05526000 DATA: Discharge Tables, 2003

Station list Available data
ILLINOIS RIVER BASIN

05526000 IROQUOIS RIVER NEAR CHEBANSE, IL


LOCATION.-- Lat 41°00'32", long 87°49'24" (NAD of 1927), 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 to current year.
SURFACE-WATER QUALITY
	CHEMICAL: Water years 1978-1991 and 1999 to 2001. 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: Water years 1998 and 2002; 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 NGVD of 1929. 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 May 15 to July 3, which are fair, and those for estimated daily discharges, which are poor.

Discharge, cubic feet per second, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	100	140	178	425	e240	e490	597	839	2100	660	2860	425
2	99	135	154	642	e260	e480	549	1010	2080	594	2460	766
3	92	132	e157	729	e290	e470	512	1000	1760	590	2110	2180
4	107	131	e160	617	e330	e470	523	971	1530	637	1990	2890
5	115	135	e150	552	e400	e460	1040	1560	1360	720	1980	2100

6	129	148	e146	476	e470	e440	2180	2440	1230	920	1890	1340
7	118	172	e143	422	e560	e460	3300	2860	1120	2930	1670	936
8	117	181	e141	393	e600	e490	3810	2700	1020	5440	1380	705
9	115	175	e140	388	e550	e550	3980	3360	949	7910	1150	556
10	112	165	e138	429	e490	e750	3610	6300	893	12200	973	459

11	108	182	e138	e600	e440	e1050	2920	8210	793	14900	857	390
12	107	195	e140	e800	e410	e920	2320	8270	895	16400	767	343
13	101	215	145	e650	e380	e850	1880	7580	1700	16800	692	307
14	97	230	147	e550	e350	e790	1570	6210	4640	16100	623	287
15	91	221	146	e470	e330	704	1360	5610	5870	15200	558	271

16	92	229	138	e410	e320	651	1190	5960	5600	14600	510	259
17	96	225	141	e360	e320	600	1080	5110	4540	13000	470	244
18	104	214	175	e320	e320	580	1000	3840	3180	13400	448	228
19	101	205	210	e300	e330	622	929	2890	2330	14100	437	214
20	104	195	319	e280	e340	692	877	2300	1900	13600	418	201

21	109	180	377	e260	e360	818	878	1910	1560	13300	388	199
22	107	187	461	e240	e420	897	951	1710	1310	12800	340	197
23	112	192	487	e230	e460	929	1030	1580	1130	11200	324	190
24	117	178	433	e220	e550	910	978	1410	981	8870	303	195
25	121	174	393	e210	e600	835	909	1260	907	6730	283	196

26	122	170	352	e200	e650	794	850	1150	799	5460	266	219
27	116	173	e360	e190	e550	768	810	1060	736	4750	243	251
28	113	173	e340	e190	e520	772	760	1120	663	4330	236	347
29	115	172	e320	e200	---	750	724	1670	591	4070	232	826
30	127	165	305	e210	---	715	758	1610	604	3710	238	909

31	142	---	321	e220	---	658	---	1780	---	3280	258	---

TOTAL	3406	5389	7355	12183	11840	21365	43875	95280	54771	259201	27354	18630
MEAN	110	180	237	393	423	689	1462	3074	1826	8361	882	621
MAX	142	230	487	800	650	1050	3980	8270	5870	16800	2860	2890
MIN	91	131	138	190	240	440	512	839	591	590	232	190
CFSM	0.05	0.09	0.11	0.19	0.20	0.33	0.70	1.47	0.87	4.00	0.42	0.30
IN.	0.06	0.10	0.13	0.22	0.21	0.38	0.78	1.70	0.97	4.61	0.49	0.33

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1923 - 2003, BY WATER YEAR (WY)
MEAN	736	945	1505	1860	2548	3109	3199	2722	2026	1329	471	556
MAX	8019	5850	8203	9079	7425	11210	8396	10910	7934	8361	2497	7372
(WY)	1994	1986	1928	1950	1982	1982	1950	1943	1958	2003	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 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1923 - 2003
ANNUAL TOTAL	763798		560649
ANNUAL MEAN	2093		1536		1749
HIGHEST ANNUAL MEAN					4477	1993
LOWEST ANNUAL MEAN					365	1931
HIGHEST DAILY MEAN	18500	May 14	16800	Jul 13	27000	Mar 7 1979
LOWEST DAILY MEAN	91	Oct 15	91	Oct 15	10	Oct 6 1956
ANNUAL SEVEN-DAY MINIMUM	97	Oct 13	97	Oct 13	14	Aug 2 1934
MAXIMUM PEAK FLOW			16900	Jul 13	27000	A
MAXIMUM PEAK STAGE			14.75	Jul 13	21.68 B	Mar 7 1979
INSTANTANEOUS LOW FLOW			86	Oct 15	9.0	C
ANNUAL RUNOFF (CFSM)	1.00		0.73		0.84
ANNUAL RUNOFF (INCHES)	13.59		9.97		11.37
10 PERCENT EXCEEDS	5810		3820		4780
50 PERCENT EXCEEDS	815		549		735
90 PERCENT EXCEEDS	119		138		80

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