海绵城市理念下的雨水系统改造策略研究

Research on Rainwater System Reconstruction Strategies under the Sponge City Concept

为验证海绵城市设施建设对提高现状雨水系统应对不同重现期降雨能力的作用,在不提高现状雨水系统设计规模的前提下,引入海绵城市设施,利用SWMM模型模拟已建成的设计重现期1 a的现状雨水系统增加海绵城市设施前后1、3、5 a设计重现期条件下雨水系统径流。结果表明,增加海绵设施后,系统满足3a设计重现期条件下雨水排放的要求,对设计重现期为5 a的降雨也有较好地排放能力。

In order to verify the ability of sponge city facilities to improve the ability of the current rainwater system to cope with rainfall in different return periods,introducting of sponge city facilities without increasing the de⁃sign scale of the current rainwater systerm,this paper uses the SWMM model to simulate the runoff of the rain⁃water system under the conditions of 1 year,3 year and 5 year design return periods after the completion of the current rainwater system with a design return period of 1 year and the addition of sponge city facilities.The results show that after adding sponge facilities,the system meets the needs of rainwater discharge under the condition of 3 year design return period,and has better discharge capacity for rainfall with a design return pe⁃riod of 5 years.