05539900 DATA: Discharge Tables, 1999

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.--July 1961 to current year.

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

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

REMARKS.--Records good except those for estimated daily discharges, which are poor. Diurnal fluctuation at low flow caused by sewage-treatment plant upstream from station. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	37	33	17	70	52	29	79	42	40	15	14
2	18	33	25	14	94	49	30	62	221	27	14	14
3	37	30	23	e17	88	55	31	57	71	22	13	13
4	23	27	22	e18	75	45	35	48	48	20	14	12
5	54	26	22	e20	62	43	33	44	41	18	13	13

6	44	26	42	e21	66	46	33	51	36	18	13	13
7	36	26	118	e21	56	46	30	48	31	15	15	14
8	25	27	55	e21	49	43	31	41	30	15	16	13
9	21	26	42	e21	47	42	181	37	26	30	15	13
10	20	192	35	e21	42	43	95	36	34	23	14	13

11	19	107	30	e20	54	47	71	36	44	18	14	13
12	18	63	28	e20	93	47	55	113	63	17	18	14
13	16	47	27	e21	61	51	48	67	178	16	19	21
14	16	41	26	e21	49	47	43	49	296	15	15	14
15	16	35	23	e21	43	54	52	42	99	14	15	13

16	15	33	23	22	40	79	211	39	70	14	14	13
17	123	30	23	24	39	139	127	87	54	15	13	12
18	528	27	22	52	36	108	88	64	44	16	13	12
19	229	26	22	36	34	79	77	50	38	17	27	13
20	104	24	22	29	32	60	65	40	33	18	19	14

21	79	22	21	28	32	51	76	42	31	25	16	13
22	65	23	20	304	31	45	304	212	27	36	15	12
23	52	22	e19	454	30	40	570	97	26	20	16	14
24	45	21	e19	468	29	37	304	75	25	32	27	16
25	39	21	19	200	30	37	140	56	22	21	39	17

26	32	21	18	120	30	35	101	45	22	19	38	18
27	36	20	18	112	73	34	126	41	23	17	21	19
28	60	21	19	130	63	34	327	35	23	15	18	116
29	40	21	19	96	---	32	140	33	21	15	17	127
30	53	34	18	83	---	30	98	30	20	15	15	43

31	43	---	18	73	---	30	---	33	---	15	15	---

TOTAL	1930	1109	871	2525	1448	1580	3551	1789	1739	618	546	666
MEAN	62.3	37.0	28.1	81.5	51.7	51.0	118	57.7	58.0	19.9	17.6	22.2
MAX	528	192	118	468	94	139	570	212	296	40	39	127
MIN	15	20	18	14	29	30	29	30	20	14	13	12
CFSM	2.18	1.30	.99	2.86	1.81	1.79	4.15	2.02	2.03	.70	.62	.78
IN.	2.52	1.45	1.14	3.30	1.89	2.06	4.63	2.34	2.27	.81	.71	.87

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1999, BY WATER YEAR (WY)
MEAN	24.2	33.0	34.4	30.8	38.4	54.2	62.3	45.1	37.8	26.3	29.0	27.0
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 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1961 - 1999
ANNUAL TOTAL	18121		18372
ANNUAL MEAN	49.6		50.3		36.8
HIGHEST ANNUAL MEAN					58.1	1993
LOWEST ANNUAL MEAN					6.41	1963
HIGHEST DAILY MEAN	528	Oct 18	570	Apr 23	817	Dec 3 1982
LOWEST DAILY MEAN	15	A	12	Sep 4,17,18,22	.20	Jul 5 1963
ANNUAL SEVEN-DAY MINIMUM	15	Sep 22	13	Sep 16	.26	Jul 5 1963
INSTANTANEOUS PEAK FLOW			666	Apr 23	984 B	Dec 3 1982
INSTANTANEOUS PEAK STAGE			9.32	Apr 23	10.78	Feb 21 1997
INSTANTANEOUS LOW FLOW			6.2 C	Jan 2	.20	D
ANNUAL RUNOFF (CFSM)	1.74		1.77		1.29
ANNUAL RUNOFF (INCHES)	23.65		23.98		17.56
10 PERCENT EXCEEDS	100		97		75
50 PERCENT EXCEEDS	33		31		23
90 PERCENT EXCEEDS	18		15		7.3

A - Sept. 22-25, 28, 29 and Oct. 16.
B - Gage height, 10.44 ft.
C - Result of freeze up.
D - 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 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	37	33	17	70	52	29	79	42	40	15	14
2	18	33	25	14	94	49	30	62	221	27	14	14
3	37	30	23	e17	88	55	31	57	71	22	13	13
4	23	27	22	e18	75	45	35	48	48	20	14	12
5	54	26	22	e20	62	43	33	44	41	18	13	13

6	44	26	42	e21	66	46	33	51	36	18	13	13
7	36	26	118	e21	56	46	30	48	31	15	15	14
8	25	27	55	e21	49	43	31	41	30	15	16	13
9	21	26	42	e21	47	42	181	37	26	30	15	13
10	20	192	35	e21	42	43	95	36	34	23	14	13

11	19	107	30	e20	54	47	71	36	44	18	14	13
12	18	63	28	e20	93	47	55	113	63	17	18	14
13	16	47	27	e21	61	51	48	67	178	16	19	21
14	16	41	26	e21	49	47	43	49	296	15	15	14
15	16	35	23	e21	43	54	52	42	99	14	15	13

16	15	33	23	22	40	79	211	39	70	14	14	13
17	123	30	23	24	39	139	127	87	54	15	13	12
18	528	27	22	52	36	108	88	64	44	16	13	12
19	229	26	22	36	34	79	77	50	38	17	27	13
20	104	24	22	29	32	60	65	40	33	18	19	14

21	79	22	21	28	32	51	76	42	31	25	16	13
22	65	23	20	304	31	45	304	212	27	36	15	12
23	52	22	e19	454	30	40	570	97	26	20	16	14
24	45	21	e19	468	29	37	304	75	25	32	27	16
25	39	21	19	200	30	37	140	56	22	21	39	17

26	32	21	18	120	30	35	101	45	22	19	38	18
27	36	20	18	112	73	34	126	41	23	17	21	19
28	60	21	19	130	63	34	327	35	23	15	18	116
29	40	21	19	96	---	32	140	33	21	15	17	127
30	53	34	18	83	---	30	98	30	20	15	15	43

31	43	---	18	73	---	30	---	33	---	15	15	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	37	33	17	70	52	29	79	42	40	15	14
2	18	33	25	14	94	49	30	62	221	27	14	14
3	37	30	23	e17	88	55	31	57	71	22	13	13
4	23	27	22	e18	75	45	35	48	48	20	14	12
5	54	26	22	e20	62	43	33	44	41	18	13	13

6	44	26	42	e21	66	46	33	51	36	18	13	13
7	36	26	118	e21	56	46	30	48	31	15	15	14
8	25	27	55	e21	49	43	31	41	30	15	16	13
9	21	26	42	e21	47	42	181	37	26	30	15	13
10	20	192	35	e21	42	43	95	36	34	23	14	13

11	19	107	30	e20	54	47	71	36	44	18	14	13
12	18	63	28	e20	93	47	55	113	63	17	18	14
13	16	47	27	e21	61	51	48	67	178	16	19	21
14	16	41	26	e21	49	47	43	49	296	15	15	14
15	16	35	23	e21	43	54	52	42	99	14	15	13

16	15	33	23	22	40	79	211	39	70	14	14	13
17	123	30	23	24	39	139	127	87	54	15	13	12
18	528	27	22	52	36	108	88	64	44	16	13	12
19	229	26	22	36	34	79	77	50	38	17	27	13
20	104	24	22	29	32	60	65	40	33	18	19	14

21	79	22	21	28	32	51	76	42	31	25	16	13
22	65	23	20	304	31	45	304	212	27	36	15	12
23	52	22	e19	454	30	40	570	97	26	20	16	14
24	45	21	e19	468	29	37	304	75	25	32	27	16
25	39	21	19	200	30	37	140	56	22	21	39	17

26	32	21	18	120	30	35	101	45	22	19	38	18
27	36	20	18	112	73	34	126	41	23	17	21	19
28	60	21	19	130	63	34	327	35	23	15	18	116
29	40	21	19	96	---	32	140	33	21	15	17	127
30	53	34	18	83	---	30	98	30	20	15	15	43

31	43	---	18	73	---	30	---	33	---	15	15	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	24	37	33	17	70	52	29	79	42	40	15	14
2	18	33	25	14	94	49	30	62	221	27	14	14
3	37	30	23	e17	88	55	31	57	71	22	13	13
4	23	27	22	e18	75	45	35	48	48	20	14	12
5	54	26	22	e20	62	43	33	44	41	18	13	13

6	44	26	42	e21	66	46	33	51	36	18	13	13
7	36	26	118	e21	56	46	30	48	31	15	15	14
8	25	27	55	e21	49	43	31	41	30	15	16	13
9	21	26	42	e21	47	42	181	37	26	30	15	13
10	20	192	35	e21	42	43	95	36	34	23	14	13

11	19	107	30	e20	54	47	71	36	44	18	14	13
12	18	63	28	e20	93	47	55	113	63	17	18	14
13	16	47	27	e21	61	51	48	67	178	16	19	21
14	16	41	26	e21	49	47	43	49	296	15	15	14
15	16	35	23	e21	43	54	52	42	99	14	15	13

16	15	33	23	22	40	79	211	39	70	14	14	13
17	123	30	23	24	39	139	127	87	54	15	13	12
18	528	27	22	52	36	108	88	64	44	16	13	12
19	229	26	22	36	34	79	77	50	38	17	27	13
20	104	24	22	29	32	60	65	40	33	18	19	14

21	79	22	21	28	32	51	76	42	31	25	16	13
22	65	23	20	304	31	45	304	212	27	36	15	12
23	52	22	e19	454	30	40	570	97	26	20	16	14
24	45	21	e19	468	29	37	304	75	25	32	27	16
25	39	21	19	200	30	37	140	56	22	21	39	17

26	32	21	18	120	30	35	101	45	22	19	38	18
27	36	20	18	112	73	34	126	41	23	17	21	19
28	60	21	19	130	63	34	327	35	23	15	18	116
29	40	21	19	96	---	32	140	33	21	15	17	127
30	53	34	18	83	---	30	98	30	20	15	15	43

31	43	---	18	73	---	30	---	33	---	15	15	---