绿色屋顶在城市雨洪管理中的应用研究综述

Application Study on Green Roof in Urban Storm Water Management

由于快速的城市化、土地利用变化等将自然透水表面改变为坚硬、不透水的表面,改变了雨水径流量和径流速率,影响自然水文循环,导致中国许多城市一遇到暴雨天气就会出现比较严重的城市内涝问题。绿色屋顶作为城市绿色基础设施在城市雨洪管理中发挥重要作用,根据分析,在不同降雨事件中,绿色屋顶的径流截留率为50%~80%。广泛绿色空间的应用不仅有效缓解城市地区的内涝问题,也为在城市环境中生活和工作的人提供更美观的空间。当前,海绵城市建设也面临一系列挑战,例如,建设成本高昂、管理机构复杂等,因此,在海绵城市建设过程中,每个城市要按照自身能力分阶段分步骤地建设完成。

Due to rapid urbanization and land use change, the naturally permeable surface is changed into a hard and impervious surface, which changes the runoff and runoff rate of rainwater and affects the natural hydrological cycle. As a result, many cities in China will have serious urban waterlogging problems when encountering rainstorm weather. Green roofs, as urban green infrastructure, play an important role in urban flood management. According to the analysis, in different rainfall events, the runoff interception rate of green roofs is between 50% and 80%. The extensive application of green space not only effectively alleviates the problem of waterlogging in urban areas, but also provides a more beautiful space for people living and working in the urban environment. At present, the construction of sponge city is also facing a series of challenges, such as high construction cost, complex management organization, and inconsistent infrastructure design standards, etc. Therefore, in the process of sponge city construction, each city should complete the construction step by step according to its own ability.