Disaster risk assessment of typical debris flows in Dechang County of Sichuan
Xilin Liu, Zhao Yuan, Xiuzhen Li, Huayong Ni, Pengcheng Su · Ziran zaihai xuebao · 2006
Hupiwan,Liangfeng and Aomiluo gullies in Dechang Country of Sichuan are three typical debris flow gullies entering the Cida River.The hazard degrees of debris flow gullies are 0.49,0.65 and 0.45 respectively;the vulnerability degrees are 0.79,0.82 and 0.81 respectively;the risks are separately 0.39,0.53 and 0.37 belonging in high risk debris flow gullies and being easy to cause large debris flow disaster losses.Being in continuing high-intensity rainstorm,the debris flows broke out in three gullies on Aug.24,2004, and resulted in large losses.The paper establishes debris flow loss assessment,and serves the loss assessment of the three debris flow disasters.Furthermore,aiming at the high risk gullies,the paper gives prevention advices so as to mitigate and control the debris flow disasters in the future.