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USGS Surface-Water Daily Statistics for Louisiana

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 07381490 Atchafalaya River at Simmesport, LA


Avoyelles Parish, Louisiana
Hydrologic Unit Code 08080101
Latitude  30°58'57", Longitude  91°47'54" NAD83
Drainage area 87,570.00  square miles
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2009-10-01 -> 2021-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 261,000 293,000 298,000 389,000 347,000 384,000 268,000 208,000 142,000 130,000 145,000 176,000
2 268,000 291,000 304,000 386,000 345,000 381,000 268,000 204,000 141,000 125,000 146,000 177,000
3 275,000 290,000 309,000 387,000 345,000 377,000 268,000 201,000 139,000 126,000 145,000 178,000
4 279,000 292,000 315,000 385,000 347,000 372,000 269,000 199,000 138,000 124,000 140,000 180,000
5 281,000 291,000 320,000 382,000 352,000 369,000 270,000 197,000 137,000 124,000 138,000 182,000
6 281,000 288,000 322,000 378,000 357,000 364,000 269,000 194,000 136,000 125,000 140,000 185,000
7 283,000 287,000 326,000 377,000 362,000 361,000 269,000 190,000 134,000 123,000 142,000 189,000
8 285,000 286,000 331,000 377,000 368,000 357,000 271,000 188,000 132,000 122,000 147,000 191,000
9 287,000 284,000 338,000 375,000 373,000 353,000 272,000 189,000 130,000 123,000 150,000 196,000
10 294,000 283,000 347,000 372,000 377,000 350,000 271,000 187,000 129,000 128,000 150,000 202,000
11 298,000 286,000 353,000 370,000 382,000 347,000 273,000 183,000 129,000 132,000 150,000 208,000
12 298,000 290,000 357,000 370,000 384,000 341,000 273,000 181,000 128,000 132,000 151,000 211,000
13 295,000 292,000 364,000 370,000 385,000 337,000 271,000 180,000 128,000 133,000 175,000 213,000
14 293,000 295,000 370,000 369,000 387,000 334,000 271,000 177,000 127,000 134,000 174,000 218,000
15 292,000 298,000 375,000 365,000 391,000 332,000 271,000 172,000 128,000 135,000 175,000 225,000
16 290,000 298,000 378,000 363,000 394,000 326,000 270,000 166,000 128,000 135,000 173,000 228,000
17 290,000 297,000 382,000 361,000 396,000 322,000 267,000 163,000 127,000 137,000 171,000 231,000
18 289,000 298,000 383,000 359,000 395,000 319,000 266,000 162,000 127,000 140,000 169,000 231,000
19 286,000 299,000 385,000 359,000 397,000 314,000 263,000 162,000 124,000 140,000 170,000 236,000
20 283,000 296,000 386,000 361,000 398,000 307,000 259,000 160,000 125,000 140,000 171,000 238,000
21 283,000 294,000 388,000 360,000 399,000 301,000 252,000 160,000 128,000 140,000 169,000 239,000
22 285,000 295,000 393,000 360,000 401,000 298,000 249,000 158,000 130,000 139,000 168,000 239,000
23 287,000 291,000 392,000 362,000 400,000 296,000 246,000 156,000 131,000 140,000 168,000 238,000
24 288,000 286,000 392,000 362,000 398,000 291,000 241,000 153,000 131,000 140,000 167,000 236,000
25 290,000 284,000 393,000 360,000 396,000 287,000 238,000 150,000 131,000 141,000 166,000 236,000
26 293,000 287,000 394,000 358,000 396,000 285,000 233,000 147,000 132,000 143,000 168,000 239,000
27 295,000 290,000 391,000 355,000 395,000 281,000 228,000 146,000 132,000 146,000 171,000 240,000
28 295,000 294,000 390,000 352,000 395,000 277,000 224,000 145,000 132,000 142,000 173,000 245,000
29 294,000 335,000 392,000 349,000 394,000 272,000 221,000 142,000 132,000 139,000 174,000 246,000
30 293,000   393,000 347,000 391,000 268,000 217,000 141,000 133,000 138,000 176,000 251,000
31 294,000   393,000   388,000   212,000 141,000   138,000   255,000