07020500 DATA: Discharge Tables, 2000

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.--
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 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	143000	107000	117000	82400	86200	180000	141000	166000	201000	417000	153000	105000
2	156000	106000	114000	88600	81400	178000	143000	164000	183000	399000	151000	110000
3	150000	107000	113000	98700	78900	167000	136000	152000	192000	377000	143000	112000
4	137000	100000	110000	104000	85700	172000	130000	149000	205000	355000	145000	109000
5	133000	102000	113000	104000	88900	180000	124000	143000	204000	334000	143000	105000

6	128000	105000	118000	95300	85000	181000	116000	133000	212000	319000	139000	94200
7	126000	108000	123000	94600	85600	176000	120000	134000	221000	303000	131000	86800
8	122000	107000	129000	93600	87700	167000	120000	186000	222000	299000	130000	88200
9	125000	104000	134000	87800	83500	161000	120000	213000	222000	300000	147000	83300
10	120000	101000	129000	94000	80100	157000	117000	174000	225000	296000	166000	85600

11	117000	104000	130000	99200	77600	151000	110000	137000	228000	280000	173000	91800
12	118000	104000	127000	97700	78000	150000	109000	125000	233000	262000	162000	98000
13	118000	109000	130000	93800	78500	151000	108000	130000	239000	263000	145000	98000
14	119000	110000	136000	99000	81500	146000	110000	132000	239000	263000	135000	96600
15	116000	107000	126000	97300	81700	136000	108000	127000	238000	258000	116000	107000

16	115000	103000	119000	95900	79300	127000	102000	128000	243000	256000	104000	111000
17	110000	105000	118000	88400	81000	126000	99600	126000	287000	256000	105000	114000
18	109000	104000	118000	84000	86100	131000	103000	127000	306000	255000	115000	113000
19	104000	103000	114000	85500	108000	133000	104000	127000	309000	265000	125000	119000
20	105000	107000	104000	84900	120000	138000	100000	126000	304000	283000	127000	118000

21	104000	100000	99800	90200	125000	148000	111000	125000	307000	284000	127000	113000
22	104000	93900	86500	87000	116000	146000	122000	136000	321000	277000	123000	107000
23	103000	96300	76600	83500	105000	140000	150000	152000	328000	267000	122000	106000
24	104000	99500	74300	81500	96000	143000	179000	164000	347000	254000	124000	104000
25	102000	108000	74600	80000	95900	143000	177000	168000	386000	236000	136000	97600

26	104000	114000	78800	78600	98800	137000	169000	173000	390000	211000	161000	106000
27	106000	111000	82100	74300	122000	134000	167000	182000	389000	192000	174000	120000
28	107000	114000	78500	82200	152000	134000	161000	215000	402000	172000	156000	124000
29	106000	117000	76800	91000	174000	122000	162000	251000	421000	170000	132000	116000
30	103000	122000	77500	91300	---	122000	163000	239000	424000	169000	119000	109000

31	104000	---	78000	88600	---	132000	---	219000	---	153000	110000	---

MEAN	116700	106000	106600	90220	96530	148700	129400	158800	280900	271800	136700	104900
MAX	156000	122000	136000	104000	174000	181000	179000	251000	424000	417000	174000	124000
MIN	102000	93900	74300	74300	77600	122000	99600	125000	183000	153000	104000	83300
IN.	.19	.17	.17	.15	.15	.24	.20	.26	.44	.44	.22	.17

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1942 - 2000, BY WATER YEAR (WY)
MEAN	151800	158400	141500	132600	160600	251100	335800	320500	284700	244400	161800	147500
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 1999 CALENDAR YEAR		FOR 2000 WATER YEAR		WATER YEARS 1942 - 2000
ANNUAL MEAN	239600		145800		207500
HIGHEST ANNUAL MEAN					441700	1993
LOWEST ANNUAL MEAN					96770	1956
HIGHEST DAILY MEAN	551000	May 9	424000	Jun 30	1000000	Aug 6 1993
LOWEST DAILY MEAN	74300	Dec 24	74300	Dec 24,Jan 27	37600	Jan 1 1964
ANNUAL SEVEN-DAY MINIMUM	77400	Dec 23	77400	Dec 23	38500	Dec 20 1963
INSTANTANEOUS PEAK FLOW	---		425000	Jun 30	1000000	Aug 7 1993
INSTANTANEOUS PEAK STAGE	---		27.74	Jun 30	49.74	Aug 7 1993
INSTANTANEOUS LOW FLOW	---		73000	Dec 25	30000	Dec 12 1937
ANNUAL RUNOFF (INCHES)	4.59		2.80		3.98
10 PERCENT EXCEEDS	456000		255000		399000
50 PERCENT EXCEEDS	213000		122000		167000
90 PERCENT EXCEEDS	105000		86200		78100