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.

EXTREMES FOR CURRENT YEAR.--
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,380 mg/L, March 20; minimum daily mean, 82 mg/L, Jan. 13.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 2,100,000 tons, June 10; minimum daily, 16,400 tons, Jan. 5.
SEDIMENT DISCHARGE, SUSPENDED (TONS/DAY), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001
MEAN MEAN MEAN
MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT MEAN CONCEN- SEDIMENT
DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE DISCHARGE TRATION DISCHARGE
DAY (cfs) (mg/L) (tons/day) (cfs) (mg/L) (tons/day) (cfs) (mg/L) (tons/day)
 
OCTOBER NOVEMBER DECEMBER
1 109000 144 42600 98400 121 32200 112000 109 33000
2 107000 155 44700 99200 120 32000 110000 119 35200
3 105000 135 38000 93200 117 29400 110000 131 38900
4 100000 137 36900 87700 129 30500 110000 118 35100
5 94400 143 36400 85900 131 30400 109000 95 27900
 
6 98900 152 40600 89200 132 31800 110000 96 28500
7 114000 153 47200 93900 111 28300 107000 101 28900
8 117000 161 51000 106000 126 35900 99700 115 30900
9 115000 154 47700 115000 137 42300 90900 92 22600
10 112000 151 45500 116000 124 39000 84000 90 20400
 
11 104000 143 40200 123000 143 47600 80300 97 21100
12 95800 144 37200 131000 168 59500 80000 102 22000
13 92700 151 37800 142000 140 53800 81600 --- e21600
14 93200 152 38400 150000 151 61300 80100 --- e20300
15 93600 136 34400 153000 157 64900 73900 --- e18200
 
16 93500 121 30500 143000 150 58000 72200 --- e17400
17 98800 133 35400 136000 159 58500 73000 --- e17200
18 108000 124 35900 136000 153 56000 75100 --- e17300
19 112000 119 36000 132000 114 40700 80600 --- e19500
20 110000 117 34700 132000 112 40000 84500 --- e23200
 
21 104000 140 38900 134000 125 45100 85100 --- e23700
22 e95200 130 33500 132000 130 46200 83500 --- e22700
23 e87600 131 31300 126000 169 57400 81900 --- e21600
24 86500 123 28800 123000 126 41700 85800 --- e23600
25 91000 122 30100 119000 131 42000 89600 --- e26700
 
26 97200 117 30800 114000 130 40200 88300 --- e25800
27 96500 107 27800 114000 149 45900 83500 --- e22600
28 93300 104 26300 117000 141 44500 80100 --- e20800
29 91900 118 29400 115000 135 41700 78300 --- e19500
30 93000 121 30400 114000 137 42000 76600 --- e18300
 
31 95200 111 28700 --- --- --- 77600 --- e18200
 
JANUARY FEBRUARY MARCH
1 77100 --- e17700 175000 232 113000 505000 1310 1790000
2 76200 --- e17200 216000 475 278000 506000 1260 1720000
3 77000 --- e17100 215000 537 311000 481000 1090 1410000
4 77400 --- e16800 197000 447 238000 432000 912 1070000
5 76700 --- e16400 187000 386 195000 377000 829 845000
 
6 77700 84 17500 173000 355 166000 331000 636 569000
7 79600 97 20900 162000 340 149000 307000 553 458000
8 79600 104 22300 154000 258 107000 294000 465 369000
9 80200 97 21000 144000 198 77100 280000 394 298000
10 80400 98 21300 147000 210 83200 264000 323 230000
 
11 79700 97 20900 197000 305 167000 249000 269 181000
12 79000 96 20400 278000 607 462000 234000 238 151000
13 78600 82 17500 327000 959 848000 225000 213 129000
14 77400 95 19900 327000 1160 1020000 216000 184 107000
15 81100 117 25600 308000 858 715000 206000 177 98800
 
16 89000 109 26100 291000 633 497000 216000 187 109000
17 96400 121 31700 275000 496 368000 255000 220 153000
18 103000 141 39000 262000 434 307000 321000 355 311000
19 102000 142 38900 248000 395 265000 386000 714 753000
20 103000 146 40500 236000 300 191000 420000 1380 1570000
 
21 105000 128 36200 226000 273 166000 425000 1330 1520000
22 105000 123 34700 218000 239 140000 414000 1080 1210000
23 107000 147 42400 207000 218 122000 395000 843 900000
24 108000 120 35100 197000 222 118000 375000 682 692000
25 107000 113 32600 225000 294 179000 359000 578 561000
 
26 104000 104 29200 340000 477 450000 351000 515 488000
27 98100 99 26100 430000 924 1080000 348000 496 466000
28 93700 103 26200 478000 1170 1510000 346000 478 447000
29 90200 91 22100 --- --- --- 337000 508 462000
30 89400 92 22100 --- --- --- 322000 472 412000
 
31 110000 126 38200 --- --- --- 302000 396 323000
 
APRIL MAY JUNE
1 284000 358 275000 414000 289 323000 346000 302 282000
2 269000 323 235000 418000 276 312000 342000 273 252000
3 262000 309 219000 421000 312 355000 345000 277 261000
4 269000 297 215000 423000 276 315000 368000 342 342000
5 270000 251 183000 422000 269 307000 399000 541 585000
 
6 288000 264 205000 419000 235 266000 435000 --- e813000
7 312000 340 287000 417000 240 270000 471000 --- e1060000
8 319000 375 323000 418000 259 292000 509000 --- e1420000
9 309000 401 335000 426000 268 308000 546000 --- e1810000
10 301000 346 281000 439000 321 382000 578000 --- e2100000
 
11 301000 319 259000 456000 534 659000 599000 --- e1840000
12 309000 358 299000 467000 820 1030000 612000 --- e1410000
13 335000 533 484000 464000 846 1060000 613000 612 1010000
14 361000 704 687000 460000 705 876000 590000 511 814000
15 372000 752 756000 461000 556 692000 562000 466 708000
 
16 376000 718 730000 471000 507 644000 524000 446 631000
17 383000 685 709000 475000 531 681000 486000 398 522000
18 392000 672 711000 482000 498 647000 453000 376 460000
19 396000 652 697000 501000 507 681000 443000 410 490000
20 396000 654 700000 507000 498 680000 446000 600 723000
 
21 396000 592 633000 516000 471 657000 447000 788 951000
22 395000 513 547000 528000 441 630000 433000 909 1060000
23 395000 463 494000 536000 446 645000 415000 810 909000
24 398000 427 460000 530000 417 597000 420000 801 910000
25 402000 361 391000 516000 331 461000 438000 1090 1290000
 
26 408000 399 440000 497000 304 407000 449000 1250 1510000
27 412000 426 474000 471000 292 372000 448000 1100 1340000
28 415000 417 468000 442000 275 328000 439000 889 1060000
29 416000 369 413000 409000 270 299000 423000 750 858000
30 414000 337 377000 378000 322 331000 400000 574 621000
 
31 --- --- --- 358000 337 326000 --- --- ---
 
JULY AUGUST SEPTEMBER
1 381000 478 492000 193000 255 133000 139000 161 60300
2 365000 407 401000 189000 221 113000 138000 141 52900
3 351000 349 330000 199000 192 103000 132000 135 48100
4 346000 311 290000 201000 203 110000 119000 145 46600
5 337000 278 253000 187000 226 114000 109000 142 41900
 
6 329000 259 230000 176000 231 110000 108000 130 38000
7 329000 218 193000 172000 224 104000 108000 128 37200
8 331000 220 197000 169000 194 88400 105000 128 36200
9 329000 232 206000 167000 162 73100 104000 128 36100
10 314000 252 213000 164000 145 64200 109000 151 44600
 
11 296000 285 228000 163000 141 62000 110000 191 56800
12 279000 271 204000 161000 134 58200 106000 139 39700
13 e264000 212 150000 152000 132 54300 107000 122 35000
14 e250000 178 120000 142000 128 49400 113000 120 36600
15 e236000 168 107000 133000 122 44000 118000 111 35500
 
16 e227000 153 94100 119000 128 41100 118000 109 34600
17 223000 156 93200 103000 126 35100 119000 111 35500
18 212000 235 134000 98900 139 37200 118000 117 37200
19 221000 525 315000 99300 149 40000 112000 137 41400
20 221000 533 319000 104000 137 38400 106000 162 46200
 
21 204000 382 211000 105000 122 34400 104000 167 46700
22 194000 254 133000 104000 110 30900 111000 135 40200
23 189000 203 104000 103000 108 30000 148000 152 61200
24 183000 166 82200 104000 105 29600 172000 229 107000
25 184000 156 77600 117000 112 35300 169000 327 150000
 
26 191000 220 113000 143000 130 50100 158000 323 137000
27 187000 246 124000 141000 153 58300 147000 317 126000
28 182000 203 99600 129000 131 45600 138000 285 106000
29 190000 235 120000 122000 115 37900 135000 232 84400
30 205000 245 136000 121000 107 35000 138000 192 71200
 
31 204000 243 134000 130000 121 42700 --- --- ---
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data