Green Streets: Designing permeable pavement systems in the road right-of-way

城市化、基础设施老化和气候变化引发的洪水对加拿大人构成越来越大的威胁。城市径流通过加速侵蚀、降低水质和退化水生生态系统，对城市水资源产生负面影响。低影响开发(LID)技术，如渗透性路面，已被证明通过增加现场处理和雨水的渗透来减少城市径流。透水性路面已被广泛应用于停车场应用，但加拿大市政当局越来越有兴趣在道路通行权内铺设透水性路面。这种渗透性路面的新兴应用正在产生几种新的设计，以及施工和运营方面的挑战。附近建筑物的漏水增加了雨水流入渗透性人行道的流量，行人安全必须在整个冬季得到满足，人行道必须满足其他地下和地面设施和基础设施的需要。拟议研究计划的长期目标是开发和改进设计、施工和运营实践，以最大限度地提高透水性路面性能和道路通行权应用的寿命。短期目标将侧重于安大略省南部的应用，并将(1)制定渗水路面的最佳管理实践，以最大限度地提高行人和车辆的安全，同时将道路盐渍活动对环境的负面影响降至最低，以及(2)评估针对道路通行权应用的独特条件的非标准渗水路面设计。由于缺乏针对加拿大的设计指导以及标准化的施工和操作做法，目前正在阻碍采用LID技术，以减少城市化对我国水资源的影响。通过解决这些知识差距，这项研究将改善加拿大各地绿色街道倡议的绩效，并最终取得成功。这项工作旨在通过降低城市洪灾的发生率和严重程度，保护我们的水资源，并提高透水性路面建设的长期可持续性，使加拿大人受益。

Flooding caused by urbanization, aging infrastructure, and climate change is a growing threat to Canadians. Urban runoff negatively impacts urban water resources by accelerating erosion, reducing water quality and degrading aquatic ecosystems. Low Impact Development (LID) technologies such as permeable pavements have been shown to reduce urban runoff by increasing on-site treatment and infiltration of stormwater. Permeable pavements have been extensively applied to parking lot applications, but there is increasing interest from Canadian municipalities to implement permeable pavements within the road right-of-way. This emerging application for permeable pavements is generating several new designs, as well as construction and operation challenges. Run-on from nearby buildings increase stormwater flows to permeable pavements, pedestrian safety must be accommodated throughout winter seasons and pavements must accommodate other underground and surface utilities and infrastructure. The long-term objective of the proposed research program is to develop and improve the design, construction and operational practices to maximize permeable pavement performance and longevity of road right-of-way applications. The short-term objectives will focus on applications in Southern Ontario and will (1) develop best management practices for permeable pavement to maximize pedestrian and vehicular safety while minimizing negative environmental impacts from road salting activities and (2) evaluate non-standard permeable pavement designs  that address the unique conditions of road right-of-way applications. A lack of Canadian-specific design guidance and standardized construction and operational practices is currently inhibiting the adoption of LID technologies to reduce the impacts of urbanization on our water resources. By addressing these knowledge gaps, this research will improve the performance and ultimately, the success of green street initiatives across Canada. This work aims to benefit Canadians by reducing rates and severity of urban flooding, protecting our water resources and improving the longterm sustainability of permeable pavement construction.