Climate change coupled with urbanization and its increasing impervious surfaces have caused major challenges for the water sector worldwide. In Norway, an ageing infrastructure with already insufficient drainage capacities results in large amounts of runoff during high-intensity rainfall events causing frequent floods in urban areas. Due to limited available space to handle the future projected increase in stormwater, there is a need to utilize already occupied space for stormwater management, such as roads and streets, during extreme events. Limited research has been done on the design and applicability of urban streets as temporarily flood ways diverting stormwater to the nearest recipient. This paper will study the benefits and limitations of adapting urban streets as safe flood ways to route stormwater by modelling an urban street as a floodway. Streets as floodways will require additional hydraulic performance criteria and safety criteria. Performance criteria are identified and evaluated, and a method is proposed for the evaluation of urban streets applicability as floodways. The method can be used to evaluate the applicability of multifunctional streets used as urban floodways and can be adapted by municipalities as a decision support tool for stormwater

中文翻译：

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城市街道作为临时开放泄洪道的适用性

气候变化加上城市化及其日益增加的不透水表面，给全世界的水行业带来了重大挑战。在挪威，排水能力已经不足的老化基础设施导致在高强度降雨事件期间产生大量径流，从而导致城市地区频繁发生洪水。由于用于处理未来预计增加的雨水的可用空间有限，在极端事件期间，需要利用已经占用的空间进行雨水管理，例如道路和街道。对城市街道的设计和适用性进行了有限的研究，作为将雨水转移到最近的接收者的临时洪水方式。本文将通过将城市街道建模为泄洪道，研究将城市街道作为安全的洪水方式来引导雨水的好处和局限性。作为泄洪道的街道将需要额外的水力性能标准和安全标准。确定和评估性能标准，并提出了一种评估城市街道作为泄洪道的适用性的方法。该方法可用于评估用作城市泄洪道的多功能街道的适用性，并可被市政当局用作雨水决策支持工具