Abstract Wiltse B, Yerger EC, Laxson CL. 2019. A reduction in spring mixing due to road salt runoff entering Mirror Lake (Lake Placid, NY). Lake Reserv Manage. 36:109–121. Road salt has resulted in the salinization of surface waters across temperate North America. Increasingly, road salt is recognized as a significant regional pollutant in the Adirondack Park. Here we analyze biweekly limnological data from Mirror Lake (Lake Placid, NY) to understand the role of road salt runoff in an apparent lack of spring mixing in 2017. Water column profile data show notable spatial and temporal variability in chloride concentrations within the lake. Concentrations are highest at the lake bottom during the winter, with increases associated with the onset of road salt application to the watershed. High chloride concentrations in the hypolimnion persisted through the summer of 2017 due to a lack of complete spring mixing as the result of road salt induced density differences within the water column. Water density calculations and Schmidt stability point to an increase in water column stability due to the accumulation of salt at the lake bottom. The incomplete spring mixing resulted in greater spatial and temporal extent of anoxic conditions in the hypolimnion, reducing habitat availability for lake trout. Restoration of lake mixing would occur rapidly upon significant reduction of road salt application to the watershed and improvements in stormwater management.

中文翻译：

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由于道路盐分径流进入镜湖（纽约普莱西德湖），春季混合减少

摘要 Wiltse B、Yerger EC、Laxson CL。2019. 由于道路盐分径流进入镜湖（纽约普莱西德湖），春季混合减少。湖泊保护区管理。36:109-121。路盐导致北美温带地表水盐碱化。在阿迪朗达克公园，道路盐分越来越多地被认为是一种重要的区域污染物。在这里，我们分析了 Mirror Lake（纽约普莱西德湖）每两周一次的湖沼学数据，以了解 2017 年道路盐分径流在明显缺乏春季混合中的作用。水柱剖面数据显示湖内氯化物浓度的显着时空变异性。冬季，湖底的浓度最高，随着向流域施用道路盐分的开始而增加。由于道路盐分导致水柱内的密度差异，春季缺乏完全混合，因此下层水层中的高氯化物浓度持续到 2017 年夏季。水密度计算和施密特稳定性表明，由于湖底盐分的积累，水柱稳定性增加。不完整的春季混合导致水下层中缺氧条件的空间和时间范围更大，从而减少了湖鳟鱼的栖息地可用性。随着流域道路用盐用量的显着减少和雨水管理的改善，湖泊混合将迅速恢复。水密度计算和施密特稳定性表明，由于湖底盐分的积累，水柱稳定性增加。不完整的春季混合导致水下层中缺氧条件的空间和时间范围更大，从而减少了湖鳟鱼的栖息地可用性。随着流域道路用盐用量的显着减少和雨水管理的改善，湖泊混合将迅速恢复。水密度计算和施密特稳定性表明，由于湖底盐分的积累，水柱稳定性增加。不完整的春季混合导致水下层中缺氧条件的空间和时间范围更大，从而减少了湖鳟鱼的栖息地可用性。随着流域道路用盐用量的显着减少和雨水管理的改善，湖泊混合将迅速恢复。