, Volume 23, Issue 1, pp 7–17 | Cite as

Sediment yield in South Africa — A preliminary geographical analysis

  • Boucher Kim 
  • Weaver Alex van Breda 
Soil Erosion and Host Materials in Africa


The study examines the spatial relationships between sediment yield and 15 independent environmental variables in 54 catchments in South Africa. Rooseboom's (1978) data on the sediment yield from the catchments were standardized for a single time period. Bivariate regression analyses reveal no simple relationships. Multivariate regression analyses conducted for the whole and various sub-areas of South Africa indicate that latitude and longitude are the primary variables affecting spatial variations in sediment yield. This may be as a result of latitude and longitude being surrogate variables reflecting variation in other environmental variables (e. g. geology, vegetation). Within the sub-areas, 43.4% to 97.8% of the variation in sediment yield is explained by the combined variation in a number of different environmental variables. This study highlights a need for the collection and analysis of more sediment yield data, which would allow the analyses to be refined, to predict sediment yields from ungauged catchments in South Africa.


Regression Analysis Environmental Variable Yield Data Multivariate Regression Spatial Relationship 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Boucher Kim 
    • 1
  • Weaver Alex van Breda 
    • 1
  1. 1.Department of GeographyRhodes UniversityGrahamstownSouth Africa

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