基于DEM的全国集水区提取及在泥石流孕险分析中的应用  

The Extraction of Catchment Based on DEM and the Application to Prevention of Debris Flow

作　　者：顾学云[1] 王茜[2] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]国家基础地理信息中心,北京100830

出　　处：《测绘与空间地理信息》2013年第3期34-36,40,共4页Geomatics & Spatial Information Technology

基　　金：中国重大自然灾害风险等级综合评估技术研究分析;国家科技支撑计划项目(2008BAK50B01)资助

摘　　要：3S技术的发展给水文科学带来了新的机遇。基于DEM的水文特征提取技术已经比较成熟,本文从自然灾害防治的角度出发,将基于DEM的流域提取技术应用到泥石流的防治工作中去,重点分析并确定了泥石流发生的流域范围,针对相应集水范围提取了全国范围的集水区边界数据。The development of 3S technology has brought a lot of new opportunities for other fields.This paper introduced a new typical application in hydrogrical science.It is a brief and highly efficienct method to extract catchment based on DEM.This paper introduced this method in deta,specifically from five aspects(base principles,data processing,direction of flow,etc.).Then,we talk about it from the point of view of the prevention of natural disasters,in particular,about how this method could be applied to the prevention and control of the debris flow.Specifically,about the precondition for debris flow happening,detailed steps of the extraction of catchment based on 25m DEM data has been discussed.

关 键 词：DEM 流域 集水区 泥石流 

分 类 号：P2[天文地球—测绘科学与技术]