Results
| Country: | Brasil
| | Station: | Porto dos Gauchos | | River: | Arinos | | Area: | 36207 km2 | | Lat: | -11.65 | | Lon: | -57.23 | | Source: | ANEEL | | PointID: | 34 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1973 | | Ending Year: | 1994 | | Total Years: | 22 | | Total Usable Years: | 22 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1973 | 140427 | 157435 | 191732 | 178280 | 212977 | 221718 | 199201 | 163860 | 117002 | 578 | 948 | 1166 | 132110 |
| 1974 | 1230 | 1376 | 1471 | 1415 | 1237 | 944 | 544 | 400 | 379 | 465 | 520 | 688 | 889.08 |
| 1975 | 915 | 1175 | 1017 | 1072 | 777 | 475 | 447 | 389 | 359 | 375 | 512 | 759 | 689.33 |
| 1976 | 752 | 887 | 1011 | 831 | 715 | 535 | 425 | 378 | 367 | 471 | 506 | 641 | 626.58 |
| 1977 | 917 | 1111 | 943 | 891 | 768 | 656 | 489 | 420 | 435 | 535 | 699 | 893 | 729.75 |
| 1978 | 1323 | 1119 | 1382 | 1031 | 993 | 786 | 661 | 495 | 476 | 560 | 688 | 881 | 866.25 |
| 1979 | 1317 | 1609 | 1702 | 1564 | 1333 | 995 | 617 | 556 | 527 | 563 | 652 | 696 | 1010.92 |
| 1980 | 1163 | 1588 | 1700 | 1252 | 860 | 691 | 588 | 494 | 494 | 528 | 595 | 947 | 908.33 |
| 1981 | 1359 | 1348 | 1389 | 1286 | 863 | 684 | 553 | 483 | 440 | 515 | 798 | 810 | 877.33 |
| 1982 | 1182 | 1330 | 1359 | 1181 | 819 | 651 | 538 | 480 | 534 | 551 | 578 | 664 | 822.25 |
| 1983 | 952 | 1103 | 990 | 902 | 614 | 541 | 432 | 395 | 381 | 497 | 686 | 825 | 693.17 |
| 1984 | 745 | 721 | 892 | 959 | 728 | 561 | 430 | 389 | 418 | 449 | 547 | 489 | 610.67 |
| 1985 | 973 | 1076 | 1188 | 1059 | 787 | 549 | 470 | 409 | 413 | 489 | 560 | 622 | 716.25 |
| 1986 | 895 | 1203 | 1207 | 991 | 999 | 636 | 412 | 418 | 456 | 509 | 467 | 600 | 732.75 |
| 1987 | 780 | 844 | 872 | 842 | 614 | 462 | 394 | 362 | 345 | 347 | 520 | 860 | 603.5 |
| 1988 | 959 | 1121 | 1308 | 1119 | 776 | 597 | 476 | 418 | 391 | 425 | 546 | 807 | 745.25 |
| 1989 | 910 | 986 | 998 | 1034 | 862 | 639 | 558 | 484 | 412 | 476 | 582 | 949 | 740.83 |
| 1990 | 1253 | 1212 | 1395 | 980 | 717 | 548 | 488 | 423 | 477 | 498 | 591 | 696 | 773.17 |
| 1991 | 1057 | 1269 | 1357 | 1430 | 966 | 619 | 525 | 452 | 475 | 545 | 683 | 765 | 845.25 |
| 1992 | 946 | 1275 | 1415 | 1153 | 780 | 605 | 499 | 414 | 333 | 442 | 665 | 947 | 789.5 |
| 1993 | 1008 | 1106 | 1102 | 937 | 628 | 490 | 445 | 387 | 357 | 451 | 585 | 719 | 684.58 |
| 1994 | 762 | 681 | 1162 | 1020 | 641 | 487 | 492 | 433 | 344 | 341 | 382 | 651 | 616.33 |
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| Avg | 7355.68 | 8253.41 | 9890.55 | 9146.77 | 10475.2 | 10675.9 | 9531.09 | 7860.86 | 5718.86 | 482.27 | 605 | 776.14 | 6730.97 |
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| Std Dev | 29039.2 |
32554.9 |
39681.8 |
36908.4 |
44189.9 |
46053.4 |
41389.4 |
34041.8 |
24284 |
65.63 |
117.08 |
148.39 |
27360.2 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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