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" (NAD of 1927), 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: Extremes 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 NGVD of 1929. 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, 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 98300  142000  94700  107000  64100  104000  143000  243000  288000  179000  156000  79200 
2 100000  140000  94900  109000  64700  103000  137000  e248000  271000  173000  148000  85400 
3 102000  134000  94900  113000  66000  103000  133000  e247000  257000  172000  143000  124000 
4 106000  128000  95300  113000  67800  104000  128000  e268000  244000  175000  137000  136000 
5 110000  127000  92900  108000  69200  104000  124000  e284000  229000  183000  129000  131000 
 
6 117000  126000  91600  103000  69800  101000  122000  e312000  217000  185000  125000  139000 
7 125000  127000  84200  99600  68400  97600  127000  370000  206000  183000  123000  129000 
8 128000  127000  76800  97900  67800  96900  132000  400000  201000  181000  122000  113000 
9 132000  125000  75300  95000  70400  96200  134000  412000  198000  180000  116000  101000 
10 134000  126000  75800  92600  71000  95800  135000  420000  187000  183000  114000  93500 
 
11 133000  122000  76200  89400  72400  92900  137000  434000  195000  202000  109000  87300 
12 132000  115000  77700  86300  72100  87300  138000  454000  243000  228000  104000  81500 
13 138000  112000  78900  82000  70600  83600  136000  473000  265000  239000  100000  77800 
14 146000  111000  79700  77300  69900  83800  135000  468000  304000  240000  97300  77600 
15 154000  112000  81500  72100  71800  90400  132000  441000  321000  238000  94300  78000 
 
16 152000  112000  85700  66100  74600  102000  126000  408000  303000  238000  92900  83800 
17 152000  112000  89600  62500  86100  114000  124000  378000  274000  232000  91300  98700 
18 159000  110000  91300  63500  94700  115000  124000  355000  254000  228000  88800  109000 
19 159000  109000  105000  69000  99000  115000  127000  345000  244000  232000  85700  107000 
20 164000  108000  117000  71200  110000  119000  127000  336000  235000  242000  82500  95800 
 
21 167000  108000  122000  69200  113000  132000  128000  328000  225000  241000  80900  87600 
22 164000  104000  120000  66400  117000  165000  129000  319000  211000  228000  78500  87700 
23 161000  102000  116000  65000  127000  179000  129000  317000  198000  211000  76000  91900 
24 157000  101000  112000  63400  126000  169000  136000  316000  185000  200000  75400  95900 
25 154000  101000  109000  63500  119000  158000  158000  323000  175000  198000  77300  98200 
 
26 152000  102000  106000  64600  114000  154000  201000  342000  173000  192000  80100  98400 
27 153000  100000  102000  66400  110000  152000  220000  343000  197000  185000  79500  99000 
28 143000  98600  93600  66500  108000  144000  237000  333000  214000  180000  77600  95900 
29 133000  99300  86700  65400  ---  139000  242000  322000  209000  173000  75500  93800 
30 136000  97100  84800  65100  ---  146000  241000  310000  193000  165000  86100  88600 
 
31 142000  ---  95300  64400  ---  148000  ---  300000  ---  162000  85100  --- 

MEAN 138800 114600 93750 80560 86940 119200 148100 350000 230500 201500 101000 98820
MAX 167000 142000 122000 113000 127000 179000 242000 473000 321000 242000 156000 139000
MIN 98300 97100 75300 62500 64100 83600 122000 243000 173000 162000 75400 77600
IN. 0.22 0.18 0.15 0.13 0.13 0.19 0.23 0.57 0.36 0.33 0.16 0.15
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1933 - 2003, BY WATER YEAR (WY)
MEAN 149700 156600 141400 133800 163500 250500 327000 326000 289400 239000 156300 142300
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 2002 CALENDAR YEAR FOR 2003 WATER YEAR WATER YEARS 1933 - 2003
ANNUAL MEAN 207400      147500      206700     
HIGHEST ANNUAL MEAN 446000      1993
LOWEST ANNUAL MEAN 71730      1934
HIGHEST DAILY MEAN 828000          May 18 473000          May 13 978000      Aug 7 1993
LOWEST DAILY MEAN 75300          Dec 9 62500          Jan 17 24700      Jan 21 1940
ANNUAL SEVEN-DAY MINIMUM 77200          Dec 8 65000          Jan 23 26700      Jan 20 1940
MAXIMUM PEAK FLOW 478000          May 13 996000      Aug 7 1993
MAXIMUM PEAK STAGE 33.33     May 13 45.91 May 23 1995
INSTANTANEOUS LOW FLOW 62000          Jan 17 23400      Dec 13 1937
ANNUAL RUNOFF (INCHES) 3.95 2.81 3.94
10 PERCENT EXCEEDS 414000      255000      403000     
50 PERCENT EXCEEDS 154000      122000      166000     
90 PERCENT EXCEEDS 99500      75700      75900     



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data