The research area is located in the right Kampar sub-watershed that crosses Riau and West Sumatra provinces. The result of the delineation process has formed 44 sub-watersheds with a total area of 447,221.10 ha. From the results of the study obtained 12 types of land closures, 5 types of land with a slope level of 0-25%. This study aims to analyze the effect of land cover changes on surface flo…