Evidence of Soil Erosion in South Africa (Grade 11 NSC Matric Geography): Flashcards
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SA regions most severely affected by soil erosion
SA regions most severely affected by soil erosion
Drier western regions
Location of Karoo erosion case study
Location of Karoo erosion case study
Klein Seekoei valley, north of Graaff-Reinet, Eastern Cape
Main causes of Karoo soil erosion
Main causes of Karoo soil erosion
Excessive grazing and intensive farming practices
Definition of 'simulate' in research
Definition of 'simulate' in research
Reproduce essential features as an aid to study
1940s aerial photos showed Karoo had
1940s aerial photos showed Karoo had
Extensive vegetation cover and active wheat cultivation
1990s aerial photos showed Karoo had become
1990s aerial photos showed Karoo had become
Virtually bare of vegetation and abandoned
Peak sediment rate in Dam 1 (1960-65)
Peak sediment rate in Dam 1 (1960-65)
Approx. 290 tonnes per km² per year
Sediment levels after sheep reduction
Sediment levels after sheep reduction
Remained elevated - long-term landscape damage
Most dam sediment consists of
Most dam sediment consists of
Valuable topsoil stripped from land surface
Erosion after farming stops & livestock reduced
Erosion after farming stops & livestock reduced
Continues - landscape struggles to recover naturally