REVIEW OF MODEL EXPERIMENTAL STUDIES ON BREAK OF LAND-SLIDE DAMS

Landslide dam are naturally formed dams with the characteristics of the loose structure, poor stability and strong permeability. Once a landslide dam is formed, its high probability of breaching and the flood caused by its breaching may threaten the safety of people and property in local area. Therefore, a systematic and comprehensive study needs to be conducted to analyze the breaching characteristics of landslide dam. In this article, a detail review from model experimental studies on dam break of landslide dam is conducted. The results and limitations are analyzed and summarized. Moreover, the factors of particle size distribution, compactness, water content and bed slope of single dam break are also analyzed. Finally we discuss the relationship among the dam break factor and the failure mode, the characteristics of dam breaching, peak discharge, and downcutting process. On the basis of the systematic analysis of the breaching of landslide dams, it's suggested that further studies of model similarity theory, scaling effect, testing methods and the disposal of landslide dam may be carried out in the future.