05540130 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05540130 WEST BRANCH DU PAGE RIVER NEAR NAPERVILLE, IL

LOCATION.-- Lat 41°43'13", long 88°07'55", in SW1/4NE1/4 sec.6, T.37 N., R.10 E., Will County, Hydrologic Unit 07120004, on downstream side of bridge on Washington Street, 3.5 mi southeast of Naperville, and at mile 29.3.

DRAINAGE AREA.-- 123 mi².

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

DISCHARGE: October 1988 to current year.

STAGE: Water years 1994-2001.

PRECIPITATION: May 1989 to current year.

GAGE.-- Water-stage recorder, phone telemeter, rain gage, and crest-stage gage. Datum of gage is 630.00 ft above sea level. Water years 1989 to 1995 datum incorrectly published as 625.28 ft above sea level.

REMARKS.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,620 ft³/s, July 18, 1996, gage height, 14.31 ft; minimum discharge, 5.2 ft³/s, July 20, 2000.
PRECIPITATION: Maximum daily total, 5.34 in., August 4, 1998.

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	56	41	80	e57	372	209	98	108	273	53	44	310
2	51	51	72	e56	258	180	94	97	379	48	48	163
3	61	53	67	e57	215	159	89	88	314	64	61	107
4	378	45	65	e58	167	142	83	81	205	54	44	85
5	323	43	63	e59	150	129	96	74	431	48	39	71

6	210	91	e61	e61	141	116	299	74	660	44	34	100
7	141	506	e58	e62	133	109	338	105	407	51	35	199
8	99	347	e59	e60	252	102	226	113	295	59	36	129
9	82	574	e60	e62	1500	97	198	88	235	49	38	119
10	75	828	55	e61	1640	90	184	86	192	47	55	126

11	66	494	e58	e60	e924	100	171	492	165	44	59	91
12	57	281	e58	e62	e444	120	275	484	215	39	38	71
13	53	244	e54	e90	343	155	214	229	181	35	35	56
14	51	210	e60	e130	353	136	171	161	141	34	42	48
15	49	164	e56	e170	424	175	253	142	137	36	36	39

16	50	141	e62	e160	309	377	226	120	129	35	126	38
17	53	123	e60	e145	e220	355	178	105	103	37	e90	41
18	50	107	e58	e130	e180	340	151	101	102	48	e76	49
19	49	100	e61	e115	e160	284	143	76	121	45	e78	985
20	49	91	e62	e91	152	237	196	68	92	42	e65	1500

21	51	89	e59	e86	138	205	355	96	97	76	e51	1330
22	51	e70	e58	e75	129	181	249	120	97	332	64	1060
23	53	e66	e58	e70	119	160	311	97	85	398	111	805
24	61	e67	e56	e70	341	140	396	83	77	237	108	872
25	58	e80	e55	e69	963	124	263	132	73	344	270	525

26	52	e130	e54	e70	616	111	202	257	67	178	374	328
27	49	e106	e54	e72	346	105	166	342	61	107	210	251
28	44	95	e54	86	249	100	140	243	58	78	131	187
29	41	94	e54	142	---	97	127	177	57	66	94	150
30	41	91	e56	520	---	95	117	131	53	57	81	119

31	44	---	e58	526	---	97	---	131	---	52	345	---

TOTAL	2548	5422	1845	3532	11238	5027	6009	4701	5502	2837	2918	9954
MEAN	82.2	181	59.5	114	401	162	200	152	183	91.5	94.1	332
MAX	378	828	80	526	1640	377	396	492	660	398	374	1500
MIN	41	41	54	56	119	90	83	68	53	34	34	38
CFSM	.67	1.47	.48	.93	3.26	1.32	1.63	1.23	1.49	.74	.77	2.70
IN.	.77	1.64	.56	1.07	3.40	1.52	1.82	1.42	1.66	.86	.88	3.01

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 2001, BY WATER YEAR (WY)
MEAN	91.4	150	109	151	189	184	247	215	179	123	115	115
MAX	245	290	187	315	518	316	449	449	368	456	174	332
(WY)	1999	1996	1991	1999	1997	1990	1993	1990	1996	1996	1998	2001
MIN	30.5	38.3	33.5	48.4	54.8	73.0	69.5	62.6	32.7	39.5	35.7	40.9
(WY)	1990	2000	1990	2000	1989	2000	1989	1989	1992	1991	1991	1991

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1989 - 2001
ANNUAL TOTAL	46099		61533
ANNUAL MEAN	126		169		155
HIGHEST ANNUAL MEAN					200	1993
LOWEST ANNUAL MEAN					110	1989
HIGHEST DAILY MEAN	1880	Apr 21	1640	Feb 10	4960	Jul 18 1996
LOWEST DAILY MEAN	29	Sep 3, 8, 9	34	Jul 14, Aug 6	16	Oct 13 1989
ANNUAL SEVEN-DAY MINIMUM	30	Sep 3	37	Jul 11	19	Jun 3 1994
MAXIMUM PEAK FLOW			1910	Feb 10	6620	Jul 18 1996
MAXIMUM PEAK STAGE			9.22	Feb 10	14.31	Jul 18 1996
INSTANTANEOUS LOW FLOW			29	A	5.2	Jul 20 2000
ANNUAL RUNOFF (CFSM)	1.02		1.37		1.26
ANNUAL RUNOFF (INCHES)	13.94		18.61		17.14
10 PERCENT EXCEEDS	264		346		318
50 PERCENT EXCEEDS	71		97		91
90 PERCENT EXCEEDS	41		48		40

A - July 14, 15, Aug. 9.