Analysis of debris flow control effect and hazard assessment in Xinqiao Gully,Wenchuan M_(s)8.0 earthquake area based on numerical simulation

作     者：Chang Yang Yong-bo Tie Xian-zheng Zhang Yan-feng Zhang Zhi-jie Ning Zong-liang Li 

作者机构：Chinese Academy of Geological SciencesBeijing 100037China Chengdu Center of China Geological SurveyChina Geological SurveyChengdu 610081China Technology innovation center for risk prevention and mitigation of geohazardMinistry of Natural ResourcesChengdu 611734China Observation and Research Station of Chengdu Geological HazardsMinistry of Natural ResourcesChengdu 610000China 

出 版 物：《China Geology》 (中国地质（英文）)

年 卷 期：2024年第7卷第2期

页      面：248-263页

核心收录：

学科分类：08[工学] 0708[理学-地球物理学] 0837[工学-安全科学与工程] 

基　　金：supported by the project of the China Geological Survey(No.DD20221746) the National Natural Science Foundation of China(Grant Nos.41101086)。 

主　　题：Landslide Debris flow Hazard assessment Numerical simulation OpenLISEM Prevention and control project Wenchuan M_(s)8.0 earthquake Xinqiao Gully Sichuan province Geological hazards survey engineering 

摘      要：Xinqiao Gully is located in the area of the 2008 Wenchuan M_(s)8.0 earthquake in Sichuan province,China.Based on the investigation of the 20236-26Xinqiao Gully debris flow event,this study assessed the effectiveness of the debris flow control project and evaluated the debris flow hazards.Through field investigation and numerical simulation methods,the indicators of flow intensity reduction rate and storage capacity fullness were proposed to quantify the effectiveness of the engineering measures in the debris flow event.The simulation results show that the debris flow control project reduced the flow intensity by41.05%to 64.61%.The storage capacity of the dam decreases gradually from upstream to the mouth of the gully,thus effectively intercepting and controlling the debris flow.By evaluating the debris flow of different recurrence intervals,further measures are recommended for managing debris flow events.