Landslides, including debris flow, debris avalanche, and rockfall, cause severe damages worldwide. Our mission is to clarify the mechanism of landslides and develop these prediction methods. We mainly study the following topics.
1. Clarification of debris flow development mechanisms
Debris flows are one of the most hazardous landslide types because of their high flow velocity, impact forces, and long-runout. They commonly gain much of their mass and destructive power by entraining material as they descend steep slopes and channels. However, the mechanisms of such debris flow development remain unclear. We thus try to clarify these mechanisms through flume experiments that simulate debris flow development processes, allowing us to develop prediction techniques of a debris flow.
2. Clarification of landslide dam failure mechanisms
Heavy rainfall and strong earthquakes can cause large-scale landslides, blocking a river valley and forming a landslide dam. Its dam failure triggers an enormous flood flow, resulting in catastrophic damages downstream. Our laboratory conducts flume experiments on landslide dam failure processes and develops numerical simulation methods for predicting flood scales caused by a landslide dam failure.