| Station: | Porto Formoso | Continent: | South America | ||
| River: | Parnaiba | Major Basin : | Atlantic Ocean | ||
| Country: | Brazil | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1976 - 1981 | Total Months: | 72 | ||
| Latitude (dec deg): | 3.43 S | Area (km2): | 282000 | ||
| Longitude (dec deg): | 42.4 W | Elevation (m): | 20 | ||
| Annual Discharge: (m3/s): | 839.3 | (km3/yr): | 26.4 | ||
| Annual Runoff: (l/s/km2): | 3.0 | (mm/yr): | 93.8 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 1041.8 | 1592.3 | 1804.5 | 1388.8 | 1028.2 | 466.3 | 375.3 | 336.0 | 344.7 | 448.0 | 636.8 | 657.2 |
| km3/mo | 2.8 | 3.9 | 4.8 | 3.6 | 2.8 | 1.2 | 1.0 | 0.9 | 0.9 | 1.2 | 1.7 | 1.8 |
| mm/mo | 9.9 | 13.7 | 17.1 | 12.8 | 9.8 | 4.3 | 3.6 | 3.2 | 3.2 | 4.3 | 5.9 | 6.2 |
| l/s/km2 | 3.7 | 5.6 | 6.4 | 4.9 | 3.6 | 1.7 | 1.3 | 1.2 | 1.2 | 1.6 | 2.3 | 2.3 |
