A study of mixing, water quality and ice cover formation in stormwater ponds

在城市地区，不透水表面的存在导致地表径流的体积和速度大大增加。雨水管理湖，或雨水池，主要用来控制多余的水，方法是暂时储存地表径流，然后以较低的速度释放。雨水池的设计不仅是为了减少洪水泛滥，也是为了通过清除污染物来改善水质。池塘通常位于城市分区，它们离民居很近，这造成了两个问题。首先，藻类大量繁殖和水生植物过度生长导致水质变差，导致附近居民经常投诉有异味和难看的池塘浮渣。其次，居民发现结冰的雨水池塘对冬季娱乐活动(如滑冰、曲棍球和扫帚)很有吸引力，但不可预测的冰盖行为使这些活动变得危险。对冰盖安全的担忧以及埃德蒙顿雨水池塘中滋扰藻类大量繁殖的持续问题是这项研究提案的动机。拟议研究的目标是：

In urban areas the presence of impervious surfaces results in greatly increased volumes and rates of surface runoff. Stormwater management lakes, or stormwater ponds, are used primarily to control the excess water by temporarily storing surface runoff and then releasing it at a decreased rate. Stormwater ponds are designed not only to reduce flooding but also to improve water quality by removing pollutants. Ponds are often located in urban subdivisions and their close proximity to residential dwellings creates two problems. First, poor water quality caused by algae blooms and excessive aquatic plant growth lead to frequent complaints from nearby residents about odours and the presence of unsightly pond scum. Second, residents find frozen stormwater ponds attractive for winter recreational activities such as skating, hockey and broomball but unpredictable ice cover behaviour makes these activities dangerous. Concerns about the safety of ice covers and the ongoing problems with nuisance algae blooms in Edmonton's stormwater ponds are the motivation for this research proposal. The objectives of the proposed research are to: