泸定县岚安乡昂乌村三岔沟泥石流特征与形成机制研究

Study on Characteristics and Formation Mechanism of Sanchagou Debris Flow in Angwu Village,LAN'an Township,Luding County

2020~2021年泸定县岚安乡昂乌村三岔沟连续爆发三次泥石流灾害,泥石流给当地村民造成严重的经济损失。本文通过野外调查、无人机航拍、历史影像搜集、现场实验等手段,对该沟连续爆发三次泥石流灾害的泥石流特征、成因机制及运动特征等进行了详细研究,系统分析了暴雨诱发高频泥石流的在时间、空间上的形成机理,为认识暴雨诱发高频泥石流的形成机理与未来演化趋势研判提供科学依据。

From 2020 to 2021,three consecutive debris flow disasters broke out in Sancha Ditch,Angwu Village,LAN'an Township,Luding County,causing serious economic losses to local villagers.By means of field investigation,UAV aerial photography,historical image collection,field experiment and other means,this paper makes a detailed study on the characteristics,genetic mechanism and movement characteristics of the debris flow of the three consecutive debris flow disasters in the ditch,and systematically analyzes the formation mechanism of high-frequency debris flow induced by rainstorms in time and space.It provides scientific basis for understanding the formation mechanism and future evolution trend of high-frequency debris flow induced by heavy rainfall.