Debris Flow Dam Formation in Southea

Debris Flow Dam Formation in Southeast Tibet

Glaciers with their deposits abound in the alpine areas of Southeast Tibet. Large debris flows occur frequently from these deposits and form dams that block streams. In this paper, 3 events of large debris flows reported in Peilong Valley located in Southeast Tibet, and which resulted 2 blocking dams resulted, are discussed in details, focusing on the major factors controlling dam formation. The results shows that the first surge group caused by snow and ice avalanches, ice-lake breaks, and large-scale landslides, with a high peak discharge and high velocity, and an abundance of boulders, are most likely to form blocking dams.

作 者： CHENG Zunlan WU Jishan GENG Xueyong   作者單位： Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, Sichuan 610041, China  刊 名： 山地科學學報（英文版）  SCI 英文刊名： JOURNAL OF MOUNTAIN SCIENCE  年，卷(期)： 2005 2(2)  分類號： P9  關鍵詞： Southeast Tibet   debris-flow dam   dam formation  

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