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The present report represents the 1st outcome of research project “The optimization of forest management strategies on slopes endangered by landslides and rock falling – a methodology for forest-planting practices”. Submitted report is search of published and unpublished data relating to geomorphological, geological and landscape aspects of origin as well as distribution of the landslides and rock falling to the forest management.

In this study, in order to study the dynamic behavior of rock keeping concrete walls under impact loading, prototype impact test is performed by striking a steel weight against the walls. Here, the height and width of wall aer taken as experimental variables which are 1, 2 and 3 m in height and 1 and 2 m in width. In this study, two types of loading aer applied which are an iterative loading with an increment of about 1 m/see impact velocity and a single loading with the maximum impact velocity at the iterative loading. An elasto-plastic dynamic response analysis is also performed to consider an applicability of FEM numerical analysis on this type of impact problems. The results obtained from this study are as follws: 1) the failure mode of wall depends upon the height of loading point: a bending-shear type of failure for a heigher loading point and a pure shear failure for a lower one; 2) the effective width of wall for simple design procedure should be taken as unit length (1m); and 3) a proposed numerical analysis method can be applied to this type of impact problems.