Results
| Country: | Brasil
| | Station: | Tucurui | | River: | Tocantins | | Area: | 758000 km2 | | Lat: | -3.75 | | Lon: | -49.68 | | Source: | ANEEL | | PointID: | 56 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1978 | | Ending Year: | 1995 | | Total Years: | 18 | | Total Usable Years: | 17 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1978 | 20758 | 21960 | 36785 | 27944 | 19599 | 9488 | 4916 | 3474 | 2648 | 2721 | 3314 | 6068 | 13306.2 |
| 1979 | 15478 | 37152 | 35632 | 26881 | 15153 | 6749 | 4034 | 3058 | 3102 | 3277 | 4729 | 5649 | 13407.8 |
| 1980 | 14061 | 33866 | 48927 | 34109 | 15410 | 7396 | 4562 | 3439 | 2939 | 3080 | 4117 | 9818 | 15143.7 |
| 1981 | 19325 | 21881 | 18798 | 24891 | 13626 | 6714 | 4055 | 3040 | 2522 | 2578 | 5751 | 10122 | 11108.6 |
| 1982 | 18972 | 31086 | 28812 | 26286 | 15864 | 8008 | 4453 | 3186 | 2807 | 3211 | 3481 | 3799 | 12497.1 |
| 1983 | 8412 | 26307 | 22534 | 24629 | 12526 | 6120 | 3870 | 2907 | 2359 | 2661 | 4262 | 8901 | 10457.3 |
| 1984 | 12332 | 13068 | 15018 | 21662 | 15475 | 6219 | 3554 | 2488 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1985 | 10098 | 24595 | 26101 | 32383 | 22939 | 9593 | 4772 | 3381 | 2785 | 3543 | 5653 | 10807 | 13054.2 |
| 1986 | 26901 | 24555 | 27375 | 23517 | 15517 | 7342 | 4405 | 3460 | 3109 | 3282 | 4485 | 6730 | 12556.5 |
| 1987 | 7215 | 9197 | 17081 | 19069 | 9782 | 4636 | 3357 | 3271 | 3155 | 3128 | 3246 | 4841 | 7331.5 |
| 1988 | 12367 | 14874 | 22925 | 24325 | 16883 | 6942 | 4644 | 4161 | 4037 | 4106 | 4021 | 9913 | 10766.5 |
| 1989 | 14796 | 16771 | 21839 | 26498 | 20389 | 8414 | 5234 | 4194 | 4149 | 4194 | 5134 | 17830 | 12453.5 |
| 1990 | 33689 | 22900 | 28214 | 22934 | 12594 | 6756 | 4726 | 3724 | 4165 | 4417 | 4429 | 4575 | 12760.2 |
| 1991 | 10144 | 17671 | 21030 | 27107 | 21056 | 9035 | 5011 | 4593 | 4656 | 4594 | 4607 | 4974 | 11206.5 |
| 1992 | 10069 | 28355 | 24029 | 23855 | 13919 | 6641 | 4404 | 3552 | 4319 | 4163 | 3853 | 11370 | 11544.1 |
| 1993 | 15932 | 18095 | 20539 | 17607 | 11168 | 4874 | 3714 | 3013 | 3618 | 3600 | 4488 | 4705 | 9279.42 |
| 1994 | 14414 | 22436 | 30298 | 23750 | 14582 | 7461 | 4894 | 4203 | 4617 | 4060 | 4724 | 4954 | 11699.4 |
| 1995 | 13185 | 22697 | 22501 | 27118 | 23517 | 11638 | 5437 | 4887 | 4943 | 5177 | 4912 | 9797 | 12984.1 |
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| Avg | 15452.7 | 22637 | 26024.3 | 25253.6 | 16111.1 | 7445.89 | 4446.78 | 3557.28 | 3525.29 | 3634.82 | 4423.88 | 7932.53 | 11856.3 |
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| Std Dev | 6457.14 |
6972.75 |
7921.02 |
3889.27 |
3816.95 |
1671.97 |
565.51 |
610.83 |
812.14 |
719.94 |
701.09 |
3521.52 |
1739.85 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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