Salinization of urbanizing New Hampshire streams and groundwater: effects of road salt and hydrologic variability
Salinization of urbanizing New Hampshire streams and groundwater: effects of road salt and hydrologic variability
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DOI：
10.1899/09-052.1
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发表时间：
2009-12-01
影响因子：
--
通讯作者：
McDowell, William H.
中科院分区：
文献类型：
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作者：
Daley, Michelle L.;Potter, Jody D.;McDowell, William H.
自20世纪40年代以来，道路盐作为除冰剂的使用在美国冬季寒冷的地区大幅增加。尽管其普遍应用和已知的对水生和人类健康的负面影响，但很少有研究记录了道路盐对新罕布什尔州（NH）等北方气候恶劣地区溪流或地下水水质的影响。我们测量流Na+和Cl-浓度在44个盆地跨越梯度的东南部和中部NH的城市化。在所有采样流域中，河流Na+和Cl-浓度与流域%路面高度相关（Na+ r（2）= 0.75，Cl-r（2）= 0.78）。在NH东南部，浓度也与%不透水面（r（2）= 0.86 Na+和0.92 Cl-）强相关。143口私人威尔斯井的地下水盐分浓度与每口井500 m半径范围内的不透水面百分比显著相关，但解释方差的比例很小（Na+ r（2）= 0.07，Cl-r（2）= 0.10）。溪流和地下水中的盐分浓度高得惊人。Na+的平均浓度范围为
Since the 1940s, use of road salt as a deicing agent has increased substantially in regions of the US with cold winters. Despite its ubiquitous application and known negative consequences for aquatic and human health, little research has documented the effects of road salt on the water quality of either streams or groundwater in regions, such as New Hampshire (NH), with harsh northern climates. We measured stream Na+ and Cl- concentrations in 44 basins spanning a gradient of urbanization in southeastern and central NH. Among all sampled basins, stream Na+ and Cl- concentrations were highly correlated with basin % road pavement (r(2) = 0.75 for Na+, and 0.78 for Cl-). In southeastern NH, concentrations also were correlated strongly with % impervious surface (r(2) = 0.86 for Na+, and 0.92 for Cl-). Groundwater salt concentrations in 143 private wells were significantly correlated with % impervious surface within a 500-m radius of each well, but the proportion of explained variance was small (r(2) = 0.07 for Na+, and 0.10 for Cl-). Concentrations of salt in streams and groundwater were surprisingly high. Mean concentrations of Na+ ranged from