Wu Xuan, Moustakas Sotirios, Bezak Nejc, Radinja Matej, Alivio Mark Bryan, Mikoš Matjaž, Dohnal Michal, Bares Vojtech, Willems Patrick
Department of Civil Engineering, KU Leuven, Kasteelpark Arenberg 40, 3001 Leuven, Belgium.
Department of Civil Engineering, KU Leuven, Kasteelpark Arenberg 40, 3001 Leuven, Belgium.
Sci Total Environ. 2024 Oct 20;948:174750. doi: 10.1016/j.scitotenv.2024.174750. Epub 2024 Jul 14.
Blue and Green Infrastructures (BGIs) are natural or semi-natural systems that are considered an efficient solution to enhance stormwater management. To assess the performance of BGIs in mitigating floods and droughts in an urban area, a water balance model was developed in this study to simulate runoff formation and propagation. The developed model features fine spatial and temporal resolutions and flexibly integrates BGIs. Combining the conceptual single reservoir approach and the empirical continuous Soil Conservation Service Curve Number (SCS-CN) method, the model achieves computational efficiency, enabling long-term simulations that capture both short-term extreme events and long-term water balance. Its high transferability allows for easy incorporation of local datasets, making it adaptable to various urban contexts. Applied on a university campus located in Belgium, the model was used to simulate the water balance components of feasible BGIs for the study area, which were green roofs, permeable surfaces and rainwater tanks. Scenario analysis of both single BGI and combined BGI implementations was conducted, and all BGI scenarios were evaluated based on peak flow and runoff volume reduction and water balance analysis. Results demonstrate that the implementation of a combination of several BGIs with different functions is an effective solution for both flood control and drought mitigation, as these solutions can significantly reduce runoff flows, increase infiltration and provide considerable rainwater reuse.
蓝色和绿色基础设施（BGIs）是自然或半自然系统，被认为是增强雨水管理的有效解决方案。为了评估BGIs在减轻城市地区洪水和干旱方面的性能，本研究开发了一个水平衡模型来模拟径流的形成和传播。所开发的模型具有精细的空间和时间分辨率，并能灵活整合BGIs。该模型结合了概念性单水库方法和经验性连续土壤保持服务曲线数（SCS-CN）方法，实现了计算效率，能够进行长期模拟，捕捉短期极端事件和长期水平衡。其高可转移性允许轻松纳入本地数据集，使其适用于各种城市环境。该模型应用于比利时的一个大学校园，用于模拟研究区域可行的BGIs的水平衡组成部分，这些组成部分包括绿色屋顶、透水地面和雨水罐。对单个BGI和组合BGI实施情况进行了情景分析，并基于峰值流量、径流体积减少和水平衡分析对所有BGI情景进行了评估。结果表明，实施几种具有不同功能的BGIs组合是防洪和抗旱的有效解决方案，因为这些解决方案可以显著减少径流流量、增加入渗并提供可观的雨水再利用。
