05540160 DATA: Discharge Tables, 1999

ILLINOIS RIVER BASIN

05540160 EAST BRANCH DU PAGE RIVER NEAR DOWNERS GROVE, IL

LOCATION.--Lat 41°49'54", long 88°02'51", in SE1/4SW1/4 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 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	34	41	46	28	74	53	29	85	60	86	24	20
2	38	38	37	28	103	51	29	66	151	64	24	19
3	56	27	34	e28	97	54	29	57	91	48	23	19
4	35	33	32	e28	81	53	32	49	57	46	23	19
5	72	35	31	29	66	32	29	45	46	38	22	18

6	73	32	76	30	59	48	31	43	43	34	22	18
7	53	31	151	28	54	47	28	53	42	31	26	18
8	51	32	89	28	50	43	36	45	35	29	25	18
9	23	34	61	30	47	45	181	38	32	58	24	18
10	27	218	52	29	44	47	125	36	31	47	23	18

11	28	157	46	29	59	50	90	44	60	37	23	17
12	27	91	45	28	79	50	68	270	75	33	30	20
13	26	71	42	27	58	53	48	184	218	29	29	22
14	25	55	39	27	48	52	40	109	297	28	26	21
15	25	47	38	28	46	58	60	69	149	27	24	20

16	25	44	37	30	42	79	234	55	91	28	24	18
17	164	36	36	47	39	123	173	123	67	34	23	18
18	457	26	36	80	38	114	118	118	53	32	23	18
19	270	32	35	56	36	76	85	76	45	32	37	19
20	116	32	34	46	34	62	68	53	40	31	31	20

21	79	32	34	54	32	54	62	69	38	37	27	18
22	58	32	33	332	31	47	112	223	59	42	25	18
23	50	31	32	450	30	42	451	170	56	36	30	18
24	43	29	32	431	30	39	304	128	63	37	38	18
25	39	31	31	238	25	37	170	88	40	34	37	17

26	28	31	31	140	33	34	115	61	36	31	32	18
27	43	29	31	121	79	26	150	49	104	29	25	26
28	71	29	32	128	70	30	304	43	75	27	23	111
29	48	29	32	95	---	32	194	38	54	27	22	108
30	56	54	30	77	---	28	122	35	44	26	21	64

31	48	---	30	72	---	30	---	34	---	25	20	---

TOTAL	2188	1439	1345	2822	1484	1589	3517	2556	2252	1143	806	794
MEAN	70.6	48.0	43.4	91.0	53.0	51.3	117	82.5	75.1	36.9	26.0	26.5
MAX	457	218	151	450	103	123	451	270	297	86	38	111
MIN	23	26	30	27	25	26	28	34	31	25	20	17
CFSM	2.65	1.80	1.63	3.42	1.99	1.93	4.41	3.10	2.82	1.39	.98	.99
IN.	3.06	2.01	1.88	3.95	2.08	2.22	4.92	3.57	3.15	1.60	1.13	1.11

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 1999, BY WATER YEAR (WY)
MEAN	36.2	52.4	39.2	52.6	54.6	59.7	74.9	69.6	57.7	37.7	39.7	31.3
MAX	70.6	92.8	56.2	100	138	87.8	139	121	97.2	96.5	63.4	49.6
(WY)	1999	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 1998 CALENDAR YEAR		FOR 1999 WATER YEAR		WATER YEARS 1990 - 1999
ANNUAL TOTAL	21895		21935
ANNUAL MEAN	60.0		60.1		50.4
HIGHEST ANNUAL MEAN					64.1	1993
LOWEST ANNUAL MEAN					38.5	1994
HIGHEST DAILY MEAN	499	May 8	457	Oct 18	853	Jul 18 1996
LOWEST DAILY MEAN	15	Mar 7	17	Sep 11,25	11	A
ANNUAL SEVEN-DAY MINIMUM	21	Jul 27	18	Sep 5	12	Aug 14 1992
INSTANTANEOUS PEAK FLOW			517	Jan 23	936	Jul 18 1996
INSTANTANEOUS PEAK STAGE			14.01	Jan 23	16.13 B	Jul 18 1996
INSTANTANEOUS LOW FLOW			12	Sep 23,25	3.6	Dec 19 1989
ANNUAL RUNOFF (CFSM)	2.26		2.26		1.89
ANNUAL RUNOFF (INCHES)	30.62		30.68		25.75
10 PERCENT EXCEEDS	117		118		95
50 PERCENT EXCEEDS	41		38		32
90 PERCENT EXCEEDS	25		23		18

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

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	34	41	46	28	74	53	29	85	60	86	24	20
2	38	38	37	28	103	51	29	66	151	64	24	19
3	56	27	34	e28	97	54	29	57	91	48	23	19
4	35	33	32	e28	81	53	32	49	57	46	23	19
5	72	35	31	29	66	32	29	45	46	38	22	18

6	73	32	76	30	59	48	31	43	43	34	22	18
7	53	31	151	28	54	47	28	53	42	31	26	18
8	51	32	89	28	50	43	36	45	35	29	25	18
9	23	34	61	30	47	45	181	38	32	58	24	18
10	27	218	52	29	44	47	125	36	31	47	23	18

11	28	157	46	29	59	50	90	44	60	37	23	17
12	27	91	45	28	79	50	68	270	75	33	30	20
13	26	71	42	27	58	53	48	184	218	29	29	22
14	25	55	39	27	48	52	40	109	297	28	26	21
15	25	47	38	28	46	58	60	69	149	27	24	20

16	25	44	37	30	42	79	234	55	91	28	24	18
17	164	36	36	47	39	123	173	123	67	34	23	18
18	457	26	36	80	38	114	118	118	53	32	23	18
19	270	32	35	56	36	76	85	76	45	32	37	19
20	116	32	34	46	34	62	68	53	40	31	31	20

21	79	32	34	54	32	54	62	69	38	37	27	18
22	58	32	33	332	31	47	112	223	59	42	25	18
23	50	31	32	450	30	42	451	170	56	36	30	18
24	43	29	32	431	30	39	304	128	63	37	38	18
25	39	31	31	238	25	37	170	88	40	34	37	17

26	28	31	31	140	33	34	115	61	36	31	32	18
27	43	29	31	121	79	26	150	49	104	29	25	26
28	71	29	32	128	70	30	304	43	75	27	23	111
29	48	29	32	95	---	32	194	38	54	27	22	108
30	56	54	30	77	---	28	122	35	44	26	21	64

31	48	---	30	72	---	30	---	34	---	25	20	---

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	34	41	46	28	74	53	29	85	60	86	24	20
2	38	38	37	28	103	51	29	66	151	64	24	19
3	56	27	34	e28	97	54	29	57	91	48	23	19
4	35	33	32	e28	81	53	32	49	57	46	23	19
5	72	35	31	29	66	32	29	45	46	38	22	18

6	73	32	76	30	59	48	31	43	43	34	22	18
7	53	31	151	28	54	47	28	53	42	31	26	18
8	51	32	89	28	50	43	36	45	35	29	25	18
9	23	34	61	30	47	45	181	38	32	58	24	18
10	27	218	52	29	44	47	125	36	31	47	23	18

11	28	157	46	29	59	50	90	44	60	37	23	17
12	27	91	45	28	79	50	68	270	75	33	30	20
13	26	71	42	27	58	53	48	184	218	29	29	22
14	25	55	39	27	48	52	40	109	297	28	26	21
15	25	47	38	28	46	58	60	69	149	27	24	20

16	25	44	37	30	42	79	234	55	91	28	24	18
17	164	36	36	47	39	123	173	123	67	34	23	18
18	457	26	36	80	38	114	118	118	53	32	23	18
19	270	32	35	56	36	76	85	76	45	32	37	19
20	116	32	34	46	34	62	68	53	40	31	31	20

21	79	32	34	54	32	54	62	69	38	37	27	18
22	58	32	33	332	31	47	112	223	59	42	25	18
23	50	31	32	450	30	42	451	170	56	36	30	18
24	43	29	32	431	30	39	304	128	63	37	38	18
25	39	31	31	238	25	37	170	88	40	34	37	17

26	28	31	31	140	33	34	115	61	36	31	32	18
27	43	29	31	121	79	26	150	49	104	29	25	26
28	71	29	32	128	70	30	304	43	75	27	23	111
29	48	29	32	95	---	32	194	38	54	27	22	108
30	56	54	30	77	---	28	122	35	44	26	21	64

31	48	---	30	72	---	30	---	34	---	25	20	---

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	34	41	46	28	74	53	29	85	60	86	24	20
2	38	38	37	28	103	51	29	66	151	64	24	19
3	56	27	34	e28	97	54	29	57	91	48	23	19
4	35	33	32	e28	81	53	32	49	57	46	23	19
5	72	35	31	29	66	32	29	45	46	38	22	18

6	73	32	76	30	59	48	31	43	43	34	22	18
7	53	31	151	28	54	47	28	53	42	31	26	18
8	51	32	89	28	50	43	36	45	35	29	25	18
9	23	34	61	30	47	45	181	38	32	58	24	18
10	27	218	52	29	44	47	125	36	31	47	23	18

11	28	157	46	29	59	50	90	44	60	37	23	17
12	27	91	45	28	79	50	68	270	75	33	30	20
13	26	71	42	27	58	53	48	184	218	29	29	22
14	25	55	39	27	48	52	40	109	297	28	26	21
15	25	47	38	28	46	58	60	69	149	27	24	20

16	25	44	37	30	42	79	234	55	91	28	24	18
17	164	36	36	47	39	123	173	123	67	34	23	18
18	457	26	36	80	38	114	118	118	53	32	23	18
19	270	32	35	56	36	76	85	76	45	32	37	19
20	116	32	34	46	34	62	68	53	40	31	31	20

21	79	32	34	54	32	54	62	69	38	37	27	18
22	58	32	33	332	31	47	112	223	59	42	25	18
23	50	31	32	450	30	42	451	170	56	36	30	18
24	43	29	32	431	30	39	304	128	63	37	38	18
25	39	31	31	238	25	37	170	88	40	34	37	17

26	28	31	31	140	33	34	115	61	36	31	32	18
27	43	29	31	121	79	26	150	49	104	29	25	26
28	71	29	32	128	70	30	304	43	75	27	23	111
29	48	29	32	95	---	32	194	38	54	27	22	108
30	56	54	30	77	---	28	122	35	44	26	21	64

31	48	---	30	72	---	30	---	34	---	25	20	---