地质通报2025，Vol.44Issue(2)：377-391,15.DOI:10.12097/gbc.2023.08.008
金沙江流域泥石流危险性评价
Hazard assessment of debris flow in Jinsha River
摘要
Abstract
[Objective]This study investigates the distribution characteristics of debris flow in Jinsha River and conducts a hazard assessment to provide data support and a scientific basis for understanding regional variations in debris flow and disaster prevention in the Hengduan Mountain area.[Methods]Based on the field investigation and GIS spatial analysis,2551 debris flows in the Jinsha River were identified.Hazard assessment was performed based on the activity characteristics of these debris flows.Using ROC analysis and spatial clustering,the debris flow hazard zoning in the Jinsha River was established.[Results]①Debris flows in the upper reaches of Jinsha River are not active,predominantly of low to medium frequency,while high-frequency debris flows are concentrated in the lower reaches,especially between Yarmou and Qiaojia.②The primary factors influencing debris flow formation include slopes ranging from 15°to 35°,frequent seismic activity,and the presence of both soft and hard clastic rocks.③Medium-and high-hazard debris flows cover 47.48%of the area,nearly half of the studied region.④The high-hazard zone in the Dongchuan-Qiaojia section shows high concentration,closely correlating with active faults and abundant sediment supply,largely controlled by tectonic activity.[Conclusions]High-hazard debris flow zones are concentrated in the downstream of Jinsha River.The hazard zoning map provides a reference for risk mitigation in hydropower development and transportation infrastructure planning.关键词
泥石流/危险性/活动特征/金沙江流域Key words
debris flow/hazard/activity characteristics/Jinsha River分类
天文与地球科学引用本文复制引用
孙聿卿,葛永刚,陈兴长,曾璐,梁馨月,冯鑫..金沙江流域泥石流危险性评价[J].地质通报,2025,44(2):377-391,15.基金项目
国家自然科学基金青年基金项目《金沙江上游地区构造控制型大滑坡发育特征及易发性定量评价方法》(批准号:42001012)、第二次青藏高原综合科学考察研究《重大泥石流灾害及风险专题》(编号:2019QZKK0902) （批准号:42001012）
