| RHP |
South African
River Health Programme |
Ecological State of the Major Rivers of Mpumalanga |
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Level II Ecoregions |
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| Main Attributes | Ecoregion 6.01 |
| Main Rivers | Olifants |
| Terrain morphology: Broad division | Closed hills, moderate relief |
| Vegetation types | Lebombo arid mountain bushveld |
| Altitude (m a.m.s.l) | 200-300; 100-200 |
| Geology | Basalt, tuff, breccia, rhyolite |
| Soils | Shallow, acidic sandy soils (lithosols) |
| Mean annual precipitation (mm) | 400-600; 600-800 (limited); 800-100 (limited) |
| CV (%) of annual precipitation | 20-25 (limited); 25-30; 30-35 |
| Rainfall concentration index (%) | 60-65; >65 |
| Rainfall seasonality | Midsummer (peak January) |
| Mean annual temperature ( ºC) | >22 |
| Range of median annual runoff (mm) for quaternary catchments (natural, simulated)* |
40-60; 60-80; 80-100 (limited) |
| CV (%) of annual simulated runoff for quaternary catchments | 60-70; 70-80; 80-90; 90-100 |
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After: Schulze et al. 1997; Low & Rebelo 1996; van Riet et al. 1997
* Based on ACRU model (Schulze et al. 1997) |
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