Journal
ENGINEERING GEOLOGY
Volume 71, Issue 3-4, Pages 255-264Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0013-7952(03)00137-6
Keywords
instability; Central Rif; hydrodynamics; geologic structure; rupture model
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The northern edge of the Central Rif (Morocco) is subject to numerous landslides where mechanisms do not correspond to the classical models used by geomechanics specialists. It is necessary to adopt a multidisciplinary approach that combines geomorphology, geology, hydrogeology, and geotechnics in order to understand how such slope failures are generated, especially in a region with a heterogeneous structure characterised by significant lithological differences, severe fracturing, and thrust sheets where tectonic contacts play a major role in groundwater circulation. This report shows that these failures are essentially controlled by the tectonic contact separating the Tisirene and Chouamat thrust sheets and by subsurface hydrodynamic conditions. A model of spatial and temporal variations in the factor of safety is proposed. (C) 2003 Elsevier Science B.V. All rights reserved.
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