基于GIS的青南高原自然灾害综合区划研究

Research on Comprehensive Regionalization of Natural Disasters in South Qinghai Plateau Based on GIS

本文根据青南高原地形、地貌、气候等自然地理要素及2002年人口、经济等社会人文要素和1949-2000年自然灾害统计数据与相关文献,运用ARCGIS 9.0及ARCVIEW 3.2软件建立青南高原自然灾害综合区划空间数据库及属性数据库并生成区划基本单元,运用自下而上区域合并的方法得到青南高原自然灾害区划小区,结合自上而下区域划分的方法将青南高原自然灾害划为4个一级灾害区10个二级灾害区,得到青南高原自然灾害综合区划方案。

Based on the analysis of the natural and human background, including topography, climate population, economics, and so on,. the distribution, characters, formation and development mechanism of geological disasters in South Qinghai Plateau were analyzed. By selecting the assessment indices of causing natural disasters factors and disaster bodies according to natural disasters systematic theory, the map of natural hazards and the vulnerability map of regional disaster bodies in the area were achieved by geographic information system analyzing. Overlaying and analyzing the map of natural environment sensitiveness to disasters, the map of natural hazards and the vulnerability map of disasters bodies by GIS, the basic units of natural disasters regionalization of South Qinghai Plateau was achieved. After dealing with the attribute database of the map of natural disasters regionalization basic units, in the light of given regionalization principles, and by combination with the dividing quantitative method of bottom - up and top - down, the comprehensive regionalization of natural disasters was made and four major disaster regions and 10 sub-regions were obtained. Furthermore, natural disasters, environment and social e- conomy of every region were elaborated in detail.