江淮分水岭地区旱灾风险评估

发布时间：2018-06-27 00:14

本文选题：旱灾 + 风险评估　；参考：《水土保持研究》2017年01期

【摘要】：利用江淮分水岭地区气象、遥感和社会经济统计数据,从旱灾致灾因子、承灾体、孕灾环境和防灾减灾措施4个方面选取了8个指标构建旱灾风险评估体系,通过主成分分析和分层构权主成分分析对该区2000—2010年旱灾风险等级分布进行了评价。研究表明:由于分层构权主成分分析法进行了更为客观的赋权,因而使研究区旱灾风险等级的区分度更加明显;时间上,2000—2010年江淮分水岭旱灾风险等级有降低的趋势,较低以上的干旱风险等级地区面积增加了约19.8%;空间上,高风险等级主要集中在中部地区,南部地区(来安、滁州、全椒、合肥、肥西、金安、裕安等)风险等级整体上低于北部地区(凤阳、定远、淮南、寿县等)。
[Abstract]:Based on the meteorological, remote sensing and socio-economic statistical data of Jianghuai watershed area, a drought risk assessment system was constructed from four aspects: drought disaster factors, disaster bearing bodies, disaster preparedness environment and disaster prevention and mitigation measures. The distribution of drought risk grade in this area from 2000 to 2010 was evaluated by principal component analysis (PCA) and hierarchical weight principal component analysis (PCA). The results show that the classification of drought risk grade in the study area is more obvious because of the more objective weight of the hierarchical construction weight principal component analysis, and the trend of decreasing drought risk grade in Jianghuai watershed from 2000 to 2010. The area of the area with the lower drought risk grade increased by about 19.8.The space, the high risk grade was mainly concentrated in the central region and the southern region (Lai'an, Chuzhou, Quanjiao, Hefei, Feixi, Jin'an, Yu an) risk rating overall lower than the northern region (Fengyang, Dingyuan, Huainan, Shouxian, etc.).
【作者单位】：滁州学院地理信息与旅游学院;滁州学院安徽地理信息集成应用协同创新中心;
【基金】：安徽高校人文社科重点研究基地项目(SK2015A176) 滁州学院科技创新团队支持计划项目(CXTD201105) 安徽省高校省级质量工程项目(2014jyxm371)
【分类号】：S423

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