Simulated storm events were applied to four large bioretention columns to approximate 1.6 years of equivalent volume in Edmonton, Alberta’s typical climate. Summer, winter, and spring runoff were simulated in temperature-controlled laboratories with a range of −20℃ to +20℃. During summer less porous bioretention media (i.e. loam soil) effectively weakened peak flows by > 83% for 1:2 year events while more porous bioretention media (i.e. sandy loam soil) maintained hydraulic conductivities > 9.1 cm/hr. Winter operation consisted of all columns being subjected to −20°C and then 1°C repeatedly. Events were applied at an air temperature of 1°C and, although frozen initially, more porous media experienced faster water breakthrough and ponding disappearance in winter indicating that hydraulic performance during intermittent warming periods in winter may be achievable. All columns’ hydraulic performance rebounded quickly in the subsequent summer. All columns successfully managed 1:2 year events in terms of infiltration rate, ponding depth and duration. Preliminary results also showed that both media have the potential to manage less frequent (1:5 and 1:10 year) events.

在艾伯塔省的典型气候埃德蒙顿，模拟的风暴事件被应用到四个大型生物滞留柱上，相当于当量的1.6年。在温度控制范围为-20℃至+ 20℃的实验室中模拟了夏季，冬季和春季径流。在夏季，较少的多孔生物保留介质（即壤土）有效降低了1：2年事件的峰值流量> 83％，而更多的多孔生物保留介质（即沙壤土）将水力传导率保持在9.1 cm / hr以上。冬季作业由所有柱子承受-20°C，然后反复1°C组成。事件是在1°C的气温下进行的，尽管最初是冻结的，冬季，更多的多孔介质经历了更快的水渗透和积水消失现象，这表明冬季间歇性变暖期的水力性能是可以实现的。在随后的夏天，所有立柱的液压性能迅速反弹。在渗透率，深水深度和持续时间方面，所有色谱柱均成功管理了1：2年的事件。初步结果还表明，两种媒体都有可能处理频率较低的事件（1：5和1:10年）。