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基于GIS的河北省滦县洪水灾害风险评价

DOI: 10.13577/j.jnd.2014.0312, PP. 93-100

Keywords: 洪水灾害,风险评价,危险性,易损性,滦县,GIS

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Abstract:

依据灾害学理论,基于GIS技术,通过综合分析致灾因子、孕灾环境的自然属性和承灾体的社会经济属性,从形成洪水灾害的自然环境危险性和社会经济易损性两方面出发,对河北省滦县的洪水灾害综合风险进行了评价。在洪灾危险性评价中,综合考虑降水量、降水变率、地形高程、坡度、水系分布等自然因素;在洪灾易损性评价中,综合考虑人口密度、单位面积年粮食产量和GDP密度等社会经济指标;在此基础上利用GIS方法对洪灾危险性评价和易损性评价进行叠加分析,得到滦县洪灾综合风险评价结果。结果表明:洪水灾害风险主要集中在滦县东南部平原区,且以河流干流为中心向两边递减,以东部的滦河、溯河中下游、西北部的管河上游风险最高。

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