Abstract
The objective of this research is to improve prediction performance of a distributed rainfall and sediment runoff model for better reservoir sedimentation management. This paper describes an advanced slope-failure simulation method base on basin geomorphology using distributed-parameter rainfall and sediment runoff model, which considers rain-factor and physically-based slope stability. The proposed method is applied to the three dam catchements: Yahagi Dam (504.5 km2), Miwa Dam (311.1km2), and Koshibu Dam (288.0km2), in Chubu, Japan. At each catchment, the model shows very good prediction results of slope failures, which is in good agreement with the locations of actual slope failures recognized by a detailed areal photo interpretation.
