Results
| Country: | South_Africa
| | Station: | Outspan | | River: | Groot-Vis | | Area: | 29745 km2 | | Lat: | -33.24 | | Lon: | 26.99 | | Source: | RivDIS | | PointID: | 1521 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1969 | | Ending Year: | 1986 | | Total Years: | 18 | | Total Usable Years: | 12 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1969 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 0 | 0 | 0 | 0.01 | 1.04 | 0.09 | -9999 |
| 1970 | 0 | 1.23 | 0.19 | 0 | 0 | 0.08 | 0 | 18.6 | 9.12 | 3.82 | 0.62 | 33.9 | 5.63 |
| 1971 | 13.7 | 22.6 | 10.9 | 25.9 | 3.42 | 1.31 | 1.08 | 39.1 | 12.1 | 11.4 | 5.91 | 3.62 | 12.59 |
| 1972 | 3.36 | 5.99 | 14.5 | -9999 | 1.37 | 1.32 | 1.01 | 0.29 | 0.76 | 0.16 | 0.68 | 0.01 | -9999 |
| 1973 | 0 | 0.09 | 5.46 | 8.04 | 1.55 | 0.29 | -9999 | 0.15 | 0.25 | -9999 | 0.71 | -9999 | -9999 |
| 1974 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1975 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1976 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 |
| 1977 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 6.39 | -9999 | -9999 |
| 1978 | -9999 | 2.87 | 1.88 | 14.2 | 8.2 | -9999 | 7.14 | -9999 | 4.3 | -9999 | 5.31 | 3.65 | -9999 |
| 1979 | 3.91 | 2.34 | 8.87 | 4.62 | 3.35 | -9999 | 61.7 | 106 | 19.3 | 8.77 | 5.62 | -9999 | -9999 |
| 1980 | 2.82 | 4.18 | 5.4 | 3 | 2.95 | 2.88 | 3.37 | 3.58 | 3.33 | 3.78 | 4.54 | 10.9 | 4.23 |
| 1981 | 3.55 | 7.53 | 20.2 | 6.68 | 8.87 | 19 | 5.68 | 3.58 | 13.9 | 8.09 | 4.37 | 9.08 | 9.21 |
| 1982 | 3.51 | 3.28 | 4.62 | 4.2 | 5.63 | 5.18 | 8.8 | 5.02 | 3.98 | 2.33 | 2.96 | 1.39 | 4.24 |
| 1983 | 1.01 | 1.69 | 2.01 | 2.73 | 2.38 | 4.01 | 109 | 14.8 | 3.58 | 5.06 | 6.72 | 11.8 | 13.73 |
| 1984 | 9.3 | 1.58 | 3 | 5.24 | 4.39 | 5.47 | 3.93 | 4.05 | 4.32 | 3.23 | 1.66 | 2.52 | 4.06 |
| 1985 | 12.7 | 17.8 | 8.2 | 3.79 | 3.43 | 3.38 | 5.79 | -9999 | -9999 | 7.76 | 121 | -9999 | -9999 |
| 1986 | -9999 | -9999 | 6.09 | 2.94 | 7.29 | 5.14 | 3.17 | 3.18 | 2.41 | -9999 | -9999 | -9999 | -9999 |
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| Avg | 4.9 | 5.93 | 7.02 | 6.78 | 4.06 | 4.37 | 16.21 | 16.53 | 5.95 | 4.95 | 11.97 | 7.7 | 7.67 |
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| Std Dev | 4.59 |
6.75 |
5.37 |
6.68 |
2.61 |
4.99 |
31.02 |
29.05 |
5.67 |
3.49 |
30.32 |
9.65 |
3.86 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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