Other studies also conclude that lithology and precipitation are Triggering factors, depending on the characteristic conditions at the Setting state either tectonics, climate, or anthropogenic activity as being In general, ongoingĭiscussions on the formation of slope instabilities in an active rift Unclear and a matter of current debate (e.g. However, the influence of other factors on slope instabilities is Tectonics in several studies (Ayalew and Yamagishi, 2004 Ayalew et al.,Ģ004). Geomorphic indices have been used to decipher links between landform and Links between these factors and the formation of landslides and Weathering, climatic conditions, vegetation cover, land use, and humanĪctivity.
Rock fabric anisotropy, active tectonics and seismicity, type and grade of Slope instabilities, including mainly landslides, rockfalls, and debris flowsĪre usually influenced by key factors such as slope, bedrock lithology and Landslide formation the main triggers here are intense precipitation and Unfavourable lithological conditions, is the main predisposition for Regional uplift,Īccompanied by rapid headward erosion forming steep slopes together with Landslide occurrence is strongly influenced by steep erosional slopes and aĭeeply weathered Proterozoic metamorphic basement. Uplifting Ethiopian Plateau 60 km east of the Great Rift Valley shows that Predisposition for landslide formation here, and the main triggers are Active faulting forming steep slopes is the main
Landslides here areĬlosely associated with steep, mostly faulted, slopes and a higher density Similar affinities as in a regional study of MER. Rockfalls and landslide areas typically occur on areas with bushland,Ī detailed study on active rift escarpment in the Arba Minch area revealed Deforestation is also an important predisposition because Higher annual precipitation, precipitation seasonality, vegetation density,Īnd seasonality. The formation and polyphase reactivation of faults in theĬhanging regional stress field significantly increase the rocks' tectonicĪnisotropy, slope, and the risk of slope instabilities forming.Īccording to geostatistical analysis, areas prone to landslides in theĬentral and southern MER occur on steep slopes, almost exclusively formed on active normal fault escarpments. Presumed contribution of the NNE(NE)–SSW(SW) extension controlled by theĪrabian Plate. Morphotectonic data from central Main Ethiopian Rift (CMER) and southern Main Ethiopian Rift (SMER) support a model of progressive change in the regional extension from NW–SE to the recent E(ENE)–W(WSW)ĭirection, driven by the African and Somali plates moving apart with the Geomorphology, and climate on landslide formation. Prospective area to study the influence of tectonics, lithology, Rifting creates specific conditions for landslide formation, provides a The Main Ethiopian Rift (MER), where active continental
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