Results
| Country: | Brasil
| | Station: | Ponte Quebra Linha | | River: | Maranhao | | Area: | 11008 km2 | | Lat: | -14.98 | | Lon: | -48.72 | | Source: | ANEEL | | PointID: | 94 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1966 | | Ending Year: | 1984 | | Total Years: | 19 | | Total Usable Years: | 18 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1966 | 451 | 380 | 316 | 247 | 191 | 129 | 179 | 192 | 166 | 270 | 273 | 522 | 276.33 |
| 1967 | 539 | 733 | 733 | 620 | 373 | 268 | 192 | 147 | 138 | 157 | 285 | 537 | 393.5 |
| 1968 | 433 | 829 | 1237 | 626 | 372 | 264 | 198 | 162 | 154 | 218 | 373 | 818 | 473.67 |
| 1969 | 553 | 1074 | 898 | 473 | 368 | 265 | 186 | 148 | 131 | 166 | 642 | 879 | 481.92 |
| 1970 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1971 | 293 | 315 | 407 | 383 | 209 | 163 | 123 | 106 | 100 | 211 | 647 | 713 | 305.83 |
| 1972 | 504 | 550 | 636 | 563 | 315 | 222 | 175 | 143 | 124 | 285 | 477 | 1129 | 426.92 |
| 1973 | 753 | 754 | 1038 | 947 | 515 | 361 | 266 | 203 | 170 | 455 | 602 | 651 | 559.58 |
| 1974 | 550 | 492 | 1073 | 948 | 579 | 383 | 282 | 213 | 174 | 219 | 287 | 396 | 466.33 |
| 1975 | 445 | 627 | 418 | 597 | 314 | 219 | 169 | 133 | 109 | 215 | 306 | 329 | 323.42 |
| 1976 | 315 | 505 | 630 | 395 | 286 | 187 | 143 | 125 | 147 | 178 | 524 | 888 | 360.25 |
| 1977 | 1079 | 1469 | 636 | 625 | 429 | 338 | 235 | 184 | 181 | 227 | 298 | 633 | 527.83 |
| 1978 | 1461 | 1068 | 1497 | 787 | 500 | 390 | 307 | 231 | 193 | 273 | 337 | -9999 | -9999 |
| 1979 | -9999 | 2172 | 1226 | 848 | 549 | 446 | 336 | 267 | 268 | 237 | 370 | 387 | -9999 |
| 1980 | 1537 | 2992 | 1493 | 1002 | 662 | 497 | 393 | 306 | 297 | 248 | 444 | 1003 | 906.17 |
| 1981 | 1187 | 729 | 956 | 940 | 595 | 449 | 341 | 267 | 212 | 360 | 728 | 599 | 613.58 |
| 1982 | 1822 | 1094 | 1240 | 926 | 606 | 348 | 297 | 311 | 316 | 384 | 393 | 459 | 683 |
| 1983 | 1239 | 2535 | 1132 | 844 | 621 | 481 | 388 | 295 | 271 | 331 | 500 | 974 | 800.92 |
| 1984 | 730 | 569 | 680 | 800 | 425 | 296 | 234 | 211 | 237 | 272 | 258 | 371 | 423.58 |
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| Avg | 817.12 | 1049.28 | 902.56 | 698.39 | 439.39 | 317 | 246.89 | 202.44 | 188.22 | 261.44 | 430.22 | 664 | 501.43 |
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| Std Dev | 460.25 |
745.79 |
353.89 |
221.07 |
141.28 |
107.84 |
80.69 |
63.33 |
63.37 |
76.47 |
143.75 |
240.11 |
171.27 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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