.19		1.29
ANNUAL RUNOFF (INCHES)	21.26		16.22		17.53
10 PERCENT EXCEEDS	88		64		75
50 PERCENT EXCEEDS	24		22		23
90 PERCENT EXCEEDS	14		15		7.4

A - Oct. 27, 28, Nov. 9, 18, Dec. 29.
B - Gage height, 10.44 ft.
C - July 1, 5, 8-12, 1963.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	31	16	15	16	15	34	25	38	53	20	58	14
2	24	15	16	16	15	30	26	37	64	18	34	15
3	34	14	20	19	15	27	27	32	35	212	24	15
4	70	14	20	26	15	25	26	32	29	83	18	16
5	32	14	157	21	15	25	25	33	52	49	29	17

6	24	14	69	18	15	25	25	31	37	37	60	15
7	21	14	36	18	15	24	33	29	27	28	61	14
8	19	14	28	17	14	22	51	29	24	26	33	15
9	19	13	24	23	15	22	40	66	22	23	28	16
10	20	14	21	35	20	23	34	74	21	71	e17	16

11	19	14	20	29	25	22	33	56	35	46	e16	80
12	17	14	19	23	22	23	31	49	46	32	e15	418
13	16	15	19	20	21	23	28	36	42	24	e15	158
14	16	18	17	19	21	21	29	27	37	21	e14	128
15	15	15	19	18	19	23	28	23	41	19	e14	92

16	15	14	20	e17	20	24	32	28	27	18	21	65
17	17	14	18	e16	21	21	151	30	23	17	67	46
18	16	13	18	e16	21	21	71	35	20	16	40	34
19	e15	14	18	16	22	22	111	67	18	15	27	31
20	e14	14	19	17	23	39	357	36	35	15	22	43

21	15	15	20	e17	25	32	402	29	32	15	20	52
22	14	16	19	e18	75	29	174	28	20	15	18	85
23	14	19	16	e17	94	25	116	27	18	15	19	156
24	15	18	17	e17	120	25	93	26	45	15	18	104
25	15	16	16	e16	100	26	69	22	153	15	16	76

26	14	16	14	e16	74	25	64	21	49	14	15	50
27	13	15	16	e15	57	28	61	25	32	14	e19	43
28	13	15	15	e15	42	27	53	40	25	15	19	36
29	14	17	13	e16	36	25	43	36	24	17	16	29
30	14	15	15	e16	---	25	38	30	24	16	16	27

31	16	---	15	e16	---	25	---	39	---	71	15	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	31	16	15	16	15	34	25	38	53	20	58	14
2	24	15	16	16	15	30	26	37	64	18	34	15
3	34	14	20	19	15	27	27	32	35	212	24	15
4	70	14	20	26	15	25	26	32	29	83	18	16
5	32	14	157	21	15	25	25	33	52	49	29	17

6	24	14	69	18	15	25	25	31	37	37	60	15
7	21	14	36	18	15	24	33	29	27	28	61	14
8	19	14	28	17	14	22	51	29	24	26	33	15
9	19	13	24	23	15	22	40	66	22	23	28	16
10	20	14	21	35	20	23	34	74	21	71	e17	16

11	19	14	20	29	25	22	33	56	35	46	e16	80
12	17	14	19	23	22	23	31	49	46	32	e15	418
13	16	15	19	20	21	23	28	36	42	24	e15	158
14	16	18	17	19	21	21	29	27	37	21	e14	128
15	15	15	19	18	19	23	28	23	41	19	e14	92

16	15	14	20	e17	20	24	32	28	27	18	21	65
17	17	14	18	e16	21	21	151	30	23	17	67	46
18	16	13	18	e16	21	21	71	35	20	16	40	34
19	e15	14	18	16	22	22	111	67	18	15	27	31
20	e14	14	19	17	23	39	357	36	35	15	22	43

21	15	15	20	e17	25	32	402	29	32	15	20	52
22	14	16	19	e18	75	29	174	28	20	15	18	85
23	14	19	16	e17	94	25	116	27	18	15	19	156
24	15	18	17	e17	120	25	93	26	45	15	18	104
25	15	16	16	e16	100	26	69	22	153	15	16	76

26	14	16	14	e16	74	25	64	21	49	14	15	50
27	13	15	16	e15	57	28	61	25	32	14	e19	43
28	13	15	15	e15	42	27	53	40	25	15	19	36
29	14	17	13	e16	36	25	43	36	24	17	16	29
30	14	15	15	e16	---	25	38	30	24	16	16	27

31	16	---	15	e16	---	25	---	39	---	71	15	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	31	16	15	16	15	34	25	38	53	20	58	14
2	24	15	16	16	15	30	26	37	64	18	34	15
3	34	14	20	19	15	27	27	32	35	212	24	15
4	70	14	20	26	15	25	26	32	29	83	18	16
5	32	14	157	21	15	25	25	33	52	49	29	17

6	24	14	69	18	15	25	25	31	37	37	60	15
7	21	14	36	18	15	24	33	29	27	28	61	14
8	19	14	28	17	14	22	51	29	24	26	33	15
9	19	13	24	23	15	22	40	66	22	23	28	16
10	20	14	21	35	20	23	34	74	21	71	e17	16

11	19	14	20	29	25	22	33	56	35	46	e16	80
12	17	14	19	23	22	23	31	49	46	32	e15	418
13	16	15	19	20	21	23	28	36	42	24	e15	158
14	16	18	17	19	21	21	29	27	37	21	e14	128
15	15	15	19	18	19	23	28	23	41	19	e14	92

16	15	14	20	e17	20	24	32	28	27	18	21	65
17	17	14	18	e16	21	21	151	30	23	17	67	46
18	16	13	18	e16	21	21	71	35	20	16	40	34
19	e15	14	18	16	22	22	111	67	18	15	27	31
20	e14	14	19	17	23	39	357	36	35	15	22	43

21	15	15	20	e17	25	32	402	29	32	15	20	52
22	14	16	19	e18	75	29	174	28	20	15	18	85
23	14	19	16	e17	94	25	116	27	18	15	19	156
24	15	18	17	e17	120	25	93	26	45	15	18	104
25	15	16	16	e16	100	26	69	22	153	15	16	76

26	14	16	14	e16	74	25	64	21	49	14	15	50
27	13	15	16	e15	57	28	61	25	32	14	e19	43
28	13	15	15	e15	42	27	53	40	25	15	19	36
29	14	17	13	e16	36	25	43	36	24	17	16	29
30	14	15	15	e16	---	25	38	30	24	16	16	27

31	16	---	15	e16	---	25	---	39	---	71	15	---