基于GAST-SWMM模型的西安市中心城区内涝灾害模拟及风险评估  

Simulation and Risk Assessment of Waterlogging Disasters in the Main Urban Area of Xi'an Based on GAST-SWMM Model

作　　者：张文晴 侯精明 王汉岗 王晨 陆品品 徐辉 ZHANG Wenqing;HOU Jingming;WANG Hangang;WANG Chen;LU Pinpin;XU Hui(State Key Lab of Eco-Hydraulics in Northwest Arid Region of China,Xi'an University of Technology,Xi'an 710048,China;The Pearl River Hydraulic Research Institute,Guangzhou 510611,China;CAUPD Beijing Planning and Design Consultants Ltd.,Beijing 100044,China;Shaanxi Weihe Ecological Group Co.,Ltd.Xi'an 710068,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,陕西西安710048 [2]珠江水利委员会珠江水利科学研究院,广东广州510611 [3]中规院(北京)规划设计有限公司,北京100044 [4]陕西渭河生态集团有限公司,陕西西安710068

出　　处：《人民珠江》2023年第8期68-81,共14页Pearl River

基　　金：国家自然科学基金项目(52009104、52079106);中德合作交流项目(M-0427);陕西省科技创新团队(2020TD-023)。

摘　　要：为有效治理城市内涝灾害,基于数值模型的城市内涝过程模拟与基于多源融合信息的城市内涝风险评估已经逐渐成为了重要的非工程措施。以西安市中心城区为研究区域,基于GAST-SWMM模型,模拟了5、10、30、50、100 a降雨工况下的内涝过程;并结合模拟所得的相关水力要素,构建了以自然因子-社会因子为内涝风险评估框架的多指标评估体系。结果表明:研究区域的内涝高风险区域主要分布于城市中心道路上;各降雨工况下,多指标综合内涝风险评估与单一内涝积水深度指标的低风险区面积占比差值范围在-50%~-60%,中风险区面积占比差值范围在45%~60%,因此基于多源融合信息进行城市内涝灾害风险评估具有重要意义。In order to effectively control urban waterlogging disasters,urban waterlogging process simulation based on a numerical model and urban waterlogging risk assessment based on multi-source fusion information have gradually become important non-engineering measures.Taking the central urban area of Xi'an City as the study area,this paper simulated the waterlogging process under rainfall conditions of 5 a,10 a,30 a,50 a,and 100 a based on the GAST-SWMM model.Combined with the relevant hydraulic factors obtained from simulation,a multi-indicator assessment system was constructed by using natural factors and social factors as the framework for waterlogging risk assessment.The results indicate that the high-risk areas of waterlogging in the study area are mainly distributed on the urban central roads.Under various rainfall conditions,the difference in the proportion of low-risk areas between the multi-indicator comprehensive waterlogging risk assessment and a single waterlogging depth indicator ranges from-50%to-60%,while the difference in the proportion of medium-risk areas ranges from 45%to 60%.Therefore,it is of great significance to conduct urban waterlogging disaster risk assessment based on multi-source fusion information.

关 键 词：城市内涝灾害 GAST-SWMM模型 风险评估 西安市 

分 类 号：TU992[建筑科学—市政工程]