基于SWMM的已建区海绵化改造设计研究--以南开大学老校区为例

Sponge Retrofit Design of Built-up Area Based on SWMM Model:a Case Study of Nankai University

以可实施性和现状问题为导向,在《海绵城市建设技术指南--低影响开发雨水系统构建(试行)》基础上提出适用于已建区的海绵化改造设计方法,包括目标设定、汇水分区划定、LID设施规模积计算、LID设施选择与布局及SWMM模拟校核优化。之后通过南开大学海绵化改造进行实践验证,结果表明,改造方案合理可行,年降雨和场次降雨事件模拟结果均能达到海绵城市建设目标,可以为相关改造类项目提供参考。

Based on“Sponge City Development Techni-cal Guide:Low impact Development”,by considering the accessibility and current problems,the paper provides a sponge city retrofit design method in urban built-up area.The retrofit design,in this paper,includes target setting,sub-catchment areas delimiting,LID facilities’size calcula-tion,LID facilities’selection and distribution,and SWMM model verification.Then picking the site of Nankai Univer-sity as a case study,the retrofit methods is applied.The re-sults shows that the project meets the goals of the Sponge City requirements both in yearly precipitation process and single rain process.