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Seasonally varying highway de-icing agent contamination in a groundwater plume from an infiltration basin

机译：渗透盆地地下水羽中季节性除冰剂的季节性变化

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This research documents the seasonal variation of de-icing agent contamination by measuring the specific conductivity of runoff and groundwater from an infiltration basin that serves a highway drainage system in southeast Massachusetts. The order of magnitude of the winter maxima of the runoff and groundwater specific conductivities over a 9 year period of record is 10 mS cm~(-1). The groundwater specific conductivity decreases by 1-2 orders of magnitude to its fall minimum, which is an order of magnitude higher than the fall minimum of the runoff. This warm weather source behaviour implies slow, seasonal dissolution of de-icing agent solids deposited in the infiltration basin during the winter. A completely mixed reactor idealization of the basin models this postulate as a coupled balance of dissolved and solid de-icing agents. The data suggest that 13% of the de-icing agent solids applied to the highway deposits in the basin, where it dissolves into the infiltrating groundwater with a first order decay rate of 0.0035 day~(-1).
机译：这项研究通过测量来自马萨诸塞州东南部高速公路排水系统的渗透盆地的径流和地下水的比电导率，记录了除冰剂污染的季节性变化。在记录的9年中，冬季的最高径流量和地下水电导率的数量级为10 mS cm〜（-1）。地下水的电导率下降1-2个数量级，直到其最低下降量，比径流的最低下降量高一个数量级。这种温暖的天气源行为意味着在冬季沉积在防渗池中的除冰剂固体会缓慢，季节性地溶解。盆地完全混合的反应器理想化模型将这种假设假定为溶解除冰剂和固体除冰剂的平衡。数据表明，有13％的除冰剂固体应用于盆地的公路沉积物，然后以0.0035天〜（-1）的一阶衰减率溶解在渗入的地下水中。

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