05540160 DATA: Discharge Tables, 2001

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.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1989 to current year.

STAGE: Water years 1994-2001.

PARTIAL RECORD: Annual maximum, water years 1961-76.

GAGE.-- Water-stage recorder, phone telemeter, 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.-- Diurnal fluctuation at low flow caused by sewage-treatment plants upstream from station.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 936 ft³/s, July 18, 1996, gage height, 16.13 ft, from floodmark; minimum discharge, 3.6 ft³/s, Dec. 19, 1989.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	26	20	30	28	88	53	34	36	92	22	23	108
2	24	24	29	27	64	48	31	34	98	21	40	67
3	27	21	29	27	52	44	29	31	76	29	29	43
4	155	21	29	28	47	41	28	30	53	24	25	37
5	87	22	27	28	43	38	34	29	125	22	23	31

6	60	39	27	29	42	36	145	30	129	21	23	46
7	42	118	26	30	40	34	121	36	81	25	23	80
8	35	61	26	29	87	32	79	32	58	24	22	48
9	32	183	27	30	409	31	65	29	47	24	24	53
10	29	177	26	30	337	31	53	32	42	23	29	44

11	27	98	28	29	165	34	55	74	38	21	24	36
12	26	59	28	29	100	42	73	59	71	21	22	30
13	26	63	26	31	75	42	54	43	45	21	37	27
14	25	50	28	46	90	38	47	37	37	20	25	25
15	24	41	27	67	93	64	73	34	34	19	23	24

16	23	36	e27	66	77	103	65	34	31	21	53	24
17	22	32	e27	57	60	104	51	30	28	20	36	23
18	22	31	28	51	50	95	45	27	33	23	33	25
19	23	29	29	45	47	81	40	26	30	22	34	261
20	24	29	28	42	43	72	59	25	29	22	28	265

21	25	26	29	39	38	61	103	32	32	40	25	305
22	23	25	28	36	39	52	85	31	30	84	27	176
23	24	25	28	34	35	47	112	29	28	102	39	190
24	24	25	27	33	120	43	130	27	27	53	43	209
25	22	27	26	31	244	38	89	40	26	87	126	97

26	25	41	26	31	142	36	67	78	25	47	117	62
27	22	37	26	32	88	34	53	112	23	34	63	49
28	22	33	26	31	62	33	44	90	23	31	41	41
29	21	33	26	52	---	31	42	59	24	27	32	38
30	21	30	27	146	---	30	38	43	23	25	32	36

31	20	---	28	127	---	31	---	48	---	24	106	---

TOTAL	1008	1456	849	1341	2777	1499	1944	1297	1438	999	1227	2500
MEAN	32.5	48.5	27.4	43.3	99.2	48.4	64.8	41.8	47.9	32.2	39.6	83.3
MAX	155	183	30	146	409	104	145	112	129	102	126	305
MIN	20	20	26	27	35	30	28	25	23	19	22	23
CFSM	1.22	1.82	1.03	1.63	3.73	1.82	2.44	1.57	1.80	1.21	1.49	3.13
IN.	1.41	2.04	1.19	1.88	3.88	2.10	2.72	1.81	2.01	1.40	1.72	3.50

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1990 - 2001, BY WATER YEAR (WY)
MEAN	35.1	49.4	37.7	49.5	57.0	56.3	74.3	66.4	57.4	38.4	39.2	37.1
MAX	70.6	92.8	56.2	100	138	87.8	139	121	97.2	96.5	63.4	83.3
(WY)	1999	1991	1991	1993	1997	1993	1993	1990	1993	1996	1998	2001
MIN	18.5	20.5	16.3	24.6	28.9	29.9	33.3	22.2	21.5	19.9	18.4	19.7
(WY)	1990	2000	1990	2000	1996	1996	1990	1992	1992	1991	1991	1995

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1990 - 2001
ANNUAL TOTAL	16356		18335
ANNUAL MEAN	44.7		50.2		49.7
HIGHEST ANNUAL MEAN					64.1	1993
LOWEST ANNUAL MEAN					38.5	1994
HIGHEST DAILY MEAN	478	Apr 21	409	Feb 9	853	Jul 18 1996
LOWEST DAILY MEAN	19	A	19	Jul 15	11	B
ANNUAL SEVEN-DAY MINIMUM	20	Sep 2	20	Jul 11	12	Aug 14 1992
MAXIMUM PEAK FLOW			460	Feb 9	936	Jul 18 1996
MAXIMUM PEAK STAGE			13.68	Feb 9	16.13 C	Jul 18 1996
INSTANTANEOUS LOW FLOW			10	Jul 13	3.6	Dec 19 1989
ANNUAL RUNOFF (CFSM)	1.68		1.89		1.87
ANNUAL RUNOFF (INCHES)	22.87		25.64		25.39
10 PERCENT EXCEEDS	82		97		94
50 PERCENT EXCEEDS	29		33		32
90 PERCENT EXCEEDS	22		23		19

	A - Aug. 30, Sept. 3.
	B - Aug. 19, Oct. 7, 1992.
	C - 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 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	26	20	30	28	88	53	34	36	92	22	23	108
2	24	24	29	27	64	48	31	34	98	21	40	67
3	27	21	29	27	52	44	29	31	76	29	29	43
4	155	21	29	28	47	41	28	30	53	24	25	37
5	87	22	27	28	43	38	34	29	125	22	23	31

6	60	39	27	29	42	36	145	30	129	21	23	46
7	42	118	26	30	40	34	121	36	81	25	23	80
8	35	61	26	29	87	32	79	32	58	24	22	48
9	32	183	27	30	409	31	65	29	47	24	24	53
10	29	177	26	30	337	31	53	32	42	23	29	44

11	27	98	28	29	165	34	55	74	38	21	24	36
12	26	59	28	29	100	42	73	59	71	21	22	30
13	26	63	26	31	75	42	54	43	45	21	37	27
14	25	50	28	46	90	38	47	37	37	20	25	25
15	24	41	27	67	93	64	73	34	34	19	23	24

16	23	36	e27	66	77	103	65	34	31	21	53	24
17	22	32	e27	57	60	104	51	30	28	20	36	23
18	22	31	28	51	50	95	45	27	33	23	33	25
19	23	29	29	45	47	81	40	26	30	22	34	261
20	24	29	28	42	43	72	59	25	29	22	28	265

21	25	26	29	39	38	61	103	32	32	40	25	305
22	23	25	28	36	39	52	85	31	30	84	27	176
23	24	25	28	34	35	47	112	29	28	102	39	190
24	24	25	27	33	120	43	130	27	27	53	43	209
25	22	27	26	31	244	38	89	40	26	87	126	97

26	25	41	26	31	142	36	67	78	25	47	117	62
27	22	37	26	32	88	34	53	112	23	34	63	49
28	22	33	26	31	62	33	44	90	23	31	41	41
29	21	33	26	52	---	31	42	59	24	27	32	38
30	21	30	27	146	---	30	38	43	23	25	32	36

31	20	---	28	127	---	31	---	48	---	24	106	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	26	20	30	28	88	53	34	36	92	22	23	108
2	24	24	29	27	64	48	31	34	98	21	40	67
3	27	21	29	27	52	44	29	31	76	29	29	43
4	155	21	29	28	47	41	28	30	53	24	25	37
5	87	22	27	28	43	38	34	29	125	22	23	31

6	60	39	27	29	42	36	145	30	129	21	23	46
7	42	118	26	30	40	34	121	36	81	25	23	80
8	35	61	26	29	87	32	79	32	58	24	22	48
9	32	183	27	30	409	31	65	29	47	24	24	53
10	29	177	26	30	337	31	53	32	42	23	29	44

11	27	98	28	29	165	34	55	74	38	21	24	36
12	26	59	28	29	100	42	73	59	71	21	22	30
13	26	63	26	31	75	42	54	43	45	21	37	27
14	25	50	28	46	90	38	47	37	37	20	25	25
15	24	41	27	67	93	64	73	34	34	19	23	24

16	23	36	e27	66	77	103	65	34	31	21	53	24
17	22	32	e27	57	60	104	51	30	28	20	36	23
18	22	31	28	51	50	95	45	27	33	23	33	25
19	23	29	29	45	47	81	40	26	30	22	34	261
20	24	29	28	42	43	72	59	25	29	22	28	265

21	25	26	29	39	38	61	103	32	32	40	25	305
22	23	25	28	36	39	52	85	31	30	84	27	176
23	24	25	28	34	35	47	112	29	28	102	39	190
24	24	25	27	33	120	43	130	27	27	53	43	209
25	22	27	26	31	244	38	89	40	26	87	126	97

26	25	41	26	31	142	36	67	78	25	47	117	62
27	22	37	26	32	88	34	53	112	23	34	63	49
28	22	33	26	31	62	33	44	90	23	31	41	41
29	21	33	26	52	---	31	42	59	24	27	32	38
30	21	30	27	146	---	30	38	43	23	25	32	36

31	20	---	28	127	---	31	---	48	---	24	106	---

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	26	20	30	28	88	53	34	36	92	22	23	108
2	24	24	29	27	64	48	31	34	98	21	40	67
3	27	21	29	27	52	44	29	31	76	29	29	43
4	155	21	29	28	47	41	28	30	53	24	25	37
5	87	22	27	28	43	38	34	29	125	22	23	31

6	60	39	27	29	42	36	145	30	129	21	23	46
7	42	118	26	30	40	34	121	36	81	25	23	80
8	35	61	26	29	87	32	79	32	58	24	22	48
9	32	183	27	30	409	31	65	29	47	24	24	53
10	29	177	26	30	337	31	53	32	42	23	29	44

11	27	98	28	29	165	34	55	74	38	21	24	36
12	26	59	28	29	100	42	73	59	71	21	22	30
13	26	63	26	31	75	42	54	43	45	21	37	27
14	25	50	28	46	90	38	47	37	37	20	25	25
15	24	41	27	67	93	64	73	34	34	19	23	24

16	23	36	e27	66	77	103	65	34	31	21	53	24
17	22	32	e27	57	60	104	51	30	28	20	36	23
18	22	31	28	51	50	95	45	27	33	23	33	25
19	23	29	29	45	47	81	40	26	30	22	34	261
20	24	29	28	42	43	72	59	25	29	22	28	265

21	25	26	29	39	38	61	103	32	32	40	25	305
22	23	25	28	36	39	52	85	31	30	84	27	176
23	24	25	28	34	35	47	112	29	28	102	39	190
24	24	25	27	33	120	43	130	27	27	53	43	209
25	22	27	26	31	244	38	89	40	26	87	126	97

26	25	41	26	31	142	36	67	78	25	47	117	62
27	22	37	26	32	88	34	53	112	23	34	63	49
28	22	33	26	31	62	33	44	90	23	31	41	41
29	21	33	26	52	---	31	42	59	24	27	32	38
30	21	30	27	146	---	30	38	43	23	25	32	36

31	20	---	28	127	---	31	---	48	---	24	106	---