07020500 DATA: Discharge Tables, 2001

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07020500 MISSISSIPPI RIVER AT CHESTER, IL

LOCATION.-- Lat 37°54'10", long 89°50'10", 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: Extreme 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 sea level. 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, 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	107000	101000	109000	70700	212000	459000	282000	417000	340000	369000	183000	137000
2	105000	93300	109000	71500	217000	451000	268000	420000	346000	354000	191000	132000
3	100000	86300	110000	72300	197000	424000	268000	421000	365000	342000	200000	118000
4	93200	84000	108000	71300	185000	381000	265000	420000	397000	334000	187000	105000
5	93800	86800	110000	72000	176000	335000	274000	418000	430000	328000	174000	103000

6	117000	91200	107000	74800	160000	305000	306000	413000	469000	325000	170000	104000
7	120000	103000	99100	75300	152000	292000	323000	413000	502000	329000	169000	101000
8	116000	116000	89100	75200	143000	280000	318000	419000	532000	331000	166000	99400
9	115000	115000	80300	75700	139000	266000	306000	429000	562000	319000	163000	104000
10	105000	123000	75100	74700	173000	252000	305000	447000	583000	301000	161000	109000

11	94600	132000	72700	73500	246000	239000	307000	460000	590000	282000	160000	102000
12	90700	144000	74700	73500	310000	229000	330000	460000	585000	264000	152000	104000
13	92500	153000	75400	71200	330000	223000	362000	455000	564000	254000	142000	113000
14	92400	159000	66300	72500	313000	212000	378000	454000	534000	238000	133000	121000
15	92200	148000	63400	83000	288000	210000	378000	463000	501000	226000	119000	120000

16	95700	138000	64400	89300	269000	238000	377000	469000	469000	220000	97000	121000
17	108000	138000	66100	99400	254000	293000	383000	473000	442000	212000	92400	120000
18	114000	135000	71900	96800	241000	367000	387000	478000	431000	200000	90800	114000
19	112000	134000	72900	97500	227000	416000	391000	487000	439000	195000	98900	105000
20	104000	136000	73400	101000	216000	429000	393000	494000	443000	198000	101000	104000

21	94800	137000	71000	100000	208000	420000	394000	501000	434000	188000	99500	104000
22	87700	128000	68800	103000	199000	402000	396000	503000	415000	186000	98000	145000
23	84200	126000	72100	104000	188000	381000	398000	496000	412000	182000	99700	178000
24	87900	118000	77300	101000	183000	361000	400000	485000	432000	178000	107000	177000
25	97300	112000	79500	98600	241000	350000	406000	470000	448000	187000	142000	164000

26	96700	112000	76600	93100	354000	345000	412000	453000	450000	185000	144000	153000
27	92800	116000	73500	89100	410000	345000	416000	432000	443000	178000	128000	141000
28	90200	114000	72400	86000	446000	340000	415000	407000	429000	181000	119000	136000
29	92000	112000	70200	82000	---	331000	414000	380000	407000	196000	118000	140000
30	93800	111000	72100	94000	---	314000	415000	357000	386000	202000	125000	141000

31	98400	---	72100	165000	---	296000	---	344000	---	191000	134000	---

MEAN	99480	120100	80750	87320	238500	328600	355600	443200	459300	247600	137600	123800
MAX	120000	159000	110000	165000	446000	459000	416000	503000	590000	369000	200000	178000
MIN	84200	84000	63400	70700	139000	210000	265000	344000	340000	178000	90800	99400
IN.	.16	.19	.13	.14	.35	.53	.56	.72	.72	.40	.22	.20

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1942 - 2001, BY WATER YEAR (WY)
MEAN	150900	157800	140500	131800	161900	252400	336200	322600	287700	244400	161400	147100
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 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1942 - 2001
ANNUAL MEAN	143300		226300		207800
HIGHEST ANNUAL MEAN					441700	1993
LOWEST ANNUAL MEAN					96770	1956
HIGHEST DAILY MEAN	424000	Jun 30	590000	Jun 11	1000000	Aug 6 1993
LOWEST DAILY MEAN	63400	Dec 15	63400	Dec 15	37600	Jan 1 1964
ANNUAL SEVEN-DAY MINIMUM	68300	Dec 14	68300	Dec 14	38500	Dec 20 1963
MAXIMUM PEAK FLOW			591000	Jun 11	1000000	Aug 7 1993
MAXIMUM PEAK STAGE			35.31	Jun 11	49.74	Aug 7 1993
INSTANTANEOUS LOW FLOW			62900	Dec 15	30000	Dec 12 1937
ANNUAL RUNOFF (INCHES)	2.75		4.34		3.99
10 PERCENT EXCEEDS	255000		440000		401000
50 PERCENT EXCEEDS	120000		174000		167000
90 PERCENT EXCEEDS	81600		80000		78100