基于GIS技术的会东县暴雨洪涝灾害风险区划  

Risk Zoning of Rainstorm and Flood Disaster Based on GIS in Huidong County

作　　者：李平兰 杨雯[2] 蔡自勇 

机构地区：[1]四川省会东县气象局,四川会东615200 [2]资阳市气象局

出　　处：《现代农业科技》2018年第2期231-233,236,共4页Modern Agricultural Science and Technology

摘　　要：利用会东县及周边县的历史气象资料,综合会东县自然、社会、经济与防灾减灾具体情况,对会东县的暴雨洪涝灾害致灾因子危险性、孕灾环境敏感性、承载体易损性和防灾减灾能力等因子建立相关指标,利用加权综合评价与GIS自然断点法,得到会东县暴雨洪涝灾害风险区划图。结果表明,暴雨洪涝灾害风险等级呈东—西向分布,最高和次高风险区基本集中在会东县的西部乡镇;此外,堵格镇、铁柳镇、大崇镇和铅锌镇的西部地区灾害风险等级也较高;中部、东南部地势较高的乡镇和东部地区灾害风险等级均较低;其余乡镇的暴雨洪涝灾害风险等级介于高、低值之间。Based on the historical meteorological data in Huidong County and surrounding counties,combined with the natural,social,economic,disaster prevention and mitigation conditions,the relative index had been established for the risk of disasters-causing factors,the sensitivity of disasterpregnant enviroment,the vulnerability of disaster body and the ability of disaster prevention and reduction.Then the risk zoning map of rainstorm and flood disaster had been got by using weighting comprehensive evaluation and GIS Natural Breaks. The results showed that the level of rainstorm and flood disaster risk was east-west distribution.The highest and second highest risk areas were mostly concentrated in the western townships of Huidong County. Moreover,there was a higher disaster risk level in the west of Duge Town,Tieliu Town,Dachong Town and Qianxin Town;there was a lower disaster risk level in the east and the townships with higher elevations in the central and south-east.The rainstorm and flood disaster risk level of other townships was between high and low values.

关 键 词：暴雨洪涝 风险区划 GIS 四川会东 

分 类 号：P426.616[天文地球—大气科学及气象学]