| Station: | Regua | Continent: | Europe | ||
| River: | Douro | Major Basin : | Atlantic Ocean | ||
| Country: | Portugal | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1933 - 1968 | Total Months: | 432 | ||
| Latitude (dec deg): | 41.15 N | Area (km2): | 91491 | ||
| Longitude (dec deg): | 7.68 W | Elevation (m): | 44 | ||
| Annual Discharge: (m3/s): | 541.4 | (km3/yr): | 17.1 | ||
| Annual Runoff: (l/s/km2): | 5.9 | (mm/yr): | 186.5 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 1039.7 | 1138.4 | 1055.9 | 792.1 | 501.9 | 277.7 | 138.9 | 108.6 | 126.1 | 191.3 | 458.8 | 703.6 |
| km3/mo | 2.8 | 2.8 | 2.8 | 2.1 | 1.3 | 0.7 | 0.4 | 0.3 | 0.3 | 0.5 | 1.2 | 1.9 |
| mm/mo | 30.4 | 30.1 | 30.9 | 22.4 | 14.7 | 7.9 | 4.1 | 3.2 | 3.6 | 5.6 | 13.0 | 20.6 |
| l/s/km2 | 11.4 | 12.4 | 11.5 | 8.7 | 5.5 | 3.0 | 1.5 | 1.2 | 1.4 | 2.1 | 5.0 | 7.7 |
