ABSTRACT
National Resources Conservation Service (NRCS) developed for estimation of the effective rainfall from soil characteristics and land use condition in the ungaged basin. NRCS model has the highest suitability level among analytic infiltration models. Rainfall intensity was applied as a rainfall factor for slope and this is permeated all of the rainfall in slope, excessive groundwater level can be lead to wrong estimation. NRCS model was applied to calculate the amount of infiltration by analysis sections and it is necessary to study groundwater level based on time changes. Resisting powers for collapse reduced and stability of slope was fallen extremely. Therefore, if rainfall characteristics are applied rationally for stability analysis of slope, slope-related disasters can be forecasted and considered in advance. The amount of infiltration, computed by rainfall, has achieved in different aspects. The change of groundwater level was observed be using the amount of infiltration for NRCS model after 120 hours.
