A Study of the Outburst form of the End-Moraine Lake in Tibet
详细信息
- 责任者：Liu Jingjing (Key Laboratory of Mountain Hazards and Surface Process ; Chinese Academy of Sciences ; Chengdu 610041 ; China) ; Cheng Zunlan
- 刊名：Earth Science Frontiers
- 出版年：2009
- 卷期：16(4)
- 关键词：冰川湖 ; glacial lake ; 次生灾害 ; derived disasters ; 西藏 ; Tibet
- 页码：p.372-380
- 图表：10 illus., 4 tables, 30 refs.
- 分类号：1800
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
In this paper, the end-moraine dam is considered as a natural dam and the outburst of end-moraine lake is researched in terms of hydraulics and soil mechanics. According to field observations and previous researches, the study focuses on the overflow and piping-break types of outburst. It is found that the dyke breach in the overflow type usually has the shape of an arc or a trapezoid. From the field observations, the authors found a relationship between the height and the open width of the breach. Almost all end-moraine lakes collapse partially. Based on field surveys and sampling analysis, the authors determined the possible ways of collapse of the Guangxieco end-moraine lake by infiltration.