USGS CD-ROM: Current Year Discharge

05587900 CAHOKIA CREEK AT EDWARDSVILLE, IL

LOCATION.--Lat 38°49'28", long 89°58'29", in NW¼SE¼ sec.3, T.4 N., R.8 W., Madison County, Hydrologic Unit 07140101, on right bank at upstream side of bridge on State Highway 143 in Edwardsville, and at mile 9.4.

DRAINAGE AREA.--212 mi².

PERIOD OF RECORD.--August 1969 to current year.

REVISED RECORDS.--WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 425.62 ft above sea level. Apr. 8, 1983, to July 2, 1985, nonrecording gage at same site and datum.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Gage-height telemeter at station.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	3.8	5.4	31	9.0	37	103	308	247	37	122	42	51
2	3.0	6.6	11	12	35	80	198	393	33	62	26	101
3	e2.5	4.8	8.1	11	32	71	486	332	29	45	21	34
4	e2.3	5.0	7.0	12	31	66	956	262	227	47	85	20
5	e2.1	8.1	5.6	40	30	65	314	158	469	42	914	15

6	e2.0	18	4.2	80	29	64	207	117	158	63	413	12
7	e1.9	14	3.7	132	27	58	167	218	85	306	173	11
8	e1.9	8.7	3.5	1200	26	1160	140	171	281	137	288	9.4
9	e1.8	4.9	3.8	808	26	1550	114	113	867	49	103	8.2
10	e1.8	e3.5	5.8	232	27	568	98	89	375	36	55	7.8

11	e1.7	e3.0	12	134	97	254	86	75	953	129	52	7.6
12	e1.7	e2.5	9.4	98	193	169	77	64	1740	45	73	7.8
13	e3.5	e2.3	7.0	77	123	156	102	62	830	30	32	7.9
14	e2.8	e3.5	5.6	63	74	148	151	56	1190	25	26	8.2
15	e2.5	4.7	4.6	88	58	116	817	47	1480	23	24	8.6

16	e2.2	4.4	4.6	78	84	101	873	43	882	22	33	9.9
17	e1.9	4.3	4.2	61	633	361	323	38	943	20	44	42
18	e1.7	4.5	3.8	51	1140	2140	186	35	231	18	407	14
19	e1.6	5.0	3.6	43	361	883	142	32	169	19	156	11
20	e1.5	4.6	3.5	46	231	3910	116	30	191	23	60	9.0

21	1.4	4.8	3.7	42	187	3140	102	43	2800	16	33	8.7
22	1.5	5.1	7.7	41	136	614	90	1100	1030	25	25	8.3
23	1.5	6.6	14	40	110	295	84	944	846	55	20	7.8
24	2.5	4.4	119	39	91	219	74	257	240	25	17	7.6
25	2.3	4.1	240	37	78	181	69	189	138	19	15	48

26	5.6	4.7	75	39	71	156	66	183	93	20	14	44
27	3.6	4.9	31	49	215	147	58	104	69	23	13	17
28	5.4	4.8	19	55	186	1640	66	75	54	19	12	12
29	3.6	6.6	15	55	---	596	291	59	149	16	12	9.4
30	3.1	46	12	48	---	258	462	50	262	435	12	8.2

31	2.9	---	8.5	40	---	247	---	43	---	127	12	---

TOTAL	77.6	209.8	686.9	3760.0	4368	19516	7223	5629	16851	2043	3212	566.4
MEAN	2.50	6.99	22.2	121	156	630	241	182	562	65.9	104	18.9
MAX	5.6	46	240	1200	1140	3910	956	1100	2800	435	914	101
MIN	1.4	2.3	3.5	9.0	26	58	58	30	29	16	12	7.6
CFSM	.01	.03	.10	.57	.74	2.97	1.14	.86	2.65	.31	.49	.09
IN.	.01	.04	.12	.66	.77	3.42	1.27	.99	2.96	.36	.56	.10

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1969 - 1998, BY WATER YEAR (WY)
MEAN	42.1	104	183	165	213	312	344	207	130	46.2	27.2	42.9
MAX	366	649	915	834	782	1120	1251	1006	562	206	104	486
(WY)	1970	1986	1983	1974	1985	1978	1994	1990	1998	1981	1998	1993
MIN	.82	1.05	1.08	1.21	19.7	14.1	38.2	15.0	2.04	1.18	1.05	.15
(WY)	1996	1981	1990	1977	1980	1981	1976	1988	1988	1988	1991	1988

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1969 - 1998
ANNUAL TOTAL	29842.6		64142.7
ANNUAL MEAN	81.8		176		151
HIGHEST ANNUAL MEAN					297	1985
LOWEST ANNUAL MEAN					32.4	1980
HIGHEST DAILY MEAN	3420	Feb 27	3910	Mar 20	7680	Apr 12 1979
LOWEST DAILY MEAN	1.4 A	Oct 21	1.4 A	Oct 21	.00	B
ANNUAL SEVEN-DAY MINIMUM	1.6	Oct 17	1.6	Oct 17	.00	Aug 29 1987
INSTANTANEOUS PEAK FLOW			4550	Mar 20	8200	Apr 12 1979
INSTANTANEOUS PEAK STAGE			16.65	Mar 20	24.74	Apr 12 1979
ANNUAL RUNOFF (CFSM)	.39		.83		.71
ANNUAL RUNOFF (INCHES)	5.24		11.26		9.66
10 PERCENT EXCEEDS	164		409		276
50 PERCENT EXCEEDS	16		43		26
90 PERCENT EXCEEDS	3.0		3.7		2.0

A - May have been less during periods of estimated discharge in Oct.
B - Many days in 1987-88, 1991.