Results
| Country: | Brazil
| | Station: | PortoVelho | | River: | Madeira | | Area: | 950582 km2 | | Lat: | -8.76 | | Lon: | -63.91 | | Source: | RivDIS | | PointID: | 504 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1969 | | Ending Year: | 1979 | | Total Years: | 11 | | Total Usable Years: | 11 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1969 | 20388 | 22887 | 22913 | 22088 | 14140 | 11286 | 7533 | 4611 | 3812 | 3971 | 6462 | 12584 | 12722.9 |
| 1970 | 15127 | 20216 | 25110 | 25097 | 21348 | 15646 | 9301 | 5547 | 4940 | 4936 | 6146 | 9108 | 13543.5 |
| 1971 | 18426 | 27513 | 30263 | 25493 | 17061 | 10095 | 7589 | 4841 | 4411 | 6767 | 9375 | 14745 | 14714.9 |
| 1972 | 19528 | 26360 | 32128 | 31870 | 22410 | 16341 | 9161 | 7870 | 10680 | 10648 | 10150 | 19608 | 18062.8 |
| 1973 | 22729 | 30370 | 34017 | 32977 | 25670 | 19487 | 12369 | 8208 | 6075 | 6354 | 11957 | 19287 | 19125 |
| 1974 | 27056 | 31980 | 37331 | 33339 | 27779 | 19407 | 12136 | 7582 | 5195 | 5834 | 11153 | 14069 | 19405.1 |
| 1975 | 21731 | 29957 | 34138 | 32254 | 24715 | 17310 | 13542 | 7354 | 5227 | 8250 | 9075 | 18201 | 18479.5 |
| 1976 | 28662 | 34334 | 35586 | 32949 | 25917 | 17474 | 9373 | 5340 | 4535 | 4845 | 8453 | 13099 | 18380.6 |
| 1977 | 24220 | 27946 | 36251 | 33266 | 27614 | 18617 | 11880 | 7532 | 5867 | 7484 | 14243 | 21248 | 19680.7 |
| 1978 | 28184 | 28695 | 36349 | 31710 | 24374 | 17303 | 12370 | 5970 | 3753 | 4590 | 9468 | 22348 | 18759.5 |
| 1979 | 29896 | 34818 | 36460 | 38975 | 33000 | 21487 | 11577 | 6377 | 5142 | 5261 | 6785 | 10913 | 20057.6 |
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| Avg | 23267.9 | 28643.3 | 32776.9 | 30910.7 | 24002.6 | 16768.4 | 10621 | 6475.64 | 5421.55 | 6267.27 | 9387.91 | 15928.2 | 17539.3 |
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| Std Dev | 4543.76 |
4237.13 |
4604.69 |
4565.24 |
4957.89 |
3263.38 |
1990.92 |
1229.31 |
1805.49 |
1857.2 |
2348.95 |
4212.69 |
2475.67 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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