| Summary: | Main goal of this investigation is to present a mechanism, terrain shaping of a certain slope during the sliding process, in time history, up to its final form. It means that except slope material movement what is the slope composed, in time of slope occurrence is emphasized becoming of a new terrain form as a result of the process itself, too. This way of investigation definitively opens a new approach in a terrain relief form prediction depends on terrain characteristics and expecting weather occurrence. Here is analyzed a process of land crumbing and sliding on a Neogene slope at Ubilci place (part of urban area of Smederevo city), which was triggered by humane activities (undercutting of slope) and weather influence (rainy period). To present continuity flow of the slope material movement, it is used extended distinct element method. Profile line of the terrain surface which is obtained by numerical analyzes is in very good agreement with the finale profile line of the slope where a real case of crumbing and soil sliding has occurred. .
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