Influences of land use on water quality of a diverse new England watershed

被引：107
|
作者：
Rhodes, AL [1 ]
Newton, RM [1 ]
Pufall, A [1 ]
机构：
[1] Smith Coll, Dept Geol, Northampton, MA 01063 USA
来源：
ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2001年 / 35卷 / 18期
关键词：
D O I：
10.1021/es002052u
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Analysis of variations in major ion chemistry in the Mill River watershed reveals the importance of anthropogenic activities in controlling streamwater chemistry. Average concentrations of NO3- and SO42- show a positive correlation with percent catchment area altered by human land uses, and concentrations of Cl- increase with road density. Water removal from municipal reservoirs increases the downstream concentration of NO3- and SO42- over that predicted by land use changes, showing that removal of high quality upstream water concentrates pollutants downstream. In salt-impacted streams, Cl- exceeds Na+ by 10-15% due to cation exchange reactions that bind Na+ to soil. The not effect of nonpoint source pollution is to elevate ANC in the most developed areas,which impacts the natural acidity of a large swamp. The sum of base cations (C-B) exceeds ANC for all samples. Plotting C-B against ANC and subtracting Cl- quantifies the impact of road salt from the impact of the addition of strong acids.
引用
收藏
页码：3640 / 3645
页数：6
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