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     



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data