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Abstract Serious geological disasters occurred worldwide at an alarming rate resulting in large number of landslide dams. Owing to lack of the detailed data，the studies of the characteristics and the burst of the landslide dams have been rather limited. Moreover，it is often very difficult to obtain the detailed data of landslide dams，since the life spans of landslide dams are rather short and the survey of landslide dams is normally arduous. Therefore，an efficient model of dam burst with limited parameters is urgently demanded for the risk assessment and the mitigation of landslide dams. A database with 1 298 landslide dams from all over the world was compiled. The characteristics of landslide dams including the locations，the triggers，the life spans，the failure modes，the dam heights，the lake volumes and the causes of landslide dams were analyzed based on the database. A dam burst model was established to estimate the burst parameters(the peak discharge，the burst size and burst time) based on 41 cases with the detailed information in the database. The model was applied to Tangjiashan landslide dam. Finally，comparison was made between the model for landslide dams and the one for man-made earth and rockfill dams and finding was made that using the models for man-made earth and rockfill dams to assess the landslide dams would over estimated the danger and resulted in a very conservative decision leading to unnecessary high economic cost.
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Received: 21 April 2014
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2014, Vol. 33 
