Southern Africa, the land and its peoples . ationOf steej) slopes to the hate rock, in the dust-laden winds thatblow in dry weather, and in the formation of dongas or shuts. Running water is probably the most destructive agent. Much of the rainfall of South Africa occurs in the form of downpoursof almost tropical violence, whilst owing to the high altitude ofthe river-SOUrceS streams flow with ;i swift current. An examina-tion of eleven Karroo rivers during a Mood period showed that theaverage quantity of soil carried in suspension amounted to 161 lb. per hundred gallons. It is sometimes asser
Southern Africa, the land and its peoples . ationOf steej) slopes to the hate rock, in the dust-laden winds thatblow in dry weather, and in the formation of dongas or shuts. Running water is probably the most destructive agent. Much of the rainfall of South Africa occurs in the form of downpoursof almost tropical violence, whilst owing to the high altitude ofthe river-SOUrceS streams flow with ;i swift current. An examina-tion of eleven Karroo rivers during a Mood period showed that theaverage quantity of soil carried in suspension amounted to 161 lb. per hundred gallons. It is sometimes asserted that soil-erosion is iml of Serious consequence, because it merely enriches one region at the expense of another. While it is tine that water-hurnc soil may producerich alluvial Hats elsewhere, a Lreat deal is certainly carried to tin- sea and permanently lost, it is estimated that the soil washed 92 SOUTHKKN AlKICA annually into the sea by South African rivers would cover 91square miles 12 inches deep. J l RtinftU. <*$ ., „.— I. Vegetation retard* tk« flovu of u>*tet* and allowstkc toil to *b*orb moisture. 1 Rxiirkll. a Surf&ccftoUb Subsoil C Rock
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidsouthernafricala00hutc
