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Representative landslide phenomena in western Greece induced by heavy rainfalls, in terms of the geological composition and structure of the affected materials, are thoroughly studied and analyzed. The studied cases involved composite landslides on weathered mantle of flysch and Neogene marls that constitute the most critical landslide prone geological formations in Greece. Their shear strength characteristics were determined from back analyses while low-cost remedial measures, focused on surface and groundwater control, were designed. The effective contribution of the finally constructed works on ground stabilization was systematically monitored by surface and subsurface measurements of ground displacements during a time period after their construction.