摘要
本文以黑龙江省勃利县为例,采用地质灾害综合危险性指数法对地质灾害进行易发定量评价。首先将勃利县行政区划图进行网格剖分,运用栅格数据处理方法进行剖分,然后根据各单元的地质、地形地貌(坡度)、气候(植被覆盖)以及人类工程活动等条件(上述判别方法),利用MAPGIS空间分析功能,求取评价单元的潜在地质灾害强度指数与现状地质灾害强度指数,分级赋值进行换算叠加,获得评价单元的地质灾害综合危险性指数,再依据地质灾害综合危险性指数,合并相同单元格,划定地质灾害易发区。
This paper will take Heilongjiang province as an example,give cross-bred quantitative evaluation for the county by comprehensive risk index method of geological disasters.First do mesh dissection on the county administrative zoning map,using grid data processing method,then according to the geology,topography（slope）,climate（vegetation coverage） and human engineering activities conditions of each unit,using the space analysis function of MAPGIS,to get its potential geological disasters intensity index and current geological disasters intensity index.By assigning numbers to each and add up them,we could obtain the comprehensive geological hazards risk index of the units,then according to the comprehensivegeological hazards risk index,merge the same cell and mark out the often occurring areas.
出处
《中国地质灾害与防治学报》
CSCD
2011年第4期81-84,共4页
The Chinese Journal of Geological Hazard and Control
关键词
地质灾害
易发区
定量划分
geological disasters
cross-bred areas
quantitative zonation
