在气候条件下的绿色基础设施的成本效益评估

Urban hydrological changes caused by uncertain climate affect the implementation of water management strategies. Recently, more attention has been paid to the hydrological performance of green infrastructure (GI) in future climate scenarios. In this study, the Storm Water Management Model (SWMM) was applied to undertake integrated assessments of the runoff and water quality control effect of GI. Eight GI scenarios were proposed in Guangzhou’s Tianhe Smart City, and simulated rainfall events under different climate scenarios were assessed. Considering the factors of runoff volume control, peak flow reduction, pollutant removal, and life cycle cost, the advantages of different GI combinations were compared using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). The results confirmed that GI affect runoff control under changing climatic conditions, but its application to future large rainfall events is limited. According to the results of the TOPSIS assessment, decision-makers can consider different cost weights to determine the optimal scenario of GI implementation. The conclusions can be applied to GI construction planning projects to enhance the adaptability of urban water resource management systems.

不确定气候引起的城市水文变化影响实施水管理战略。最近，更多的关注已经支付了绿色基础设施的水文性能（GI）在未来的气候情景中。在这项研究中，雨水采用管理模式（SWMM）进行综合评估并对GI的径流和水质控制效果进行了分析。八个GI场景是在广州的天河智能城提出的，并模拟降雨吗对不同气候情景下的事件进行了评估。考虑到径流量控制因素、峰值流量减少因素、污染物因素去除，和生命周期成本，不同GI的优点采用顺序偏好技术进行比较与理想解的相似性（TOPSIS）。结果证实了GI影响在不断变化的气候条件下的径流控制，但它对未来大规模降雨事件的应用是有限的。根据TOPSIS评估的结果，决策者可以考虑不同通过成本权重来确定GI实现的最优场景。这个结论可应用于GI建设规划项目增强城市水资源管理系统的适应性。