Results
| Country: | Brasil
| | Station: | Tupiratins | | River: | Tocantins | | Area: | 243841 km2 | | Lat: | -8.23 | | Lon: | -48.1 | | Source: | ANEEL | | PointID: | 53 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1969 | | Ending Year: | 1997 | | Total Years: | 29 | | Total Usable Years: | 27 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1969 | 780 | 844 | 980 | 921 | 503 | 399 | 323 | 304 | 851 | 966 | 2135 | 5146 | 1179.33 |
| 1970 | 8954 | 7394 | 9235 | 4746 | 2576 | 1669 | 1266 | 1024 | 936 | 1399 | 2715 | 2327 | 3686.75 |
| 1971 | 2074 | 2393 | 3099 | 3935 | 2079 | 1254 | 915 | 760 | 699 | 1133 | 3315 | 4714 | 2197.5 |
| 1972 | 3082 | 4059 | 4851 | 4142 | 1928 | 1338 | 1019 | 865 | 761 | 1180 | 1801 | 4560 | 2465.5 |
| 1973 | 4574 | 4215 | 5642 | 5928 | 2759 | 1679 | 1294 | 1024 | 854 | 1915 | 3103 | 4950 | 3161.42 |
| 1974 | 4492 | 5680 | 9576 | 9029 | 5470 | 2654 | 1808 | 1407 | 1176 | 1545 | 2471 | 3349 | 4054.75 |
| 1975 | 4335 | 6109 | 5236 | 6679 | 2959 | 1822 | 1440 | 1091 | 907 | 1279 | 2326 | 2711 | 3074.5 |
| 1976 | 2841 | 4370 | 4965 | 3642 | 2509 | 1490 | 1069 | 874 | 876 | 1638 | 2979 | 4560 | 2651.08 |
| 1977 | 5092 | 10509 | 4469 | 4632 | 3946 | 2085 | 1459 | 1144 | 1043 | 1584 | 1951 | 3880 | 3482.83 |
| 1978 | 9483 | 9331 | 12320 | 6971 | 4118 | 2715 | 1908 | 1473 | 1244 | 1605 | 1740 | 4005 | 4742.75 |
| 1979 | 10143 | 15730 | 8777 | 6132 | 3343 | 2285 | 1727 | 1410 | 1438 | 1566 | 2645 | 2799 | 4832.92 |
| 1980 | 7884 | 18406 | -9999 | -9999 | 3369 | 2303 | 1804 | 1479 | 1339 | 1367 | 2644 | 7031 | -9999 |
| 1981 | 9153 | 5970 | 6725 | 7866 | 3136 | 2387 | 1742 | 1416 | 1157 | 1614 | 4758 | 4126 | 4170.83 |
| 1982 | 12989 | 9674 | 7960 | 5942 | 3142 | 2211 | 1521 | 1384 | 1340 | 1571 | 1841 | 2036 | 4300.92 |
| 1983 | 5377 | -9999 | -9999 | -9999 | 2617 | 1896 | 1475 | 1223 | 1086 | 1418 | 2217 | 4916 | -9999 |
| 1984 | 4634 | 3515 | 4581 | 5784 | 2664 | 1625 | 1211 | 1001 | 1026 | 1245 | 1495 | 2023 | 2567 |
| 1985 | 6678 | 8725 | 7034 | 7022 | 4010 | 2264 | 1656 | 1277 | 1064 | 1722 | 2825 | 6445 | 4226.83 |
| 1986 | 11488 | 8385 | 7184 | 5468 | 3700 | 2220 | 1692 | 1376 | 1092 | 1633 | 1710 | 2379 | 4027.25 |
| 1987 | 3330 | 3071 | 5755 | 5379 | 2564 | 1472 | 1112 | 934 | 827 | 1090 | 1899 | 5446 | 2739.92 |
| 1988 | 5766 | 5762 | 8707 | 5580 | 3174 | 1961 | 1374 | 1059 | 859 | 1204 | 1814 | 5080 | 3528.33 |
| 1989 | 4908 | 4883 | 5591 | 4687 | 3409 | 1770 | 1297 | 1009 | 916 | 1041 | 2707 | 12514 | 3727.67 |
| 1990 | -9999 | -9999 | 6796 | 4506 | 3078 | 1949 | 1518 | 1143 | 1167 | 1153 | 1424 | 2222 | -9999 |
| 1991 | 4894 | 5686 | 6793 | 7457 | 3360 | 1832 | -9999 | -9999 | -9999 | 1126 | 2161 | 3320 | -9999 |
| 1992 | 5702 | 13782 | 5428 | 5106 | 2938 | 1844 | -9999 | -9999 | -9999 | -9999 | 2829 | 7819 | -9999 |
| 1993 | 5965 | 6050 | 5097 | 3959 | 2490 | -9999 | 1122 | 897 | 868 | 1141 | 1077 | 2546 | -9999 |
| 1994 | 5857 | 5173 | 8957 | 6305 | 2675 | 1810 | 1392 | 1017 | 801 | 806 | 1396 | 2977 | 3263.83 |
| 1995 | 4423 | 6309 | 5118 | 7607 | 5202 | 2460 | 1519 | 1091 | 868 | 977 | 1747 | 4522 | 3486.92 |
| 1996 | 5133 | 3520 | 4618 | 4558 | 2761 | 1674 | 1164 | 936 | 786 | 1159 | 1715 | 1957 | 2498.42 |
| 1997 | 4896 | 4069 | 8135 | 7950 | 3745 | 1828 | 1253 | 892 | 796 | 871 | 1077 | 2017 | 3127.42 |
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| Avg | 5890.25 | 6800.52 | 6430.7 | 5627.15 | 3111.17 | 1889.14 | 1373.33 | 1092.96 | 991.74 | 1319.57 | 2224.72 | 4219.9 | 3356.29 |
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| Std Dev | 2777.98 |
3981.25 |
2275.18 |
1659.84 |
928.78 |
465.73 |
331.12 |
259.02 |
194.76 |
279.19 |
759.76 |
2198.73 |
858.57 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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