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A note on the areal distribution of suspended sediment yield in South Africa |
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| Authors: | J C Doornkamp P D Tyson |
| Institution: | a University of Nottingham, Nottingham, Great Britain b University of the Witwatersrand, Johannesburg, South Africa |
| Abstract: | Suspended sediment yield is calculated by means of Fournier's (1960) equations for 214 locations in South Africa. The areal distributions agree well with field data. Areas of pronounced relief yield most suspended sediment, especially from the Transvaal Escarpment zone, northeast Lesotho, the Natal Drakensburg and the Cape Mountains. Locally high values occur inland (e.g., Waterberg Plateau north of Nylstroom). Valley rainfall records inadequately define mountain precipitation leading to an underestimate of likely actual values of sediment yield in some areas. Man-induced soil erosion locally increases suspended sediment yields, as do areas of deeply weathered bedrock. |
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