| 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 5.06 |
| Main Rivers | Selati, Olifants, Klaserie, Timbavati |
| Terrain morphology: Broad division | Plains, moderate relief |
| Vegetation types | Sweet lowveld bushveld |
| Altitude (m a.m.s.l) | 400-600; 300-400 |
| Geology | Iron, jaspilite, syenite, hornblende granite, foskorite, gneiss, sandstone, shale, conglomerate |
| Soils | Shallow black, brown or red clayey soil, often with vertic properties |
| Mean annual precipitation (mm) | 400-600; 600-800 |
| CV (%) of annual precipitation | 25-30 (limited); 25-30; 30-35 |
| Rainfall concentration index (%) | 55-60;60-65;>65 |
| Rainfall seasonality | 1. Limited: Early summer (peak December or earlier)
2. Midsummer (peak January) |
| Mean annual temperature ( ºC) | 20-22 |
| Range of median annual runoff (mm) for quaternary catchments (natural, simulated)* |
10-20; 40-60; 60-80; 80-100; 100-150 |
| CV (%) of annual simulated runoff for quaternary catchments | 80-90; 90-100; 120-140 |
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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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