施加福,王昊,周晋军,丁一,张树勋

• 1:北京工业大学城市建设学部

摘要(Abstract)：

【目的】城市化进程加快和气候变化导致内涝积水频发，造成道路封闭和交通堵塞，给城市应急救援响应的时效性带来严重影响。为了准确评估暴雨内涝下的城市应急救援响应能力，【方法】以荔湾区为例，通过构建内涝水动力模型，模拟不同设计降雨情景下的内涝积水，识别道路积水风险，明确阻断道路，并结合两步移动搜寻法(2SFCA)对不同脆弱性的兴趣点(POI)的应急救援服务可达性进行评估。【结果】结果显示：随着降雨重现期从1 a一遇增大到100 a一遇，内涝积水面积增大，平均积水深度从0.08 m增大到0.20 m。受积水影响道路数量持续增加，阻断道路长度从11 km上升至49 km,增长了超过300%。随着阻断道路的增多，应急救援可达的POI数量呈现下降趋势，并且在不同时间阈值内平均下降40%以上，可达性呈明显下降趋势。【结论】内涝模型耦合城市路网得到的道路积水可以揭示阻断道路的总体格局，可达性模型可以快速估算出应急救援的时效性。结果可为应急救援响应能力的评估提供参考。

关键词(KeyWords)： 暴雨内涝;水力耦合模型;两步移动搜寻法(2SFCA);应急救援;可达性;气候变化;降水;洪水

Abstract:

Keywords:

基金项目(Foundation): 北京市朝阳区科技计划项目(CYSF2237);; 国家自然科学基金重大项目课题(52192671)

作者(Author): 施加福,王昊,周晋军,丁一,张树勋

DOI: 10.13928/j.cnki.wrahe.2024.02.003

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