Results
| Country: | Brazil
| | Station: | PortoNacional | | River: | Tocantins | | Area: | 175359 km2 | | Lat: | -10.7 | | Lon: | -48.43 | | Source: | RivDIS | | PointID: | 1142 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1976 | | Ending Year: | 1979 | | Total Years: | 4 | | Total Usable Years: | 3 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1976 | 1501 | 2380 | 3009 | 1781 | 1223 | 745 | 547 | 451 | 485 | 898 | 2035 | 3311 | 1530.5 |
| 1977 | 3839 | 8168 | 2734 | 2680 | 1815 | 1153 | 806 | 621 | 561 | 949 | 1080 | 2850 | 2271.33 |
| 1978 | 7634 | 7667 | 9476 | -9999 | -9999 | 1822 | 1305 | 955 | -9999 | 1217 | 3008 | -9999 | -9999 |
| 1979 | 8337 | 12371 | 5994 | 4089 | 2169 | 1585 | 1182 | 930 | 976 | 981 | 1880 | 1993 | 3540.58 |
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| Avg | 5327.75 | 7646.5 | 5303.25 | 2850 | 1735.67 | 1326.25 | 960 | 739.25 | 674 | 1011.25 | 2000.75 | 2718 | 2447.47 |
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| Std Dev | 2794.4 |
3547.16 |
2727.34 |
949.87 |
390.26 |
412.49 |
301.08 |
212.13 |
215.79 |
122.42 |
685.22 |
546.11 |
830.01 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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