延河流域加权信息量法地质灾害分区研究  

The Geological Hazards with Zoning Research Based on Weighted Information Method of Yanhe River Basin

作　　者：郑苗苗[1,2] 牛树轩 郑泓[1] 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]陕西省地质环境监测总站,陕西西安710054 [3]中交路桥技术有限公司,北京100011

出　　处：《灾害学》2016年第1期87-91,共5页Journal of Catastrophology

基　　金：国家重点基础研究发展计划"九七三"项目(2014CB744700);黄土重大灾害及灾害链的发生;演化机制与防控理论(2014CB744701);国家自然科学基金项目(41372329;40772181)

摘　　要：以延河流域为例,依据区县地质灾害详细调查资料,建立GIS地质灾害数据库,包含地理数据、基础地质数据、地质灾害点数据和栅格数据,选取坡度、坡型、植被、河谷地貌、地层、降雨量、道路距离、居民点8因素,采用加权信息量法进行地质灾害易发性分区研究。结果表明,延河流域高易发面积为1 664.96 km^2,占流域总面积的19.2%,灾害点有486处,灾害点密度为0.29处/km^2;中易发面积为3 102.02 km^2、占流域总面积的35.8%,灾害点有300处,密度为0.10处/km^2;低易发面积为3 888.99 km^2,占流域总面积的44.9%,灾害点有171处,密度为0.04处/km^2。Focused on Yanhe River Basin,and on the basis of detailed geological disaster investigation,we create a GIS geological hazards database,including geographic data,basic geological data,geological disaster point data and raster data. By selecting slope ratio,slope type,vegetation,river valley landforms,stratigraphy,rainfall,residential position,road distance,we make geology division according to disaster liability. Results show that the acreage of high-prone area is 1 664. 96 km^2,according for 19. 2% of the study area,486 disaster points,the density of disaster points is 0. 29 point / km^2. The middle prone area is 3 102. 02 km^2,according for 35. 8%,300 disaster points,0. 10 point / / km^2. And the low-prone area is 3 888. 99km^2,according for 44. 9,171 disaster points,0. 04 point / / km^2.

关 键 词：延河流域 地质灾害 加权信息量法 易发性 分区研究 

分 类 号：X43[环境科学与工程—灾害防治] P642[天文地球—工程地质学]