05526000 DATA: Discharge Tables, 2001

ILLINOIS RIVER BASIN

05526000 IROQUOIS RIVER NEAR CHEBANSE, IL

LOCATION.-- Lat 41°00'32", long 87°49'24", in SE1/4SW1/4 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.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: April 1923 to current year.

STAGE: Water years 1994-2001.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-1991 and 1999 to current. Additional chemical data for water years 1959-77 are published in Water-Resources Investigations 78-23 and 79-24 as site FL 02.

SEDIMENT: October 1978 to September 1981, January 1993 to December 1995.

MISCELLANEOUS: June and July 1998; Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August 1998.

BIOLOGICAL

BENTHIC MACROINVERTEBRATES: Water year 1999.

FISH: Water year 1999.

HABITAT: Water year 1999.

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, phone telemetry, 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.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 27,000 ft³/s, May 13, 1933, Mar. 7, 1979; maximum gage height 21.68 ft, Mar. 7, 1979, present datum, ice jam; minimum discharge, 9 ft³/s, Oct. 6-8, 1956.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 1,400 mg/L, Apr. 14, 1979; minimum daily, 4 mg/L, Mar. 3, 1994.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 57,000 tons, June 5, 1980; minimum daily, 3.2 tons, Nov. 16, 1979.

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

REMARKS FOR CURRENT YEAR.-- Records good except those for Feb. 1 to Aug. 22, which are fair, and 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	79	96	285	e190	e2000	12300	1070	1030	1590	424	336	1310
2	68	95	298	e200	e4000	9850	1030	975	1520	401	307	1710
3	62	90	e320	e210	e3800	7300	966	925	1940	372	348	1370
4	75	88	e350	e220	e3200	5520	928	860	2320	395	329	937
5	97	88	e380	e220	e2700	4510	887	815	4820	621	291	578

6	113	87	e410	e220	e2200	3730	898	773	12300	1320	e250	381
7	126	100	e420	e210	e1900	3080	1190	751	14500	1520	e210	292
8	131	95	e400	e200	e2500	2560	1680	727	13700	1280	188	230
9	144	102	e370	e200	e5000	2170	2000	695	12200	1110	173	210
10	143	216	e320	e190	e12000	1900	2240	667	10300	1610	153	216

11	136	399	e400	e190	e12500	1700	3650	633	8010	2080	140	332
12	131	547	e450	e190	e12000	1610	5630	606	5820	1740	e110	442
13	123	658	e430	e200	10200	1560	6450	582	4430	1240	e85	396
14	113	679	e370	e210	e7700	1530	6080	542	3510	867	75	326
15	102	648	e310	e230	7200	1480	4770	525	2820	624	73	264

16	99	607	e280	e250	7150	1510	3740	522	2290	476	77	219
17	96	543	e260	e300	6650	1900	3180	522	1840	403	79	184
18	103	491	e240	e400	e5500	2610	2720	522	1500	401	92	161
19	101	428	e220	e450	e4500	3140	2300	616	1250	385	114	192
20	100	365	e200	e430	3480	3070	2000	823	1090	365	122	181

21	91	330	e190	e400	2940	2720	1840	957	988	394	125	174
22	90	e320	e180	e370	2450	2380	2080	901	954	396	133	181
23	91	e290	e170	e350	2050	2090	2410	793	941	395	155	197
24	92	e270	e160	e340	2370	1860	2210	722	919	393	170	189
25	93	248	e150	e320	9500	1660	1960	711	841	410	197	191

26	96	252	e140	e310	13000	1510	1710	763	735	514	434	172
27	89	252	e140	e300	14200	1400	1480	1310	635	586	472	149
28	82	248	e150	e300	14100	1240	1340	2140	559	758	459	138
29	91	259	e160	e330	---	1170	1200	2500	502	746	381	135
30	95	269	e170	e500	---	1120	1090	2220	470	561	310	128

31	96	---	e180	e1000	---	1100	---	1840	---	420	349	---

TOTAL	3148	9160	8503	9430	176790	91280	70729	28968	115294	23207	6737	11585
MEAN	102	305	274	304	6314	2945	2358	934	3843	749	217	386
MAX	144	679	450	1000	14200	12300	6450	2500	14500	2080	472	1710
MIN	62	87	140	190	1900	1100	887	522	470	365	73	128
CFSM	.05	.15	.13	.15	3.02	1.41	1.13	.45	1.84	.36	.10	.18
IN.	.06	.16	.15	.17	3.15	1.62	1.26	.52	2.05	.41	.12	.21

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1923 - 2001, BY WATER YEAR (WY)
MEAN	685	944	1507	1890	2541	3127	3210	2663	2035	1251	455	560
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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1923 - 2001
ANNUAL TOTAL	297574		554831
ANNUAL MEAN	813		1520		1737
HIGHEST ANNUAL MEAN					4477	1993
LOWEST ANNUAL MEAN					365	1931
HIGHEST DAILY MEAN	8860	Jul 12	14500	Jun 7	27000	Mar 7 1979
LOWEST DAILY MEAN	40	Sep 4	62	Oct 3	10	Oct 6 1956
ANNUAL SEVEN-DAY MINIMUM	48	Sep 3	84	Aug 12	14	Aug 2 1934
MAXIMUM PEAK FLOW			14600	Jun 7	27000	A
MAXIMUM PEAK STAGE			13.74	Jun 7	21.68 B	Mar 7 1979
INSTANTANEOUS LOW FLOW			55	Oct 3	9.0	C
ANNUAL RUNOFF (CFSM)	.39		.73		.83
ANNUAL RUNOFF (INCHES)	5.29		9.87		11.29
10 PERCENT EXCEEDS	1930		3730		4730
50 PERCENT EXCEEDS	348		459		725
90 PERCENT EXCEEDS	89		103		79

	A - May 13, 1933, March 7, 1979.
	B - Present datum, ice jam.
	C - Oct. 6-8, 1956.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data