摘要
利用重庆市各区县自然灾害资料,采用Arc GIS空间分析方法得到单灾种自然灾害分布图,进行图层叠加,采用"自下而上"的方法进行图斑合并,并结合重庆市地貌格局对自然灾害区域界线进行调整得到重庆市自然灾害综合区划图,将重庆市划分为渝东北部和渝东南部中山低山自然灾害区、渝中部和西部丘陵低山自然灾害区等两个一级区,进而按照自然灾害区域分异与组合,划分6个二级自然灾害区。重庆市自然灾害综合区划研究可为重庆市的区域防灾减灾提供科学依据。
Using Chongqing＇ s districts and counties natural disaster data and adopting ArcGIS spatial analysis methods obtain each single natural disaster hazard maps and conducted Overlay by Bottom-up Approach to merge polygons, The regional boundaries of the natural disasters in Chongqing were adjusted according to the macro land- form patterns in Chongqing to obtain Natural disaster comprehensive zoning map, the results show that the natural disasters regions can be divided into the natural disaster region in middle mountains and low mountains in the north- east and southeast Chongqing and the natural disaster region in hills and low mountains in the mid and west Chongqing. The two regions were divided into 6 sub-regions in according to the regional differentiation of the natu- ral disasters. The study can provide the scientific basis for the disaster prevention and mitigation in Chongqing.
出处
《灾害学》
CSCD
2017年第1期194-198,共5页
Journal of Catastrophology
基金
国家自然科学基金(41372177)
关键词
自然灾害
区域分异
综合区划
重庆市
natural disasters
regional differentiation
comprehensive zoning
Chongqing City
