聂拉木县冲堆普2002年泥石流成因分析及防治对策

聂拉木县冲堆普于2002年5月23日和6月29日先后两次暴发了大规模泥石流灾害,导致下游的水电站、中尼公路、农牧业生产、通讯设施等遭受严重破坏,总共损失约750余万元,给地方社会经济造成了严重的影响.通过对上游的考察和气象资料分析,查清了灾害的形成原因是冲堆普上游冰川融水和嘉龙湖局部溃决所诱发.这是一种多因子共同作用的新型泥石流类型,不同于以往的冰川融水型泥石流和冰湖溃决型泥石流.针对泥石流的危害,提出了防治措施,包括软性措施和硬性措施.

Debris Flows of Chongdui Gully in Nyalam County,2002: Cause and Control

Two large-scale debris flows burst out in Chongdui Gully of Nyalam County on May 23 and June 29,2002,causing tremendous disasters to the hydropower station,the China-Nepal highway,communication establishment,and farming and stockbreeding,and resulting economic loss of above 7.5 million Yuan.Investigation to the upstream of the gully and analysis of the climate data demonstrate that these two debris flows were caused by glacial meltwater and moraine-dammed lake outburst.The contribution of the glacial meltwater accounted for about 74%,and that of moraine-dammed lake outburst accounted for only 26% of the maximum discharge.In order to control debris flows,many countermeasures have been present,including civil and plant measures,as well as efficient management.