Evaluation of Load against Embankment Due to Debris Flow Flooded into Agricultural Reservoir Stored Water

Abstract

Agricultural reservoirs were damaged by debris flow at torrential rain in Japan. In this study, the model experiment is conducted to evaluate the load against the embankment. Based on the actual damage case due to debris flow, the peak inflow of sand assumed debris flow is set in this experiment. The load against the embankment is measured under the different condition of distance from slope to embankment and the impounded water. The measured load and calculated fluid force are compared. As the result, acting load is reduced as the distance is large from embankment to slope due to the large volume of debris flow. Especially, the effect is large without water. The evaluation method of fluid force could be proposed for the embankment of the agricultural reservoir.