Lu Lingwen, Johnson Matthew, Zhu Fangfang, Xu Yaoyang, Ruan Tian, Chan Faith Ka Shun
School of Geographical Sciences, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China.
Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences (CAS), Xiamen, 361021, China.
Sci Rep. 2024 May 28;14(1):12207. doi: 10.1038/s41598-024-61878-7.
Nature-based solutions (NbS), including China's Sponge City Program (SCP), can address the challenges urban communities face due to surface runoff and flooding. The current capacity of SCP facilities in urban environments falls short of meeting the demands placed on communities by climate change. Bioswales are a form of SCP facility that plays an important role in reducing surface runoff by promoting infiltration. This study assesses the potential of SCP facilities to reduce runoff in urban communities under climate change using the storm water management model. The study site in Ningbo, China, was used to evaluate the potential role of bioswales in reducing runoff risks from climate change. We found that bioswales were most effective in scenarios when rainfall peaks occurred early and were less effective in right-skewed rainfall events. The overall performance of SCP facilities was similar across all climate scenarios. To maintain the current protection level of SCP facilities, bioswales would need to cover at least 4% of the catchment area. These findings from Ningbo provide a useful method for assessing NbS in other regions and indicative values for the increase in the bioswale coverage needed to adapt to climate change.
包括中国海绵城市计划（SCP）在内的基于自然的解决方案（NbS），可以应对城市社区因地表径流和洪水而面临的挑战。目前城市环境中SCP设施的能力不足以满足气候变化给社区带来的需求。生物滞留池是SCP设施的一种形式，通过促进入渗在减少地表径流方面发挥着重要作用。本研究使用雨水管理模型评估了SCP设施在气候变化下减少城市社区径流的潜力。中国宁波的研究地点被用于评估生物滞留池在降低气候变化径流风险方面的潜在作用。我们发现，当降雨峰值出现较早时，生物滞留池在这些情景中最为有效，而在右偏降雨事件中效果较差。在所有气候情景下，SCP设施的整体性能相似。为维持SCP设施当前的保护水平，生物滞留池需要至少覆盖集水区面积的4%。来自宁波的这些发现为评估其他地区的NbS提供了一种有用的方法，以及为适应气候变化所需增加的生物滞留池覆盖面积提供了指示性数值。
