City-scale strategies for urban drainage to regulate quantity and quality of flow

城市排水系统从未承受过如此大的压力，强降雨事件，城市化和人口都在增加。对地表径流的影响和联合下水道系统的超载导致全国范围内主要城市环境的水质差和洪水问题。城市需要新的城市排水战略，这些战略应纳入关于暴雨径流和污染途径的最佳可用数据和信息，理解并考虑到当前的城市形态、规划和法规，并在管理和法规范围内与所有相关利益攸关方共同制定。虽然传统的（灰色）基础设施在城市排水和污染管理方面仍然发挥着重要作用，但蓝绿基础设施（BGI）可以提供灵活和更实惠的手段，减少进入排水系统的水，减缓水流反应，并在污染源进入水道之前对其进行衰减和处理。需要证据来了解BGI如何，在何处以及何时与现有基础设施相结合，在时间和空间上帮助减轻洪水风险和污染。该WIRe CDT博士将制定城市排水战略框架，并提高对BGI绩效的理解;评估BGI的长期绩效和成本，包括管理和维护;并帮助设计未来的BGI战略，以减轻城市地区气候引发的洪水风险。

Urban drainage systems have never been under so much pressure, with intense rainfall events, urbanisation and populations all increasing. The impacts on surface runoff and overloading of combined sewer systems are resulting in nationwide issues of poor water quality and flooding in key urban environments. Cities require new urban drainage strategies that: incorporate the best available data and information about storm runoff and pollution pathways, understands and takes into consideration current urban form, planning and regulations, and are developed with all relevant stakeholders within boundaries of management and regulation. While conventional (grey) infrastructure still has a significant role to play in urban drainage and pollution management, Blue-Green Infrastructure (BGI) can provide flexible and more affordable means of reducing water entering drainage systems and slowing flow responses, and providing attenuation and treatment of pollution sources before they enter watercourses. Evidence is needed to understand how, where and when BGI aids flood risk and pollution mitigation over time and space in combination with existing infrastructure. This WIRe CDT PhD will develop a strategy framework for urban drainage and also improved understanding of BGI performance; assess long-term performance and costs of BGI, including management and maintenance; and aid design of future BGI strategies to mitigate climate-induced flood risk in urban areas.