USGS CD-ROM: Current Year Discharge

05540160 EAST BRANCH DU PAGE RIVER NEAR DOWNERS GROVE, IL

LOCATION.--Lat 41°49'54", long 88°02'51", in SE¼SW¼ sec.25, T.39 N., R.10 E., Du Page County, Hydrologic Unit 07120004, on upstream side of bridge on State Highway 56, 2.2 mi northwest of Downers Grove, and at mile 15.0.

DRAINAGE AREA.--26.6 mi².

PERIOD OF RECORD.--Annual maximum, water years 1961-76. October 1989 to current year.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 660.00 ft above sea level. Prior to July 19, 1989, at datum 12.21 ft higher.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station. 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	20	28	34	26	67	26	138	52	28	36	18	27
2	18	28	30	34	117	23	124	47	29	30	16	21
3	18	28	30	61	91	22	90	44	27	62	24	24
4	19	25	30	112	71	26	63	43	25	190	101	29
5	19	24	28	148	57	21	55	46	26	79	219	26

6	19	36	26	153	50	17	50	45	26	50	317	24
7	19	31	26	142	46	15	e47	347	20	57	198	392
8	18	29	24	129	44	57	e140	499	20	51	111	164
9	22	27	25	135	42	125	e120	279	72	39	71	77
10	19	26	38	102	40	78	e105	145	50	33	55	50

11	18	21	41	77	105	49	e90	96	137	30	42	27
12	18	20	38	59	126	31	e60	75	112	29	33	27
13	42	22	33	47	95	41	e52	59	62	28	24	29
14	31	22	31	41	56	56	e60	39	44	31	27	37
15	25	28	29	40	53	52	e70	45	38	27	22	74

16	23	30	28	37	52	53	e117	41	33	25	22	51
17	21	26	28	37	79	103	99	37	30	23	29	51
18	20	25	27	34	92	303	75	37	41	23	28	26
19	20	24	27	33	72	294	52	35	80	40	23	27
20	20	24	26	30	60	175	70	35	51	35	22	28

21	19	24	24	21	50	117	111	37	41	32	23	25
22	19	24	28	26	46	83	100	32	34	35	22	27
23	18	23	27	32	43	72	79	31	32	29	24	25
24	21	22	31	32	44	44	61	63	30	25	32	24
25	21	22	49	31	38	47	53	40	28	23	131	25

26	43	22	44	32	34	49	54	35	e180	23	92	26
27	96	31	36	32	37	45	74	41	e120	23	58	24
28	57	40	32	34	30	53	51	42	e70	24	62	22
29	39	45	32	44	---	47	61	33	e60	23	48	25
30	31	42	30	48	---	43	62	27	e46	19	38	39

31	29	---	28	48	---	95	---	28	---	25	33	---

TOTAL	822	819	960	1857	1737	2262	2383	2455	1592	1199	1965	1473
MEAN	26.5	27.3	31.0	59.9	62.0	73.0	79.4	79.2	53.1	38.7	63.4	49.1
MAX	96	45	49	153	126	303	140	499	180	190	317	392
MIN	18	20	24	21	30	15	47	27	20	19	16	21
CFSM	1.00	1.03	1.16	2.25	2.33	2.74	2.99	2.98	1.99	1.45	2.38	1.85
IN.	1.15	1.15	1.34	2.60	2.43	3.16	3.33	3.43	2.23	1.68	2.75	2.06

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1998, BY WATER YEAR (WY)
MEAN	32.3	52.9	38.8	48.4	54.8	60.6	70.2	68.1	55.8	37.8	41.2	31.9
MAX	60.1	92.8	56.2	100	138	87.8	139	121	97.2	96.5	63.4	49.6
(WY)	1992	1991	1991	1993	1997	1993	1993	1990	1993	1996	1998	1993
MIN	18.5	21.8	16.3	25.4	28.9	29.9	33.3	22.2	21.5	19.9	18.4	19.7
(WY)	1990	1990	1990	1994	1996	1996	1990	1992	1992	1991	1991	1995

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1990 - 1998
ANNUAL TOTAL	17450		19524
ANNUAL MEAN	47.8		53.5		49.3
HIGHEST ANNUAL MEAN					64.1	1993
LOWEST ANNUAL MEAN					38.5	1994
HIGHEST DAILY MEAN	746	Feb 21	499	May 8	853	Jul 18 1996
LOWEST DAILY MEAN	17	Aug 2	15	Mar 7	11	A
ANNUAL SEVEN-DAY MINIMUM	19	Sep 9	19	Oct 2	12	Aug 14 1992
INSTANTANEOUS PEAK FLOW			547	May 8	936	Jul 18 1996
INSTANTANEOUS PEAK STAGE			14.18	May 8	16.13 B	Jul 18 1996
INSTANTANEOUS LOW FLOW			9.9	Jul 30	3.6	Dec 19 1989
ANNUAL RUNOFF (CFSM)	1.80		2.01		1.85
ANNUAL RUNOFF (INCHES)	24.40		27.30		25.20
10 PERCENT EXCEEDS	77		105		92
50 PERCENT EXCEEDS	33		36		32
90 PERCENT EXCEEDS	20		22		18

A - Aug. 19, Oct. 7, 1992.
B - From floodmark.