中国地质灾害与防治学报2025，Vol.36Issue(6)：82-94,13.DOI:10.16031/j.cnki.issn.1003-8035.202412023
云南兰坪县练登沟泥石流发育演化特征及成灾动力学过程模拟
Development and evolution characteristics of debris flow and simulation of its catastrophic dynamic process in Liandeng gully,Lanping County,Yunnan Province
摘要
Abstract
Liandeng gully has historically experienced frequent debris flow disasters that often causes casualties,traffic disruptions,and river blockages.Based on field investigations and remote sensing interpretation,this study investigates the morphological changes in the gully,the characteristics of sediment sources,and the evolution patterns of debris flow.Using numerical simulation,the dynamic behavior of debris flow under various rainfall return periods was analyzed.The results indicate that debris flow initiation zones are concentrated at tributaries No.2,4,and 5 on the left side of the main gully,where channels have widened over time and material sources continue to accumulate.Under the rainfall frequencies of once every 10,20,50,and 100 years,debris flow disasters exhibit similar progression,with peak flow velocities at the gully outlet reaching 1.57 m/s,2.01 m/s,2.48 m/s,and 2.98 m/s,and debris volumes of 26 400 m3,51 700 m3,115 600 m3,and 187 600 m3,respectively.Under the 10-year return period rainfall scenario,debris flows can bury roads and block rivers,forming dammed lakes.In view of the characteristics of debris flow in Liandeng gully,comprehensive mitigation and control measures are recommended,including source stabilization,channel bed reinforcement,barriers,and diversion works.The findings provide scitific supoprt for the study of high-frequency debris flow development and evolution,and serves as a reference for local disaster prevention and mitigation projects.关键词
练登沟/泥石流/成灾特征/遥感解译/数值模拟Key words
Liandeng gully/debris flow/disaster characteristics/remote sensing interpretation/numerical simulation分类
天文与地球科学引用本文复制引用
刘刚,胡卸文,周永豪,何坤,刘文连,眭素刚..云南兰坪县练登沟泥石流发育演化特征及成灾动力学过程模拟[J].中国地质灾害与防治学报,2025,36(6):82-94,13.基金项目
国家自然科学基金青年科学基金项目(42407212) （42407212）
