A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The effect of seasonal rainfall on landslides in the highlands of Ethiopia
Abstract In the densely populated highland area of Ethiopia, where altitudes exceed 1750 m, the increase in the number and size of landslides during the last 30 years is causing considerable concern among the society. From 1993 to 1998 alone, about 300 lives have been lost, more than 200 houses demolished, greater than 100 km of road damaged and in excess of 500 ha of land devastated. The paper discusses the relation between the mechanism of landslides and rainfall. A formula is suggested which could help in assessing the problems of instability. An $ L_{f} $ factor, determined mainly from the ratio between the cumulative precipitation and the mean annual rainfall, is proposed to indicate the likelihood of occurrence of failure. It is shown that cracks and signs of slope movement are observed when $ L_{f} $ is in the range of 15–30%, while values exceeding 30% indicate a much greater probability of landslide occurrence.
The effect of seasonal rainfall on landslides in the highlands of Ethiopia
Abstract In the densely populated highland area of Ethiopia, where altitudes exceed 1750 m, the increase in the number and size of landslides during the last 30 years is causing considerable concern among the society. From 1993 to 1998 alone, about 300 lives have been lost, more than 200 houses demolished, greater than 100 km of road damaged and in excess of 500 ha of land devastated. The paper discusses the relation between the mechanism of landslides and rainfall. A formula is suggested which could help in assessing the problems of instability. An $ L_{f} $ factor, determined mainly from the ratio between the cumulative precipitation and the mean annual rainfall, is proposed to indicate the likelihood of occurrence of failure. It is shown that cracks and signs of slope movement are observed when $ L_{f} $ is in the range of 15–30%, while values exceeding 30% indicate a much greater probability of landslide occurrence.
The effect of seasonal rainfall on landslides in the highlands of Ethiopia
Ayalew, L. (author)
1999
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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