安徽省淮河流域水灾脆弱性特征及影响因素

利用历史灾情数据表征区域承灾体的脆弱性,分析了安徽省淮河流域水灾脆弱性特征。借助灰色关联度分析方法对水灾脆弱性指标进行反演,研究了影响水灾脆弱性的主要因素。结果表明:(1)安徽省淮河流域水灾脆弱性由淮河干流向两侧递变,由淮河以南向淮河以北逐渐降低;(2)人均GDP、年降水量、人口密度和水灾脆弱性有较强的相关关系;(3)除涝面积、防洪面积等和水灾脆弱性相关关系很弱。该研究可为区域减灾政策的制订与调整提供科学依据。

Vulnerability Characteristics of Flood Disasters and Their Impact Factors in the Huaihe River Basin of Anhui Province

Vulnerability characteristics of the Huaihe River floods are analyzed based on the historical disaster data to represent the vulnerability of hazard bearing body.The impact factors for the flood vulnerability are investigated by means of the gray relational analysis method for the inversion of food vulnerability indices. Results show that(1)the vulnerability of flood disasters in the Huaihe River basin decreases from the stem river to both sides. There is also a south to north decreasing trend in the whole basin. (2)The GDP per capi-ta, annual precipitation and the density of population in the basin have a significant correlation with the vul-nerability of flood disasters. (3)Waterlogging control area and flood control area are weakly correlated with the flood vulnerability.The study may provide a scientific basis of policy making and adjustment for regional disaster mitigation.