Integrated assessments of green infrastructure for flood mitigation to support robust decision-making for sponge city construction in an urbanized watershed
Integrated assessments of green infrastructure for flood mitigation to support robust decision-making for sponge city construction in an urbanized watershed
复制标题
防洪绿色基础设施综合评估，支持城市化流域海绵城市建设的稳健决策
DOI：
10.1016/j.scitotenv.2018.05.199
复制
发表时间：
2018
影响因子：
9.8
通讯作者：
Shao Weiwei
中科院分区：
文献类型：
--
作者：
Mei Chao;Liu Jiahong;Wang Hao;Yang Zhiyong;Ding Xiangyi;Shao Weiwei
由于气候变化和城市化的影响，绿色基础设施(GI)在城市雨水管理中变得越来越重要。为了缓解严重的城市水相关问题，中国正在其海绵城市计划(SCP)下，在全国范围内实施GI。战略规划目前处于试点阶段，然而，中国实施退伍军人政策的成本效益问题却鲜有人关注。在这项研究中，基于雨水管理模型(SWMM)和生命周期成本分析(LCCA)的评估框架被应用于对GI用于缓解洪水的发展进行综合评估，以支持城市化流域海绵城市建设的稳健决策。模拟和评估了6个重复间隔为2-100年 年的设计降雨事件下的一个基线情景和15个GI情景。模型模拟结果证实了GI在防洪减灾中的有效性。然而，即使在最有利的情况下，结果也表明，地理信息系统的水文性能不能消除洪水。分析表明，在所有降雨事件下，生物保育单元(BC)+植被沼泽(VS)方案是单位投资的最具成本效益的GI方案。然而，考虑到所有GI情景的实施区域的最大潜力，透水性路面+BC + VS策略被认为最适合于研究区域。虽然最优组合受到模型和地理信息系统参数不确定性的影响，但得出的主要趋势和关键见解并未受到影响；因此，结论对于研究区域内的海绵城市建设是相关的。
Green Infrastructure (GI) has become increasingly important in urban stormwater management because of the effects of climate change and urbanization. To mitigate severe urban water-related problems, China is implementing GI at the national scale under its Sponge City Program (SCP). The SCP is currently in a pilot period, however, little attention has been paid to the cost-effectiveness of GI implementation in China. In this study, an evaluation framework based on the Storm Water Management Model (SWMM) and life cycle cost analysis (LCCA) was applied to undertake integrated assessments of the development of GI for flood mitigation, to support robust decision making regarding sponge city construction in urbanized watersheds. A baseline scenario and 15 GI scenarios under six design rainfall events with recurrence intervals ranging from 2–100 years were simulated and assessed. Model simulation results confirmed the effectiveness of GI for flood mitigation. Nevertheless, even under the most beneficial scenario, the results showed the hydrological performance of GI was incapable of eliminating flooding. Analysis indicated the bioretention cell (BC) plus vegetated swale (VS) scenario was the most cost-effective GI option for unit investment under all rainfall events. However, regarding the maximum potential of the implementation areas of all GI scenarios, the porous pavement plus BC + VS strategy was considered most reasonable for the study area. Although the optimal combinations are influenced by uncertainties in both the model and the GI parameters, the main trends and key insights derived remain unaffected; therefore, the conclusions are relevant regarding sponge city construction within the study area.