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

摘要: 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。

Abstract: 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.