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长江上游雅砻江右岸曾发生了土方数量达６８００万ｍ３的滑坡，滑坡体在江中形成一天然坝，坝高１７５ｍ，相应库容６．８亿ｍ３。由于库水漫过坝顶引起的溃坝过程历时１３小时，坝址下游６ｋｍ麻河的溃坝洪峰流量达５３０００ｍ３／ｓ。据此对下游河段的溃坝洪水过程及坝体的溃决过程进行了分析。
Landslides of earthquakes amounting to 68 million m3 have occurred on the right bank of the Yalong River in the upper reaches of the Yangtze River. The landslide body forms a natural dam in the river with a height of 175 m and a corresponding reservoir capacity of 680 million m3. The process of dam breakage caused by the overflow of reservoir water over the crest of a dam lasted 13 hours, and the peak discharge of dam breakage of Mahe at 6 km downstream of the dam reached 53000 m3 / s. Based on this, the process of dam break flood and dam break process in the downstream reaches were analyzed.