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. |
SEDIMENT: August 1980 to current year. |
DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES |
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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 |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |