USGS CD-ROM: Current Year Discharge

05526000 IROQUOIS RIVER NEAR CHEBANSE, IL

LOCATION.--Lat 41°00'32", long 87°49'27", in SE¼SW¼ sec.10, T.29 N., R.13 W., Kankakee County, Hydrologic Unit 07120002, on right bank at upstream side of bridge on county highway, 3.1 mi downstream from Beaver Creek, 4.5 mi east of Chebanse, and at mile 6.5.

DRAINAGE AREA.--2,091 mi².

PERIOD OF RECORD.--April 1923 to current year.

REVISED RECORDS.--WSP 1308: 1924-28(M), 1930(M), 1936(M), 1938(M), 1942(M), 1947(M). WDR IL-75-1: Drainage area.

GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 595.99 ft above sea level. Prior to June 16,1976, nonrecording gage, and June 17, 1976 to Aug. 13, 1979 water-stage recorder at site 600 ft upstream at datum 2.00 ft higher. Aug. 14 to Oct. 24, 1979, nonrecording gage at present site at datum 2.00 ft higher.

REMARKS.--Records good except those for Oct. 1 and Mar. 22-24, which are fair. Gage-height telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in spring of 1913 reached a stage of 21.6 ft, present datum, discharge about 34,000 ft³/s.

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	119	211	478	570	2050	1560	7990	5600	1220	4480	479	138
2	118	201	576	660	2100	1480	6930	6780	1140	4670	410	133
3	109	192	585	579	2050	1400	5990	6610	1050	4290	366	132
4	108	181	531	815	1900	1330	5110	7440	978	4000	363	121
5	109	176	464	1980	1790	1250	4400	9320	913	5140	462	120

6	107	177	408	4300	1660	1180	3850	11200	879	5570	517	116
7	102	181	374	5750	1500	1110	3430	14000	833	5600	974	108
8	101	184	342	7390	1370	1260	3360	17900	782	8490	2160	111
9	100	180	316	9560	1270	3450	4080	19000	864	11500	2460	117
10	91	174	306	9860	1180	7190	4800	19600	1340	12200	2240	118

11	94	168	307	9370	1260	8490	5390	18300	5400	10800	1820	116
12	100	167	307	8340	1900	8480	4980	15600	11200	8030	1460	113
13	100	157	304	6580	2200	7800	4240	12400	12100	4740	1090	106
14	95	149	337	4830	2320	6620	4220	9140	12000	2850	805	105
15	96	157	359	3990	2250	5710	4700	6390	11000	1930	602	99

16	96	157	341	3390	2060	5250	4990	4780	9910	1440	493	92
17	100	159	316	2860	2000	6200	5420	3790	9130	1160	417	91
18	105	158	323	2380	2440	12900	5140	3070	8680	978	389	90
19	108	155	324	1950	2980	16100	4460	2540	8580	860	352	90
20	106	161	337	1630	3310	17300	3700	2270	8310	757	303	95

21	105	158	346	1430	3080	18400	3590	2810	7580	690	265	88
22	101	171	354	1310	2710	18800	3700	2610	6220	1070	237	87
23	102	175	369	1210	2410	17600	3670	2180	4620	1840	216	92
24	97	178	399	1130	2180	15700	3420	2180	3680	2430	198	91
25	90	192	612	1080	1980	13500	3130	2420	3130	2480	183	89

26	93	185	854	1020	1800	11100	2890	2440	2490	2030	176	92
27	115	186	1070	980	1720	8460	2660	2050	1990	1610	167	82
28	144	211	1130	975	1640	6770	2440	1730	1630	1230	162	79
29	148	276	1020	1120	---	7350	2360	1500	1420	922	161	77
30	180	340	892	1470	---	8310	3910	1380	2450	718	153	79

31	208	---	749	1840	---	8500	---	1290	---	572	146	---

TOTAL	3447	5517	15430	100349	57110	250550	128950	218320	141519	115077	20226	3067
MEAN	111	184	498	3237	2040	8082	4298	7043	4717	3712	652	102
MAX	208	340	1130	9860	3310	18800	7990	19600	12100	12200	2460	138
MIN	90	149	304	570	1180	1110	2360	1290	782	572	146	77
CFSM	.05	.09	.24	1.55	.98	3.87	2.06	3.37	2.26	1.78	.31	.05
IN.	.06	.10	.27	1.79	1.02	4.46	2.29	3.88	2.52	2.05	.36	.05

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1923 - 1998, BY WATER YEAR (WY)
MEAN	709	975	1560	1922	2517	3166	3237	2711	2014	1244	465	576
MAX	8019	5850	8203	9079	7425	11210	8396	10910	7934	7004	2497	7372
(WY)	1994	1986	1928	1950	1982	1982	1950	1943	1958	1993	1977	1993
MIN	25.5	37.2	40.7	26.1	82.3	200	574	169	94.6	33.0	33.7	26.3
(WY)	1957	1965	1964	1945	1931	1931	1931	1934	1934	1934	1988	1941

SUMMARY STATISTICS	FOR 1997 CALENDAR YEAR		FOR 1998 WATER YEAR		WATER YEARS 1923 - 1998
ANNUAL TOTAL	762171		1059562
ANNUAL MEAN	2088		2903		1757
HIGHEST ANNUAL MEAN					4477	1993
LOWEST ANNUAL MEAN					365	1931
HIGHEST DAILY MEAN	17200	Mar 1	19600	May 10	27000	Mar 7 1979
LOWEST DAILY MEAN	90	Oct 25	77	Sep 29	10	Oct 6 1956
ANNUAL SEVEN-DAY MINIMUM	96	Oct 10	84	Sep 24	14	Aug 2 1934
INSTANTANEOUS PEAK FLOW			19700	May 10	27000	A
INSTANTANEOUS PEAK STAGE			15.88	May 10	21.68 B	Mar 7 1979
INSTANTANEOUS LOW FLOW			76	C	9.0	D
ANNUAL RUNOFF (CFSM)	1.00		1.39		.84
ANNUAL RUNOFF (INCHES)	13.56		18.85		11.42
10 PERCENT EXCEEDS	5360		8480		4780
50 PERCENT EXCEEDS	893		1260		735
90 PERCENT EXCEEDS	158		106		79

A - May 13, 1933, Mar. 7, 1979.
B - Present datum, ice jam.
C - Sep. 28-30.
D - Oct. 6-8, 1956.