北京市门头沟新城“23·7”特大暴雨洪水灾害成因分析及对策研究

Retrospective simulation and planning strategies study of “23·7” flood for New Downtown in Mentougou District of Beijing City

基于洪水调查及模型反演,使用地质灾害监测雨量站监测数据和2 m精度数字高程模型(DEM)数据,对北京市门头沟新城“23·7”特大暴雨洪水进行反演复盘,分析灾害产生的原因,暴露出门头沟新城现状防洪系统在山洪截流疏导、防洪河道治理、城市竖向建设和应急管理等方面存在的短板,提出了相关改进策略,并结合模型模拟结果评估了相关改进策略的效果,进一步展望了城市洪涝模型在城市防洪和韧性提升规划建设工作中的作用。

Based on the flood survey and model inversion,using the monitoring data of the geological disaster monitoring rainfall station and the 2 m precision digital elevation model(DEM) data,the "23·7" extremely heavy rainstorm in New Downtown in Mentougou District of Beijing City was retrieved for flood inversion.The causes of the disaster were analyzed,and the shortcomings of the current flood system in Mentougou New Town in terms of mountainous flooding closure and dredging,flood harnessment in river channels,urban vertical construction and emergency management were exposed.The relevant improvement strategies were proposed.The effects of the relevant improvement strategies were evaluated combined with the model simulation results,and the role of urban flood model in urban flood control and resilience improvement planning and construction was further prospected.