滨海新区海绵城市建设的研究与探索

Research and Exploration of Sponge City Construction in Binhai New Area

针对城市内涝问题,以天津市滨海新区为例,介绍了SWMM模型中的低影响开发模块(LID模块),并运用SWMM模型系统,建立了滨海新区的雨洪模型,利用生物滞留区、渗渠、透水铺装3种常见的低影响开发措施,通过对滞留、蒸发、下渗等水文过程和不同重现期雨洪过程的模拟,评估不同重现期下LID措施的雨洪控制效果。结果表明,在2年一遇、5年一遇、10年一遇的降水时,LID措施对地表径流量的削减作用都有显著效果,可大大提高滨海新区的雨水排除能力,能有效缓解城市内涝。

Aiming at the problem of urban internal waterlogging,the Tianjin Binhai New Area is taken as an example to introduce the low-impact development model(LID model)in the SWMM model.Using the SWMM model system,a rain-flood model in the Binhai New Area is established.Three common low-impact development measures,such as biological retention areas,seepage channels and per-meable paving,are used to evaluate LIDs’effect of rain flood control at different return periods by simulating hydrological processes such as retention,evaporation,and infiltration.The results show that LID measures have a significant effect on the reduction of surface runoff in the 2-year,5-year,and 10-year precipitation cases,greatly improving the capacity of rainwater exclusion in the Binhai New Area,and effectively relieving urban waterlogging.