水土保持研究2018，Vol.25Issue(3)：205-209,5.
都江堰龙溪河流域典型泥石流物源演化特征遥感监测
Dynamic Evolution Characteristics of Material of Typical Debris Flow Using Remote Sensing Technology, in Lonngxi Catchment, Dujiangyan,China
摘要
Abstract
After ‘5 · 12’ Wenchuan Earthquake,the massive loose solid matters were produced in Longxi River,Dujiangyan,which provides the rich materials for debris flows.On 14thAugust,2010,debris flows occurred in five valleys,which thrust in farmland and jammed the Longxi River diversions,threatened the old Longchi town.In order to research the dynamic evolution of source,we selected five debris flows as study examples and five high precision image covering the study areas,compared the evolution characters of the valleys by ArcGIS.The results indicated that:before‘5 · 12’earthquake,the study area cover was good,geologic hazards were not found,the basin stream all belonged to the clear ditch;after ‘5 · 12’ Earthquake,the number of landslide was 283 and the area was 41.28 hm2;after ‘8 · 13’ debris flow event,the number of landslide was 47 and the area was 8.29 hm2 due to rainfall,surface runoff scouer erosion,expansion and new generation of partial collapse and the landslide.After five periods of high resolution remote sensing interpretation of the landslides,the growth rates of landslides were declining year by year,the ecological environment gradually recovered.关键词
汶川地震/泥石流/滑坡/动态演变/遥感监测Key words
Wenchuan Earthquake/debris flow/landslides/dynamic evolution/remote sensing monitoring分类
天文与地球科学引用本文复制引用
姚维益,常鸣,李为乐..都江堰龙溪河流域典型泥石流物源演化特征遥感监测[J].水土保持研究,2018,25(3):205-209,5.基金项目
四川省地理国情与资源环境承载力监测工程技术研究中心项目(GC201505) （GC201505）
地质灾害防治与地质环境保护国家重点实验室自由探索课题(SKLGP2014Z004) （SKLGP2014Z004）
成都理工大学中青年骨干教师培养计划(JXGG201507) （JXGG201507）
