基于内涝灾害防控的厦门雨洪安全格局模拟与设计策略研究

SIMULATION AND DESIGN STRATEGY OF RAINSTORM SAFETY PATTERN IN XIAMEN BASED ON WATERLOGGING PREVENTION AND CONTROL

在快速城镇化的进程中,城市内涝问题日益突出,合理搭建区域雨洪生态安全格局是保障生活和居住安全的重要手段。本研究综合运用SCS-CN水文模型和GIS空间耦合方法,确定淹没区空间定位,划定保障城市安全的红线区域、预防缓解城市危险的缓冲区、城市弹性空间和生态涵养区。评价河流水域的安全空间,构建"点状水源+淹没斑块+河流廊道"的雨洪生态安全格局网络。选取厦门市为研究对象,提炼出雨洪安全格局数值模拟及评价指标,提出高、中、低层级雨洪安全格局的防控方案。同时,在城市规划层面,提出控制红线边界与保护利用、提升空间格局上的集约性规划布局、优化生态水生环境建设,以及加强雨洪管理等发展策略。

Because of the process of rapid urbanization in China,the urban water security problem is becoming more prominent.Reasonable construction of Rainstorm Ecological Security Pattern is an important means to guarantee the safety of life and residence.Under the usage of SCS-CN Hydrological Model and GIS space-coupling method,we successfully defined four zones after allocated the submerged areas,including the ecological red-line zones that keeps the city safe,the buffer zones that mitigates and prevents major urban risks,the resilience zones with high flexibility,and the ecological conservation zones.The study assesses the safety space of the river water,building an ecological security patterns of:point water,inundated patches,and river corridors.Selecting Xiamen city as the research object,the study extracts an evaluation index and the numerical stimulation of the Rainstorm Ecological Security Pattern,presenting a planning and control scheme with different levels(high,middle and low).In the specific field of city planning,this study also present,preservation of the ecological red-line areas,improvement of the intensive layout planning,construction of ecological aquatic environment,and enhancement of the rain and flood management.