摘要
以中小尺度区域——甘肃省舟曲县为研究对象,选取县内19个乡镇为评价单元,利用区域危险度及易损度作为基础评价指标,进行中小尺度区域风险评价。区域危险度采用信息量法,以栅格250 m×250 m为基础单元进行评价,获得舟曲县各乡镇危险度;区域易损度以生命和财产作为衡量标准,从人口易损性、经济与生态环境易损性进行分析,得到研究区各乡镇综合易损度。通过危险度与易损度耦合,建立了风险评价模型,结合GIS技术划分区域风险等级,绘制了舟曲县风险区划图,同时提出了中小区域防灾减灾建议。研究结果表明,舟曲县极高风险区主要分布于城关镇、东山乡及江盘乡、大川乡和果耶乡部分区域。
Based on the field survey, Zhouqu County, Gansu Province, China was selected as the medium and smallscale study area, 19 villages in the county were divided as the evaluation units. The article used hazards and vulnerability as a basis for evaluation of the area, which made the medium and small-scale regional risk assessment come true. Among them, the information method was adopted in regional hazards assessment,which based on the 250 m × 250 m gridunits to evaluate the hazardous value of each villages and towns of zhouqu county; Life and properties as a measure of regional vulnerability, the article took the population vulnerability （Vp）, economic and ecological environment vulnerability （Vm） into account to get the comprehensive vulnerability degree of each village in the study area. Hazards and vulnerability were coupled, then the risk assessment model was established, based on which the risk rank and the risk zoning map of Zhouqu county were obtained using GIS technology. Meanwhile, some recommendations about disaster prevention and mitigation in medium and small regional were proposed. The results showed that the extremely high-risk districts in Zhouqu County were mainly distributed in the Chengguan town, Dongshan village, Jiangpan village, Dachuan village and part area of Guoye village.
出处
《山地学报》
CSCD
北大核心
2014年第6期754-760,共7页
Mountain Research
基金
国家科技支撑计划项目(2011BAK12B05)资助~~
