Soil erosion in the Tigray highlands (Ethiopia). I. Natural and human environment in its relationship to soil erosion
1995
Nyssen, J. (Liege Univ. (Belgium). Dept. de Geographie Physique)
The impact of natural and human phenomena on soil erosion in Dega Tembien (Central Tigray, Ethiopia) is studied. Steep slopes and intensive rainfall occurring during seedtime, as well as deforestation are the main direct causes. Even armos, the traditional anti-erosive vegetative barriers, have often been destroyed. Semi-natural vegetation was removed by the smallholder peasant society in a bid to increase immediate agricultural output in response to famines and impoverishment (which find its origins in share-cropping, priority to export crops, stagnating techniques, often imposed wars, ...). The relationships between poverty, soil erosion and demography are approached. This paper prepares for a forthcoming one, dealing with a quantitative approach of soil erosion, as well as soil and water conservation in Dega Tembien.
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