| Station: | Porto Nacional | Continent: | South America | ||
| River: | Tocantins | Major Basin : | Atlantic Ocean | ||
| Country: | Brazil | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1976 - 1979 | Total Months: | 44 | ||
| Latitude (dec deg): | 10.7 S | Area (km2): | 175359 | ||
| Longitude (dec deg): | 48.43 W | Elevation (m): | |||
| Annual Discharge: (m3/s): | 2721.2 | (km3/yr): | 83.8 | ||
| Annual Runoff: (l/s/km2): | 15.2 | (mm/yr): | 477.9 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 5327.8 | 7599.9 | 5303.2 | 2850.0 | 1735.7 | 1326.2 | 960.0 | 739.2 | 674.0 | 1011.2 | 2000.8 | 2718.0 |
| km3/mo | 14.3 | 18.4 | 14.2 | 7.4 | 4.6 | 3.4 | 2.6 | 2.0 | 1.7 | 2.7 | 5.2 | 7.3 |
| mm/mo | 81.4 | 104.8 | 81.0 | 42.1 | 26.5 | 19.6 | 14.7 | 11.3 | 10.0 | 15.4 | 29.6 | 41.5 |
| l/s/km2 | 30.4 | 43.3 | 30.2 | 16.3 | 9.9 | 7.6 | 5.5 | 4.2 | 3.8 | 5.8 | 11.4 | 15.5 |
