Author(s): Tamotsu Takahashi; Hajime Nakagawa
Linked Author(s): Tamotsu Takahashi, Hajime Nakagawa
Keywords: No Keywords
Abstract: Landslides sometimes produce the natural dams. When the ravine choked is very steep, failure of the dam generates a debris flow and results in a severe sediment hazard. A large scale landslide can block even a big valley and majority of thus produced natural dams fail catastrophically causing major flooding and loss of life. Preparation of the countermeasures for such kinds of disaster necessitates the knowledge how to predict when, where and what characteristic natural dam will be formed, if it may fail, what time is it after forming, and what phenomena will be produced as the consequence of failure. The heterogeneity of the inside structure and diversity in the form and scale of the dam, however, seem to have discouraged from theoretical treatment of the phenomena and the existing studies mainly treat individual dam-failure events or induce some important quantities by using data of the hitherto events (1).
Year: 1993