05540275 DATA: Discharge Tables, 2000

Station list Available data
ILLINOIS RIVER BASIN

05540275 SPRING BROOK AT 87TH STREET NEAR NAPERVILLE, IL

LOCATION.-- Lat 41°43'33", long 88°09'46", in SW1/4SW1/4 sec.36, T.38 N., R.9 E., Du Page County, Hydrologic Unit 07120004, on right bank at upstream side of bridge on 87th Street, 3.0 mi south of Naperville, and at mile 2.9.

DRAINAGE AREA.-- 9.90 mi².

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

DISCHARGE: October 1987 to current year.

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: October 1987 to current year.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 647.00 ft above sea level.

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

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	14	.88	.25	e2.5	e1.8	4.5	3.2	6.3	39	7.3	18	1.0
2	9.4	.71	.31	e2.5	e1.8	2.5	3.3	5.9	31	6.3	18	.91
3	14	.73	.56	e3.0	e1.8	1.8	3.4	5.0	19	35	13	.69
4	22	.76	.19	e3.7	e1.8	1.6	3.3	4.7	15	32	11	.64
5	11	.91	29	e3.3	e1.8	1.3	3.6	4.4	16	21	12	.65

6	8.1	.83	20	e3.0	e1.7	1.2	3.6	4.7	9.9	14	17	.56
7	6.2	.74	11	e3.0	e1.6	1.1	4.5	5.3	6.1	11	27	.57
8	4.7	.62	8.6	e2.8	e1.5	1.2	6.8	5.2	4.0	7.9	16	.69
9	3.8	.71	7.1	e2.5	e1.6	.99	6.5	30	2.4	6.6	16	.76
10	3.3	.61	5.4	e4.5	e1.9	.62	5.4	41	.90	54	11	1.1

11	2.6	.76	e3.5	e5.0	e2.7	.50	5.6	34	2.7	48	7.2	3.4
12	2.1	.79	e3.2	e2.9	e2.5	.41	5.1	43	38	34	5.6	38
13	2.1	.61	e3.0	e2.7	e2.3	.41	5.5	88	53	26	4.3	11
14	1.9	.52	e2.9	e1.9	e2.1	.34	5.2	44	70	19	3.7	14
15	1.6	.52	e3.0	e1.8	e2.0	.78	5.0	27	64	18	2.9	14

16	1.8	.57	e3.3	e1.8	e2.0	2.6	7.9	22	44	16	2.3	8.9
17	1.9	.60	e3.0	e1.8	e2.1	1.2	39	18	35	15	9.8	6.4
18	1.4	.63	e3.0	e1.7	e2.2	.56	14	23	26	14	12	3.6
19	1.2	.45	e3.0	e1.7	e2.3	1.2	23	37	18	12	9.0	2.5
20	1.2	.21	e3.1	e1.6	e2.5	5.2	114	27	16	11	7.0	2.6

21	1.3	.17	e2.9	e1.6	e2.0	6.8	144	18	15	9.4	3.9	3.1
22	1.1	.25	e2.8	e1.6	e8.1	5.4	80	21	10	7.6	3.1	6.9
23	.85	.96	e2.7	e1.6	e14	4.0	44	16	8.3	6.9	2.7	21
24	.81	.67	e2.7	e1.6	26	3.5	35	11	19	5.6	1.9	29
25	.84	.42	e2.4	e1.6	26	3.0	24	6.3	65	5.5	1.5	18

26	.70	.41	e2.4	e1.7	18	2.8	15	2.3	40	4.5	1.3	12
27	.33	.41	e2.4	e1.7	14	3.6	13	2.2	27	4.1	1.3	8.7
28	.39	.31	e2.5	e1.7	10	4.4	11	4.8	19	4.1	1.1	6.8
29	.41	.32	e2.6	e1.8	6.9	3.8	9.5	2.6	15	3.7	1.0	4.9
30	.38	.26	e2.6	e1.9	---	3.0	6.3	1.8	9.0	8.9	1.9	3.8

31	.51	---	e2.5	e1.9	---	2.7	---	15	---	10	1.3	---

TOTAL	121.92	17.34	141.91	72.4	165.0	73.01	649.7	576.5	737.30	478.4	243.8	226.17
MEAN	3.93	.58	4.58	2.34	5.69	2.36	21.7	18.6	24.6	15.4	7.86	7.54
MAX	22	.96	29	5.0	26	6.8	144	88	70	54	27	38
MIN	.33	.17	.19	1.6	1.5	.34	3.2	1.8	.90	3.7	1.0	.56
CFSM	.40	.06	.46	.24	.57	.24	2.19	1.88	2.48	1.56	.79	.76
IN.	.46	.07	.53	.27	.62	.27	2.44	2.17	2.77	1.80	.92	.85

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2000, BY WATER YEAR (WY)
MEAN	4.78	10.2	8.74	11.8	11.6	13.0	17.2	15.3	13.0	12.1	6.46	5.11
MAX	18.2	20.1	22.6	30.7	44.3	26.1	34.0	46.3	31.3	78.1	27.6	13.6
(WY)	1999	1993	1988	1993	1997	1990	1993	1990	1993	1996	1998	1989
MIN	.70	.58	.69	2.34	3.22	2.36	4.03	1.57	.78	.39	.22	.36
(WY)	1993	2000	1990	2000	1996	2000	1989	1989	1988	1988	1991	1988

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1988 - 2000
ANNUAL TOTAL	4258.23		3503.45
ANNUAL MEAN	11.7		9.57		10.8
HIGHEST ANNUAL MEAN					15.7	1993
LOWEST ANNUAL MEAN					6.40	1994
HIGHEST DAILY MEAN	160	Jan 23	144	Apr 21	1370	Jul 18 1996
LOWEST DAILY MEAN	.17	Nov 21	.17	Nov 21	.00	Oct 11 1988
ANNUAL SEVEN-DAY MINIMUM	.31	Nov 28	.31	Nov 28	.05	Oct 9 1988
INSTANTANEOUS PEAK FLOW			178	Apr 20	1750	Jul 18 1996
INSTANTANEOUS PEAK STAGE			6.02	Apr 20	10.77	Jul 18 1996
INSTANTANEOUS LOW FLOW			.00	Dec 4
ANNUAL RUNOFF (CFSM)	1.18		.97		1.09
ANNUAL RUNOFF (INCHES)	16.00		13.16		14.77
10 PERCENT EXCEEDS	30		26		27
50 PERCENT EXCEEDS	5.8		3.4		5.2
90 PERCENT EXCEEDS	.61		.65		.73