05543500 DATA: Discharge Tables, 2000

ILLINOIS RIVER BASIN

05543500 ILLINOIS RIVER AT MARSEILLES, IL

LOCATION.-- Lat 41°19'37", long 88°43'03", in SE1/4SW1/4 sec.13, T.33 N., R.4 E., La Salle County, Hydrologic Unit 07120005, on right bank 0.5 mi downstream from Marseilles Dam in Marseilles, 6.9 mi upstream from Fox River, and at mile 246.5.

DRAINAGE AREA.-- 8,259 mi², does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.

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

DISCHARGE: October 1919 to current year. Prior to October 1939, published as "at Morris."

STAGE: Water years 1994-2000.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1975-96.

SPECIFIC CONDUCTANCE: Water years 1975-81.

WATER TEMPERATURE: Water years 1975-81.

MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996.

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

GAGE.-- Water-stage recorder, phone telemeter, and U.S. Army Corps of Engineers satellite telemeter and rain gage. Datum of gage is 462.91 ft above sea level. October 1919 to January 1935, nonrecording gage at site at Morris, 16.6 mi upstream, at datum 478.50 ft above sea level. January 1935 to September 1939, water-stage recorder at site 300 ft downstream from site used 1919-35 and at that datum.

REMARKS.-- Figures of daily discharge include flow through navigation locks. Flow regulated by powerplants and navigation dam above station. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 95,000 ft³/s, Feb. 22, 1997, gage height, 16.85 ft; minimum daily, 1,460 ft³/s, Oct. 16, 1943 and Nov. 10, 1999.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: A stage of 26.2 ft at Morris occurred in 1831, and a stage of 25.4 ft (ice jam) occurred at present site on Jan. 21, 1916.

REMARKS FOR CURRENT YEAR.-- Records good except those for Aug. 21 to Sept. 30, which are fair, and those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	6280	2580	2050	3960	e2400	7090	4810	8600	22100	11500	7580	4890
2	4930	2110	2810	2480	e2350	7370	4240	9050	20500	10800	7780	3620
3	4230	2040	2580	4050	e2400	6830	3540	8440	15400	15600	6900	3710
4	5830	1920	2930	4080	e2600	6430	3160	8090	12400	16200	7120	3670
5	5110	1810	10200	3780	e2300	6280	5270	7400	12500	17400	6320	4260

6	4740	1710	8180	4500	e2450	5850	3320	7100	12500	17300	6160	3410
7	4110	2640	6740	2320	e2500	4780	4490	6990	10800	16500	9450	3340
8	3400	1730	5920	3550	1910	4820	6040	6520	9800	15800	8270	3380
9	3790	2680	5570	3640	3350	4980	5450	10800	9520	13000	7660	3360
10	3700	1460	4190	3460	3100	4590	5740	11600	8460	28900	6120	3210

11	2870	3100	3960	5070	3350	4190	5170	11700	8860	43800	5890	5400
12	2900	1690	4090	3860	4600	3760	5800	11700	10800	33600	5590	15600
13	3570	1980	3520	3530	2840	4460	5120	12000	13800	24500	5020	10100
14	2900	1920	3140	3540	3580	3850	4660	11800	18500	18300	4270	10200
15	2940	1930	4850	3580	3730	4010	3970	10800	21600	14400	4380	8840

16	1710	2450	3650	3800	3060	5710	4730	9260	18900	12000	4080	7530
17	3340	2300	4620	3350	3930	3440	9730	8730	14400	9840	5740	6350
18	2160	2140	3700	2630	3950	4940	9430	8110	13300	8730	6800	5150
19	2730	2000	3920	3470	3740	5220	8900	9250	11100	7970	5130	5120
20	1650	2130	2960	2710	3960	5860	16900	10400	11600	7550	4760	4060

21	2900	1780	3830	2820	3660	5770	30100	10300	19700	6680	4690	5710
22	1920	2840	3240	2540	6130	5720	30500	10800	26200	6450	4370	5420
23	1540	3710	2650	2160	7180	6160	25200	9450	20900	6120	3920	7000
24	1580	2650	3670	2800	9260	6280	20700	8490	18800	5120	4460	8340
25	3150	2580	2300	2230	10600	5020	17600	8450	30800	5240	3520	7770

26	1700	3490	3420	e2500	10500	5440	15300	8010	30000	5400	3280	6350
27	2840	1930	2550	e2700	9130	6140	13000	7920	23200	4500	3550	5380
28	1720	2050	2040	e2400	8870	5160	11100	12000	18000	5190	3790	4810
29	3200	2870	4010	e2300	7640	4720	10400	12200	15500	5230	3650	5370
30	1890	2110	3160	e2450	---	5110	9040	11800	13700	6860	3970	3680

31	2910	---	3700	e2500	---	4460	---	12900	---	7650	3130	---

TOTAL	98240	68330	124150	98760	135070	164440	303410	300660	493640	408130	167350	175030
MEAN	3169	2278	4005	3186	4658	5305	10110	9699	16450	13170	5398	5834
MAX	6280	3710	10200	5070	10600	7370	30500	12900	30800	43800	9450	15600
MIN	1540	1460	2040	2160	1910	3440	3160	6520	8460	4500	3130	3210

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1920 - 2000, BY WATER YEAR (WY)
MEAN	7514	8526	9745	10100	11640	15120	16300	13770	11840	9298	7821	7727
MAX	21050	24180	30100	28430	25970	41290	33180	35180	25940	21020	19220	22770
(WY)	1927	1986	1983	1993	1997	1979	1922	1943	1993	1957	1924	1993
MIN	3169	2278	3739	3186	3264	5153	6516	5649	4346	4687	4242	3345
(WY)	2000	2000	1944	2000	1963	1964	1986	1988	1988	1988	1939	1999

SUMMARY STATISTICS	FOR 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1920 - 2000
ANNUAL TOTAL	3288540		2537210
ANNUAL MEAN	9010		6932		10770
HIGHEST ANNUAL MEAN					17850	1993
LOWEST ANNUAL MEAN					5583	1964
HIGHEST DAILY MEAN	46000	Jan 25	43800	Jul 11	89600	Feb 22 1997
LOWEST DAILY MEAN	1460	Nov 10	1460	Nov 10	1460	A
ANNUAL SEVEN-DAY MINIMUM	1990	Jan 9	1990	Nov 4	1990 B	Jan 9 1999
INSTANTANEOUS PEAK FLOW			46700	Jul 11	95000	Feb 22 1997
INSTANTANEOUS PEAK STAGE			9.42	Jul 11	16.85	Feb 22 1997
INSTANTANEOUS LOW FLOW			519	Aug 31
10 PERCENT EXCEEDS	20000		14000		19400
50 PERCENT EXCEEDS	5850		4910		9000
90 PERCENT EXCEEDS	2050		2310		4510

A - Oct. 16, 1943 and Nov. 10, 1999.
B - Period estimated due to backwater from ice.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data