ABSTRACT

Urban stormwater systems consist of structural characteristics including topological structure, pipe capacity, low impact developments and storage tanks, and these characteristics are important in the planning and the retrofitting stage. Therefore, this study evaluates the cost-effectiveness of each structural characteristic for enhancing resilience, based on simulation of massive virtual stormwater systems. The results show that it is more cost-effective to enhance resilience by finding better topological structure. Enlarging pipe capacity is also a fairly good choice, since it is more effective than building storage tanks, and more economical than building low impact development. Further, we find that improving topological structure and enlarging pipe capacity have potential in bringing extra resilience in the retrofitting stage for building low impact development and storage tanks. Therefore, the planning stage of urban stormwater systems should be considered seriously. Furthermore, we should pay more attention to the topological structure of urban stormwater systems.

摘要

城市雨水系统由结构特征组成，包括拓扑结构、管道容量、低影响开发和储罐，这些特征在规划和改造阶段很重要。因此，本研究基于对大规模虚拟雨水系统的模拟，评估了每个结构特征的成本效益，以增强弹性。结果表明，通过寻找更好的拓扑结构来增强弹性更具成本效益。扩大管道容量也是一个相当不错的选择，因为它比建造储罐更有效，比建造低影响开发更经济。更远，我们发现，改善拓扑结构和扩大管道容量有可能在改造阶段为建设低影响开发和储罐带来额外的弹性。因此，应认真考虑城市雨水系统的规划阶段。此外，我们应该更加关注城市雨水系统的拓扑结构。