07020500 DATA: Discharge Tables, 2003

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07020500 MISSISSIPPI RIVER AT CHESTER, IL


LOCATION.-- Lat 37°54'10", long 89°50'10" (NAD of 1927), in SW 1/4 sec.24, T.7 S., R.7 W., third principal meridian, Randolph County, Hydrologic Unit 07140105, on downstream side of left pier of main truss of highway bridge at Chester, 8.1 mi downstream from Kaskaskia River, and at mile 109.9 above Ohio River.

DRAINAGE AREA.-- 708,600 mi², approximately.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
	DISCHARGE: October 1927 to current year in reports of the U.S. Geological Survey. Monthly discharge only for some periods, published in WSP 1311. Since August 1873, results of discharge measurements in reports of the Mississippi River Commission.
	STAGE: July 1942 to current year in reports of the U.S. Geological Survey. Since May 1891, in reports of the Mississippi River Commission and National Weather Service.
SURFACE-WATER QUALITY
	SEDIMENT: August 1980 to current year.

REVISED RECORDS.-- WDR MO-76-1: Drainage area. WDR MO-98-1: Extremes outside period of record.

GAGE.-- Water-stage recorder and U.S. Army Corps of Engineers satellite telemeter. Datum of gage is 341.05 ft above NGVD of 1929. Prior to Feb. 1, 1962, nonrecording gage 0.4 mi downstream at present datum.

REMARKS.-- Natural flow of stream affected by many reservoirs and navigation dams in upper Mississippi River Basin and by many reservoirs and diversions for irrigation in Missouri River Basin.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,000,000 ft³/s, August 7, 1993, gage height, 49.74 ft; minimum discharge, 30,000 ft³/s, December 12, 1937.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 3,380 mg/L, Apr. 13, 1987; minimum daily mean, 13 mg/L, Mar. 18, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,330,000 tons, Feb. 25, 1997; minimum daily, 3,580 tons, Mar. 18, 1981.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of June 30, 1844, reached a gage height of 39.8 ft, discharge, 1,050,000 ft³/s, computed by the U.S. Army Corps of Engineers.

REMARKS FOR CURRENT YEAR.--Records good.

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	96400	139000	95000	85400	60500	82300	133000	239000	270000	167000	143000	72600
2	98300	133000	95200	93500	62200	83500	131000	242000	254000	167000	139000	105000
3	102000	127000	96300	95500	63700	84900	126000	245000	243000	167000	131000	134000
4	109000	125000	93100	91500	65500	85300	124000	253000	228000	176000	124000	120000
5	112000	125000	93100	86500	66200	84200	121000	287000	214000	181000	120000	132000

6	125000	125000	85600	83600	64500	82100	125000	329000	204000	179000	117000	129000
7	126000	127000	76300	82600	62800	80900	130000	367000	195000	178000	118000	110000
8	131000	124000	75600	80200	66200	80500	135000	371000	194000	175000	112000	95500
9	132000	123000	76300	79000	66000	81000	134000	378000	186000	176000	110000	87200
10	132000	119000	76900	78200	67700	79800	136000	378000	173000	187000	106000	81000

11	129000	111000	78800	78000	67700	75000	135000	392000	192000	216000	101000	75700
12	136000	108000	79400	75800	67300	70500	132000	416000	230000	231000	97000	73900
13	143000	107000	79300	72100	64200	70400	130000	426000	253000	235000	94000	75300
14	153000	107000	80100	67200	63100	75600	128000	411000	294000	233000	90800	75400
15	150000	107000	84000	60700	64300	88900	121000	381000	290000	232000	89400	80200

16	149000	109000	86900	57200	70500	105000	116000	349000	265000	229000	88100	95700
17	157000	107000	85000	58000	79000	107000	115000	325000	242000	222000	86200	109000
18	158000	107000	85700	64600	81300	105000	118000	314000	228000	221000	83200	107000
19	160000	106000	95300	67500	80400	109000	119000	308000	221000	229000	79900	95300
20	166000	107000	109000	65500	89900	116000	120000	302000	214000	237000	78900	85000

21	163000	102000	107000	62500	92300	148000	124000	296000	203000	228000	76700	84600
22	160000	99700	104000	61200	97000	170000	125000	292000	190000	211000	73900	89900
23	157000	99900	99500	59800	101000	162000	131000	292000	178000	197000	73200	93100
24	153000	98400	96900	59800	97000	148000	143000	293000	166000	193000	75300	95900
25	150000	101000	94300	61300	91500	141000	167000	304000	159000	191000	79100	94400

26	153000	99400	92000	62800	89400	141000	200000	316000	169000	183000	78700	96200
27	145000	97500	83700	63000	86800	135000	219000	310000	201000	177000	76000	93100
28	132000	98800	76400	61600	84200	129000	233000	303000	207000	169000	73400	91400
29	131000	97300	71700	61500	---	136000	233000	296000	194000	160000	73500	86300
30	142000	94600	71300	60500	---	141000	233000	289000	176000	157000	78700	79300

31	141000	---	76200	59900	---	140000	---	283000	---	152000	74500	---

MEAN	138400	111100	87090	70850	75440	107700	144600	322200	214400	195400	94890	94770
MAX	166000	139000	109000	95500	101000	170000	233000	426000	294000	237000	143000	134000
MIN	96400	94600	71300	57200	60500	70400	115000	239000	159000	152000	73200	72600
IN.	0.23	0.17	0.14	0.12	0.11	0.18	0.23	0.52	0.34	0.32	0.15	0.15

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1942 - 2003, BY WATER YEAR (WY)
MEAN	150400	156400	139700	130200	160500	248800	331400	326000	287400	242600	160100	145900
MAX	588300	380400	500100	323200	331000	528400	719100	630900	597200	795300	769500	551000
(WY)	1987	1986	1983	1973	1974	1973	1973	1995	1947	1993	1993	1993
MIN	59490	59320	51070	47810	52860	84200	129400	127200	81040	69050	69580	66030
(WY)	1957	1957	1964	1964	1964	1964	2000	1989	1988	1988	1988	1976

SUMMARY STATISTICS	FOR 2002 CALENDAR YEAR		FOR 2003 WATER YEAR		WATER YEARS 1942 - 2003
ANNUAL MEAN	195200		138500		206600
HIGHEST ANNUAL MEAN					441700	1993
LOWEST ANNUAL MEAN					96770	1956
HIGHEST DAILY MEAN	732000	May 17	426000	May 13	1000000	Aug 6 1993
LOWEST DAILY MEAN	71300	Dec 30	57200	Jan 16	37600	Jan 1 1964
ANNUAL SEVEN-DAY MINIMUM	77500	Dec 7	61300	Jan 27	38500	Dec 20 1963
MAXIMUM PEAK FLOW			427000	May 13	1000000	Aug 7 1993
MAXIMUM PEAK STAGE			27.11	May 13	49.74	Aug 7 1993
INSTANTANEOUS LOW FLOW			56800	Jan 16	30000	Dec 12 1937
ANNUAL RUNOFF (INCHES)	3.74		2.65		3.96
10 PERCENT EXCEEDS	391000		242000		399000
50 PERCENT EXCEEDS	152000		112000		166000
90 PERCENT EXCEEDS	93100		71000		78100