07022000 DATA: Discharge Tables, 2001

Station list Available data
LOWER MISSISSIPPI RIVER BASIN

07022000 MISSISSIPPI RIVER AT THEBES, IL

(National Stream-Quality Accounting Network Station)

LOCATION.-- Lat 37°13'00", long 89°27'50", in NW 1/4 sec.17, T.15 S., R.3 W., Alexander County, Hydrologic Unit 07140105, near center span on downstream side of railroad bridge at Thebes, 5.0 mi downstream from Headwater Diversion Channel, and at mile 43.7 above Ohio River.

DRAINAGE AREA.-- 713,200 mi², approximately.

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

DISCHARGE: October 1932 to current year. Monthly discharge only for some periods, published in WSP 1311. Prior to April 1941, published as "at Cape Girardeau, Mo".

STAGE: March 1933 to February 1938 and October 1939 to current year in reports of the U.S. Geological Survey. Prior to April 1941, published as "at Cape Girardeau, Mo". Since November 1878, under name of "at Grays Point" in files of the U.S. Army Corps of Engineers; January 1879 to May of 1896, published as "at Grays Point"; since May 1896, published as "at Cape Girardeau" in reports of the Mississippi River Commission February 1891 to February 1894; and since 1904, published as "at Cape Girardeau" in reports of the National Weather Service.

SURFACE-WATER QUALITY

CHEMICAL: January 1973 to current year.

SEDIMENT: October 1980 to current year.

SPECIFIC CONDUCTANCE: October 1974 to September 1981.

WATER TEMPERATURE: October 1974 to September 1981.

REVISED RECORDS.-- WSP 1341: 1844(M). WDR MO-76-1: Drainage area, WDR MO-98-1: Extreme outside period of record.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and telemark. Datum of gage is 300.00 ft above sea level. Mar. 17, 1933, to Dec. 21 1934, nonrecording gage; Dec. 22, 1934, to Apr. 4, 1941, water-stage recorder, at site 8.2 mi upstream at datum 4.65 ft higher; Apr. 5, 1941, to Sept. 30, 1941, nonrecording gage at present site and datum; Oct. 1, 1941, to Oct. 11, 1943, at datum 0.07 ft higher. Prior to Apr. 5, 1941, various auxiliary gages used. Since Oct. 1, 1943, former gage at Cape Girardeau used as auxiliary gage.

REMARKS.-- Natural flow of stream affected by many reservoirs and navigation dams in the upper Mississippi River Basin and by many reservoirs and diversions for irrigation in the Missouri River Basin. NASQAN station January 1973 to September 1986. Illinois Environmental Protection Agency station October 1986 to September 1994 (during the period, samples were analyzed by the Illinois EPA). Re-established as a NASQAN station October 1994 to current year.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 996,000 ft³/s, August 7, 1993; maximum gage height, 45.91 ft, May 23, 1995; minimum discharge, 23,400 ft³/s, December 13, 1937.
SPECIFIC CONDUCTANCE: Maximum daily, 705 microsiemens per centimeter, Aug. 5-7, 1980; minimum daily, 272 microsiemens per centimeter, Apr. 6, 1979.
WATER TEMPERATURE: Maximum daily, 31.5 °C, July 10 and 11, 1975, and July 17, 1977; minimum daily, 0.0 °C, on several days during winter periods.
SUSPENDED-SEDIMENT CONCENTRATONS: Maximum daily mean, 3,890 mg/L, Dec. 22, 1985; minimum daily mean, 13 mg/L, Jan. 28, 1981.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 6,280,000 tons, Mar. 1, 1985; minimum daily, 2,530 tons, Jan. 28, 1981.

EXTREMES OUTSIDE PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Flood of July 4, 1844, reached an elevation of 345.14 ft, present datum, at Grays Point, from floodmarks, discharge, 1,075,000 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	109000	98400	112000	77100	175000	505000	284000	414000	346000	381000	193000	139000
2	107000	99200	110000	76200	216000	506000	269000	418000	342000	365000	189000	138000
3	105000	93200	110000	77000	215000	481000	262000	421000	345000	351000	199000	132000
4	100000	87700	110000	77400	197000	432000	269000	423000	368000	346000	201000	119000
5	94400	85900	109000	76700	187000	377000	270000	422000	399000	337000	187000	109000

6	98900	89200	110000	77700	173000	331000	288000	419000	435000	329000	176000	108000
7	114000	93900	107000	79600	162000	307000	312000	417000	471000	329000	172000	108000
8	117000	106000	99700	79600	154000	294000	319000	418000	509000	331000	169000	105000
9	115000	115000	90900	80200	144000	280000	309000	426000	546000	329000	167000	104000
10	112000	116000	84000	80400	147000	264000	301000	439000	578000	314000	164000	109000

11	104000	123000	80300	79700	197000	249000	301000	456000	599000	296000	163000	110000
12	95800	131000	80000	79000	278000	234000	309000	467000	612000	279000	161000	106000
13	92700	142000	81600	78600	327000	225000	335000	464000	613000	e264000	152000	107000
14	93200	150000	80100	77400	327000	216000	361000	460000	590000	e250000	142000	113000
15	93600	153000	73900	81100	308000	206000	372000	461000	562000	e236000	133000	118000

16	93500	143000	72200	89000	291000	216000	376000	471000	524000	e227000	119000	118000
17	98800	136000	73000	96400	275000	255000	383000	475000	486000	223000	103000	119000
18	108000	136000	75100	103000	262000	321000	392000	482000	453000	212000	98900	118000
19	112000	132000	80600	102000	248000	386000	396000	501000	443000	221000	99300	112000
20	110000	132000	84500	103000	236000	420000	396000	507000	446000	221000	104000	106000

21	104000	134000	85100	105000	226000	425000	396000	516000	447000	204000	105000	104000
22	e95200	132000	83500	105000	218000	414000	395000	528000	433000	194000	104000	111000
23	e87600	126000	81900	107000	207000	395000	395000	536000	415000	189000	103000	148000
24	86500	123000	85800	108000	197000	375000	398000	530000	420000	183000	104000	172000
25	91000	119000	89600	107000	225000	359000	402000	516000	438000	184000	117000	169000

26	97200	114000	88300	104000	340000	351000	408000	497000	449000	191000	143000	158000
27	96500	114000	83500	98100	430000	348000	412000	471000	448000	187000	141000	147000
28	93300	117000	80100	93700	478000	346000	415000	442000	439000	182000	129000	138000
29	91900	115000	78300	90200	---	337000	416000	409000	423000	190000	122000	135000
30	93000	114000	76600	89400	---	322000	414000	378000	400000	205000	121000	138000

31	95200	---	77600	110000	---	302000	---	358000	---	204000	130000	---

MEAN	100200	119000	88200	89950	244300	338000	351800	456200	466000	256600	142300	123900
MAX	117000	153000	112000	110000	478000	506000	416000	536000	613000	381000	201000	172000
MIN	86500	85900	72200	76200	144000	206000	262000	358000	342000	182000	98900	104000
IN.	.16	.19	.14	.15	.36	.55	.55	.74	.73	.41	.23	.19

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1933 - 2001, BY WATER YEAR (WY)
MEAN	150000	157700	141600	135000	164400	253300	330800	321800	289300	240400	157200	143100
MAX	589600	389000	531700	333300	350400	542000	731000	655800	584100	765500	768000	539300
(WY)	1987	1986	1983	1973	1974	1985	1973	1973	1947	1993	1993	1993
MIN	45500	50080	53850	33650	46920	80260	115600	88170	72350	73290	45000	59890
(WY)	1940	1940	1956	1940	1940	1934	1934	1934	1934	1936	1936	1937

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1933 - 2001
ANNUAL MEAN	146700		230900		207500
HIGHEST ANNUAL MEAN					446000	1993
LOWEST ANNUAL MEAN					71730	1934
HIGHEST DAILY MEAN	426000	Jun 30	613000	Jun 13	978000	Aug 7 1993
LOWEST DAILY MEAN	72200	Dec 16	72200	Dec 16	24700	Jan 21 1940
ANNUAL SEVEN-DAY MINIMUM	76600	Dec 12	76600	Dec 12	26700	Jan 20 1940
MAXIMUM PEAK FLOW			620000	Jun 12	996000	Aug 7 1993
MAXIMUM PEAK STAGE			37.82	Jun 12	45.91	May 23 1995
INSTANTANEOUS LOW FLOW			71800	Dec 16	23400	Dec 13 1937
ANNUAL RUNOFF (INCHES)	2.80		4.40		3.95
10 PERCENT EXCEEDS	257000		446000		404000
50 PERCENT EXCEEDS	125000		173000		167000
90 PERCENT EXCEEDS	86500		86300		75400