基于GIS的关中地区自然灾害脆弱性评价

Evaluation on Natural Disaster Vulnerability Based on GIS in Guanzhong Area

为政府部门开展城市防灾减灾工作及可持续发展提供参考,利用陕西省关中地区2015年自然灾害灾情数据,采用数理统计分析方法对该区域自然灾害特征进行分析,并对其灾害脆弱性进行评价。结果表明:研究区的受灾人口和农作物受灾面积是影响自然灾害脆弱性的直接因素,灾害造成的直接经济损失是影响自然灾害脆弱性的间接因素;关中地区自然灾害脆弱性具有明显的空间分布差异性,北部的渭南和咸阳是自然灾害脆弱性等级较高地区,南部的西安是自然灾害脆弱性较低地区。

The natural disaster characteristics in Guanzhong area were analyzed by the statistical analysis method based on the data of natural disaster situation in2015and the disaster vulnerability was evaluated to provide a reference for urban disaster prevention and mitigation,and sustainable development.Results:The disaster-affected population and disaster affected crops area are two direct factors influencing natural disaster vulnerability and the direct economic loss caused by disasters is an indirect factor influencing natural disaster vulnerability.There is an obvious difference in spatial distribution of natural disaster vulnerability in Guanzhong area.The natural disaster vulnerability of Weinan and Xianyang regions in northern Guanzhong is relatively high but the natural disaster vulnerability of Xi'an City in southern Guanzhong is relatively low.