Landslide dam failure and prediction of flood/debris flow hydrograph

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Conference Proceeding

Publication Title

Prediction and Simulation Methods for Geohazard Mitigation - Proceedings of the International Symposium on Prediction and Simulation Methods for Geohazard Mitigation, IS-KYOTO 2009


The formation and failure of landslide dam are common geomorphic process in the mountainous area all over the world. Landslide dams may fail by erosion due to overtopping, abrupt collapse of the dam body or progressive failure. The prediction of outflow hydrograph and flood routing is essential to mitigate downstream hazards. This study is focused on prediction of landslide dam failure due to sliding and overtopping and prediction of outflow hydrograph. A stability model coupled with a transient seepage flow model is further integrated with dam surface erosion and flow model. The main advantage of an integrated model is that it can detect failure mode and flood/debris flow hydrograph due to either overtopping or sliding based on initial and boundary conditions. The proposed model is tested for three different experimental cases of landslide dam failure and reasonably reproduced the resulting flood/debris flow hydrograph. © 2009 Taylor & Francis Group.

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