【作者】 蒋忠信；

【Author】 Jiang Zhongxin The No.2 Survey and Design Institute of Railway,Chengdu 610031 Institute of Mountain Hazards and Environment,the Chinese Academy of Scinces,Chengdu 610041

【机构】 铁道第二勘察设计院；

【摘要】 冰碛湖溃决洪水与泥石流可造成严重灾害。为预测冰碛湖溃决和防治溃决灾害,根据试验资料归纳出仅依赖于水深H和粒径d的非均匀沙起动流速经验公式,进而以d₉₆作为终碛堤物质的起动粒径,将导致溃决的临界漫溢水头高度（H₀）公式改进为:H₀=23.6 d₉₆^0.583/[10^{（0.833b/B）}（B/b）^0.694]。以西藏帕隆藏布米堆沟光谢错溃决为例进行了验证。更多还原

【Abstract】 Flood water and debris flow caused by glacial lake burst can be a serious disaster. For predicting burstof moraine lake and controlling burst hazard, based on experiment data, induced a empirical formula calculatingthreshold flow velocity of non-uniform sand, which is only function of grain size d and water depth H. Then, withd₉₆ of terminal moraine dyke as threshold size, calculation formula of critical height （H₀） of overflow head causingto moraine lake burst was improved to H₀ =23.6 d₉₆^0.583/[10^{（0.833b/B）} （B/b）^0.694]. With burst of Guangxie-cuo lakein Midui valley of Pologzangbu river in Tibet as a example, the burst critical overflow condition was inspected.更多还原