摘要
2008年汶川大地震后,泥石流灾害表现活跃,至今经历了多个暴雨过程,那么如何才能较为准确地分析泥石流源区演变特征。首要是确定泥石流源区崩滑体体积。本文选择映秀镇附近,岷江沿岸的5条泥石流沟为研究对象,针对泥石流源区崩滑体体积难以确定的问题,野外调查研究区内167个崩滑体点,建立崩滑体体积与面积间的关系模型,并通过野外调查研究区内48个崩滑点进行验证。定量解译研究区3期航空影像的物源面积,利用崩滑体体积估算模型,进一步分析研究区泥石流物源的演变特征。
After the 2008 Wenchuan Earthquake,debris flow disasters were strong.So far,many rainfall processes had happened.How can we accurate analyze the accumulation evolution of debris flow.We should make sure the volume of sources.In order to solve the question,5 debris flow gullies were chosen along Minjiang River as a research area near Yingxiu.First,using field survey,we got the volume and area of 167 sources.Then analysising the relationship between the volume and area,we got the volume model.Last,we verified the model by 48 sources. Through the remote sensing interpretation,combining with volume model,this paper expounds debris flow source activity in the studied area.
出处
《工程地质学报》
CSCD
北大核心
2016年第1期73-77,共5页
Journal of Engineering Geology
基金
中国地质调查局项目(12120113009900)资助
关键词
泥石流
崩滑体
物源估算模型
遥感解译
演变特征
Debris flow
Sources
The volume model of sources
Remote sensing
Accumulation evolution
