Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Outburst Flood of the 2000 Yigong Landslide Dam Based on Limited Information
A super large rock avalanche occurred along Zhamu Creek, southeast Tibet on April 9, 2000, and triggered the Yigong landslide dam. The dam with a height of 60 m, a length of 2500 m, a width of 2500 m and a lake volume of 2.015 Gm3, threatened life and property both downstream and upstream. This paper reports a rapid assessment method for dam breaching with limited geometric and hydrological information of landslide dams. The method can be divided into three steps: first, Google map was used to obtain regional DEM data; second, Global Mapper was used to analyze the regional DEM data and obtain the river channel profiles; third, the HEC-RAS 4.1 was used to simulate the outburst discharge and flood evolution process. The results show that the excavation of spillway can decrease the dam breach peak discharge and control the life and property risk. The present method can be used for breach flood assessment of sudden unexpected landslide dams and providing a scientific basis for decision making in landslide dams risk management.
The Outburst Flood of the 2000 Yigong Landslide Dam Based on Limited Information
A super large rock avalanche occurred along Zhamu Creek, southeast Tibet on April 9, 2000, and triggered the Yigong landslide dam. The dam with a height of 60 m, a length of 2500 m, a width of 2500 m and a lake volume of 2.015 Gm3, threatened life and property both downstream and upstream. This paper reports a rapid assessment method for dam breaching with limited geometric and hydrological information of landslide dams. The method can be divided into three steps: first, Google map was used to obtain regional DEM data; second, Global Mapper was used to analyze the regional DEM data and obtain the river channel profiles; third, the HEC-RAS 4.1 was used to simulate the outburst discharge and flood evolution process. The results show that the excavation of spillway can decrease the dam breach peak discharge and control the life and property risk. The present method can be used for breach flood assessment of sudden unexpected landslide dams and providing a scientific basis for decision making in landslide dams risk management.
The Outburst Flood of the 2000 Yigong Landslide Dam Based on Limited Information
Springer Ser.Geomech.,Geoengineer.
Zhang, Jian-Min (Herausgeber:in) / Zhang, Limin (Herausgeber:in) / Wang, Rui (Herausgeber:in) / Shen, Danyi (Autor:in) / Shi, Zhenming (Autor:in) / Peng, Ming (Autor:in)
The International Conference on Embankment Dams ; 2020 ; Beijing, China
21.04.2020
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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