05540091 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05540091 SPRING BROOK AT FOREST PRESERVE NEAR WARRENVILLE, IL

LOCATION.-- Lat 41°50'07", long 88°10'58", in SW1/4SW1/4 sec.26, T.39 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank on upstream side of footbridge in Roy C. Blackwell Forest Preserve, 0.7 mi upstream from the confluence with the West Branch Du Page River and 1 mi northwest of Warrenville.

DRAINAGE AREA.-- 6.83 mi².

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

DISCHARGE: October 1991 to current year.

STAGE: Water years 1994-2001.

GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 690.15 ft above sea level.

REMARKS.-- Effluent from sewage-treatment plant 3 mi upstream.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 393 ft³/s, July 18, 1996, gage height, 12.60 ft; no flow, Nov. 25, 1999.

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	9.0	7.1	8.9	7.5	23	24	15	15	30	9.0	7.0	12
2	8.2	8.4	8.5	7.9	20	22	15	15	28	7.6	13	8.1
3	9.4	8.7	8.5	7.8	17	20	15	14	19	7.0	12	8.0
4	39	7.4	8.6	7.7	16	19	14	13	16	8.0	8.0	9.0
5	20	7.4	8.4	7.9	15	18	15	12	52	9.0	6.9	7.3

6	17	9.7	8.1	8.0	14	16	41	11	35	6.8	7.1	8.4
7	13	45	e8.0	8.2	14	15	28	15	28	8.6	6.8	27
8	11	18	e8.0	8.4	21	15	24	15	25	9.2	6.8	13
9	11	64	7.9	8.0	143	14	24	12	21	e7.0	5.0	14
10	11	36	7.9	7.9	48	14	21	e10	19	e6.2	12	15

11	10	21	8.9	8.2	31	15	21	e21	18	e5.4	7.5	10
12	8.8	17	8.3	8.0	29	17	30	e19	29	e6.5	4.6	8.7
13	9.9	18	7.9	8.3	27	19	22	e17	22	5.1	6.7	8.7
14	9.7	16	7.8	12	34	16	20	e15	17	6.8	7.5	7.6
15	9.4	13	7.7	20	32	25	28	14	16	6.4	6.0	6.1

16	9.7	12	e7.8	21	26	37	25	12	15	5.5	18	5.2
17	9.6	11	e7.8	18	22	33	23	10	13	6.1	13	7.9
18	9.4	9.9	e7.9	16	22	30	21	9.7	15	6.0	9.2	8.2
19	9.5	9.5	7.9	e15	21	28	19	7.9	15	7.0	11	89
20	9.2	9.7	7.6	e13	19	26	27	8.5	13	7.5	8.8	29

21	8.3	9.0	7.4	13	18	24	32	13	12	7.8	8.0	45
22	9.0	8.7	7.4	12	16	23	28	13	12	34	8.2	25
23	8.4	8.3	7.2	12	16	20	38	11	12	24	9.2	51
24	7.9	7.6	7.5	11	53	18	34	11	11	14	8.4	43
25	9.4	7.8	6.9	11	61	17	27	20	10	22	17	26

26	8.9	14	7.1	10	32	16	24	29	8.1	17	20	21
27	8.9	12	7.4	10	27	15	21	31	8.3	10	12	19
28	8.1	9.8	7.5	10	26	15	19	19	8.2	8.5	9.5	18
29	7.8	9.9	7.5	13	---	15	19	15	8.1	9.4	8.9	16
30	7.9	9.7	7.4	43	---	14	17	13	7.5	8.8	7.9	13

31	7.5	---	7.5	31	---	14	---	14	---	6.6	20	---

TOTAL	335.9	445.6	243.2	394.8	843	614	707	455.1	543.2	302.8	306.0	579.2
MEAN	10.8	14.9	7.85	12.7	30.1	19.8	23.6	14.7	18.1	9.77	9.87	19.3
MAX	39	64	8.9	43	143	37	41	31	52	34	20	89
MIN	7.5	7.1	6.9	7.5	14	14	14	7.9	7.5	5.1	4.6	5.2
CFSM	1.59	2.17	1.15	1.86	4.41	2.90	3.45	2.15	2.65	1.43	1.45	2.83
IN.	1.83	2.43	1.32	2.15	4.59	3.34	3.85	2.48	2.96	1.65	1.67	3.15

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1992 - 2001, BY WATER YEAR (WY)
MEAN	11.5	14.2	12.0	16.4	17.0	18.0	23.3	17.4	18.4	12.3	11.8	11.6
MAX	24.8	20.9	17.9	29.5	35.4	28.5	34.4	26.7	30.2	29.6	17.4	19.3
(WY)	1999	1995	1993	1993	1997	1998	1993	1996	1993	1996	1997	2001
MIN	7.35	6.49	7.72	8.92	7.37	10.1	8.35	6.98	7.41	8.44	7.33	6.60
(WY)	1995	1994	1994	1994	1996	2000	1994	1994	1992	1995	1999	1995

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1992 - 2001
ANNUAL TOTAL	5042.3		5769.8
ANNUAL MEAN	13.8		15.8		15.3
HIGHEST ANNUAL MEAN					18.8	1993
LOWEST ANNUAL MEAN					11.3	1994
HIGHEST DAILY MEAN	162	Apr 20	143	Feb 9	309	Jul 18 1996
LOWEST DAILY MEAN	4.2	Sep 2	4.6	Aug 12	3.8	Nov 25 1999
ANNUAL SEVEN-DAY MINIMUM	5.5	Aug 28	6.0	Jul 11	4.6	Nov 5 1993
MAXIMUM PEAK FLOW			177	Feb 9	393	Jul 18 1996
MAXIMUM PEAK STAGE			10.43	Feb 9	12.60	Jul 18 1996
INSTANTANEOUS LOW FLOW			2.4	Aug 12	.00	Nov 25 1999
ANNUAL RUNOFF (CFSM)	2.02		2.31		2.24
ANNUAL RUNOFF (INCHES)	27.46		31.43		30.42
10 PERCENT EXCEEDS	22		28		28
50 PERCENT EXCEEDS	10		12		11
90 PERCENT EXCEEDS	7.1		7.5		6.5