综合评价山洪灾害风险的GIS方法  

GIS way of synthetical evaluation of flash flood disaster risk

作　　者：詹小国[1] 祝国瑞[1] 文余源[1] 

机构地区：[1]武汉大学资源与环境科学学院

出　　处：《长江科学院院报》2003年第6期48-50,64,共4页Journal of Changjiang River Scientific Research Institute

基　　金：水利部引进国外农业先进技术项目 (9851 0 9)和中芬合作项目"长江防洪应急反应系统"资助

摘　　要：在地理信息系统软件ArcGIS的支持下,利用GRID模块地图代数功能,选取最大3d降雨量、集流面积、坡度和土地利用类型等指标,并考虑山洪引起滑坡泥石流和水土流失灾害等因素,采用层次分析法确定因子的权重,用加权平均法来评价山洪风险,并以三峡库区湖北片为例,评价了该地区的洪灾风险,经检验,证明其评价方法是符合实际的,操作也很简便。Supported by GIS software ArcGIS8.1, making use of the map algebra function of GRID module, choosing the maximal rainfall in three days, collecting area, slope and land use classes as asessment indexes, and considering the disaster factors such as landslide, debris flow, and water and soil loss, the paper adopts the AHP method to calculate the weight of factors and weighted average approach to evaluate the flash risk of a flood disaster. Through the examination of Three Gorges Reservoir Area in Hubei province, the method proposed accords with practice, and its operation is convenient.

关 键 词：山洪灾害 地理信息系统 GIS 滑坡 泥石流 水土流失 加权平均法 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P426.616[天文地球—测绘科学与技术]