| Station: | Vioolsdrif | Continent: | Africa | ||
| River: | Orange | Major Basin : | Orange | ||
| Country: | South Africa | Discharge into : | Atlantic Ocean | ||
| Observation Period: | 1964 - 1986 | Total Months: | 242 | ||
| Latitude (dec deg): | 28.71 S | Area (km2): | 850530 | ||
| Longitude (dec deg): | 17.51 E | Elevation (m): | |||
| Annual Discharge: (m3/s): | 145.6 | (km3/yr): | 4.6 | ||
| Annual Runoff: (l/s/km2): | 0.2 | (mm/yr): | 5.4 |
| Mean for Observation Period | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| m3/sec | 164.0 | 318.1 | 202.7 | 217.5 | 126.0 | 131.4 | 102.9 | 86.5 | 73.2 | 84.4 | 122.3 | 123.7 |
| km3/mo | 0.4 | 0.8 | 0.5 | 0.6 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 |
| mm/mo | 0.5 | 0.9 | 0.6 | 0.7 | 0.4 | 0.4 | 0.3 | 0.3 | 0.2 | 0.3 | 0.4 | 0.4 |
| l/s/km2 | 0.2 | 0.4 | 0.2 | 0.3 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
