Modeling Experiment of Break of Debris-Flow Dam  

作　　者：CHENG Zunlan GENG Xueyong DANG Chao LIU Jingjing 

机构地区：[1]Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences / Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China [2]2nd Institute of Design and Research, Ministry of Nucleus Industry, Beijing 100840, China

出　　处：《Wuhan University Journal of Natural Sciences》2007年第4期588-594,共7页武汉大学学报（自然科学英文版）

基　　金：the National Natural Science Foundation of China(40371016) ;the West Transportation Construction Science and Tech-nology Project of Ministry of Communications (2006 31879284)

摘　　要：Glaciers are extensively developed in the southwest of Tibet and the moraines are widely distributed with large depth. Large-scale debris flows are often reported which blocked rivers and formed dams. In this paper, seven large debris flows in four valleys are discussed, among which five dams developed. 13 sets of experiments have been conducted in laboratory to simulate the formation and failure of the dam. Finally, a model of dam failure is proposed and a formula is established to calculate the flood discharge： Q=kbnnk/TB^-/LG^0.1,where bk is the outlet width of the dam at the original water level, hk the erosive depth, T the time from overflow to final state of failure, the average width of lake; L the length of the lake, and G the total potential energy of the water in the lake.Glaciers are extensively developed in the southwest of Tibet and the moraines are widely distributed with large depth. Large-scale debris flows are often reported which blocked rivers and formed dams. In this paper, seven large debris flows in four valleys are discussed, among which five dams developed. 13 sets of experiments have been conducted in laboratory to simulate the formation and failure of the dam. Finally, a model of dam failure is proposed and a formula is established to calculate the flood discharge： Q=kbnnk/TB^-/LG^0.1,where bk is the outlet width of the dam at the original water level, hk the erosive depth, T the time from overflow to final state of failure, the average width of lake; L the length of the lake, and G the total potential energy of the water in the lake.

关 键 词：debris-flow dam OUTBURST EXPERIMENT 

分 类 号：P642.23[天文地球—工程地质学]