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【目的】系统地分析长江经济带各省洪涝灾害社会脆弱性及时空特征，对其防灾减灾提供决策依据。【方法】以长江经济带11个省作为研究对象，基于暴露度-敏感性-适应性(ESA)脆弱性评估框架构建社会脆弱性评估模型，并采用熵权法和多级模糊综合评价方法，对长江经济带洪涝的社会脆弱性和时空分布特征进行评估和分析。【结果】结果表明：(1)长江经济带洪涝社会脆弱性分布呈现出下游低，中游适中，上游高的特征。上游地区社会脆弱性指数平均值约为下游地区的4倍，中游地区的2倍。(2)2009—2019年长江经济带社会脆弱性的暴露度和适应性小幅上升、敏感性持续降低，整体上社会脆弱性表现为持续降低，经济带的灾害防御能力在逐年增强。(3)长江经济带洪涝社会脆弱性的影响因素表现出显著的空间异质性。高适应性和低敏感性是下游地区低社会脆弱性的原因；低适应性是中上游地区高脆弱度的主要原因；高暴露和高敏感性是湖南省的主要影响因素。【结论】就不同地区的致脆主导因素，提出针对性的防灾减灾措施。对于城市基础设施建设能力不足的地区，如江西省和四川省，其基础设施适应性指数对总适应性指数的贡献率分别为43%和47%,应当兴修其排水基础设施，加强防洪排涝设施的管护，增加绿化面积，建设海绵城市，提高城市韧性等。就水库数量不足导致其灾害抵御能力较弱的地区如贵州省，应当加快病险水利工程加固提标，开展小型水库系统治理评估等。
Abstract：[Objective]Systematically analyzing the vulnerability and spatiotemporal characteristics of flood disasters in various provinces of the Yangtze River Economic Belt, could provide decision-making basis for disaster prevention and reduction.[Methods]The vulnerability assessment model was constructed based on the Exposure-Sensitivity-Adaptive capacity(ESA) framework, adopting the entropy weight method and multi-level fuzzy comprehensive evaluation method to assess and analyze the social vulnerability and spatiotemporal distribution characteristics of floods in the Yangtze River Economic Belt.[Results]The result indicate that:(1) The distribution of flood vulnerability in the Yangtze River Economic Belt exhibits characteristics of low downstream, moderate midstream, and high upstream. The average vulnerability index of the upstream region is about 4 times that of the downstream region and 2 times that of the midstream region.(2) From the perspective of time distribution, the exposure and adaptability of the vulnerability of the Yangtze River Economic Belt increased slightly from 2009 to 2019, while the sensitivity continued to decrease. Overall, the vulnerability showed a continuous decrease, and the disaster prevention capacity of the Economic Belt was increasing year by year.(3) The influencing factors of flood vulnerability in the Yangtze River Economic Belt exhibit significant spatial heterogeneity, with high adaptability and low sensitivity being the reasons for low downstream vulnerability; Low adaptability is the main reason for high vulnerability areas in the middle and upper reaches; High exposure and high sensitivity are the main influencing factors in Hunan Province.[Conclusion]Targeted disaster prevention and mitigation measures should be proposed based on the dominant factors of vulnerability in different regions. For areas with inadequate urban infrastructure construction capabilities, such as Jiangxi and Sichuan provinces, their infrastructure adaptability index contributes 43% and 47%, respectively, to the total adaptability index. Therefore, efforts should be made to improve their drainage infrastructure, strengthen flood control and drainage facilities, increase green areas, build sponge cities, and enhance urban resilience. In areas where the number of reservoirs is insufficient, leading to weak disaster resistance capacity, such as Guizhou Province, efforts should be accelerated to reinforce and upgrade vulnerable water conservancy projects and conduct assessments of small-scale reservoir system governance.
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基本信息:
DOI：10.13928/j.cnki.wrahe.2024.03.003
中图分类号:TV87
引用信息:
[1]贺玲,陈佳川,程春歌,等.长江经济带洪涝灾害社会脆弱性评价及时空分析[J].水利水电技术(中英文),2024,55(03):24-39.DOI:10.13928/j.cnki.wrahe.2024.03.003.
基金信息:
国家自然科学基金项目(72348003);国家自然科学基金国际合作重点项目(72261147472); 北京物资学院校级青年基金(2023XJQN01)
2023-11-20
2023-11-20
2023-11-20