Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for st...Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for stormwater management in cities. There has been a shift from gray water management to green stormwater management thinking. The green stormwater infrastructure （GSI） is regarded as an effective and cost-efficient stormwater management eco-landscape approach. China＇s GSI practice and the development of its theoretical framework are still in the initial stage. This paper presents an innovative framework for stormwater management, integrating green stormwater infrastructure and landscape security patterns on a regional scale based on an urban master plan. The core concept of green stormwater infrastructure eco-planning is to form an interconnected GSI network （i.e., stormwater management landscape security pattern） which consists of the location, portion, size, layout, and structure of GSI so as to efficiently safeguard natural hydrological processes. Shanghai Lin- gang New City, a satellite new town of Shanghai, China was selected as a case study for GSI studies. Simulation analyses of hydrological processes were carried out to identify the critical significant landscape nodes in the high- priority watersheds for stormwater management. GSI should be planned and implemented in these identified landscape nodes. The comprehensive stormwater manage- ment landscape security pattern of Shanghai Lingang New City is designed with consideration of flood control, stormwater control, runoff reduction, water quality protec- tion, and rainwater utilization objectives which couldprovide guidelines for smart growth and sustainable development of this city.展开更多
受全球气候变暖的影响,我国西北干旱半干旱地区夏季暴雨发生的频率和强度逐年提高。选取该地区排水系统完善但具有洪涝风险的坡地校园,应用暴雨洪水管理模型(Storm Water Management Model,SWMM)分析暴雨情景下校园淹没情况,并据此制定...受全球气候变暖的影响,我国西北干旱半干旱地区夏季暴雨发生的频率和强度逐年提高。选取该地区排水系统完善但具有洪涝风险的坡地校园,应用暴雨洪水管理模型(Storm Water Management Model,SWMM)分析暴雨情景下校园淹没情况,并据此制定海绵化改造方案。研究发现,暴雨情景下学校地表径流主要分布在3条南北干道上。根据模型分析结果可知,设计长历时降雨情景下,超载管段数量为52个;设计短历时降雨情景下,超载管段数量最多为194个,潜在洪涝风险很大。秉持“源头控制、客水引流、中途滞蓄、末端排放”的基本思路制定海绵化改造方案,包括设计屋顶花园21处、雨水花园19处、植草沟14处、透水铺装34处和下沉式绿地38处。海绵化改造方案在长历时降雨情景下能够达到83.02%的年径流总量控制率,预期降低洪涝危害显著。研究结果可为西北坡地校园海绵化改造实践与雨水生态景观构建提供参考。展开更多
文摘Urban underlying surface has been greatly changed with rapid urbanization, considered to be one of the major causes for the destruction of urban natural hydrological processes. This has imposed a huge challenge for stormwater management in cities. There has been a shift from gray water management to green stormwater management thinking. The green stormwater infrastructure （GSI） is regarded as an effective and cost-efficient stormwater management eco-landscape approach. China＇s GSI practice and the development of its theoretical framework are still in the initial stage. This paper presents an innovative framework for stormwater management, integrating green stormwater infrastructure and landscape security patterns on a regional scale based on an urban master plan. The core concept of green stormwater infrastructure eco-planning is to form an interconnected GSI network （i.e., stormwater management landscape security pattern） which consists of the location, portion, size, layout, and structure of GSI so as to efficiently safeguard natural hydrological processes. Shanghai Lin- gang New City, a satellite new town of Shanghai, China was selected as a case study for GSI studies. Simulation analyses of hydrological processes were carried out to identify the critical significant landscape nodes in the high- priority watersheds for stormwater management. GSI should be planned and implemented in these identified landscape nodes. The comprehensive stormwater manage- ment landscape security pattern of Shanghai Lingang New City is designed with consideration of flood control, stormwater control, runoff reduction, water quality protec- tion, and rainwater utilization objectives which couldprovide guidelines for smart growth and sustainable development of this city.
文摘受全球气候变暖的影响,我国西北干旱半干旱地区夏季暴雨发生的频率和强度逐年提高。选取该地区排水系统完善但具有洪涝风险的坡地校园,应用暴雨洪水管理模型(Storm Water Management Model,SWMM)分析暴雨情景下校园淹没情况,并据此制定海绵化改造方案。研究发现,暴雨情景下学校地表径流主要分布在3条南北干道上。根据模型分析结果可知,设计长历时降雨情景下,超载管段数量为52个;设计短历时降雨情景下,超载管段数量最多为194个,潜在洪涝风险很大。秉持“源头控制、客水引流、中途滞蓄、末端排放”的基本思路制定海绵化改造方案,包括设计屋顶花园21处、雨水花园19处、植草沟14处、透水铺装34处和下沉式绿地38处。海绵化改造方案在长历时降雨情景下能够达到83.02%的年径流总量控制率,预期降低洪涝危害显著。研究结果可为西北坡地校园海绵化改造实践与雨水生态景观构建提供参考。
