Nitrate concentrations in Karst springs in an extensively grazed area
Nitrate concentrations in Karst springs in an extensively grazed area
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DOI：
10.1111/j.1752-1688.1995.tb03397.x
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发表时间：
1995-08
影响因子：
2.4
通讯作者：
D. G. Boyer;G. C. Pasquarell
中科院分区：
文献类型：
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作者：
D. G. Boyer;G. C. Pasquarell
岩溶地区农业活动对水质的影响是阿巴拉契亚地区资源管理的重要考虑因素。喀斯特地区约占该地区陆地面积的18%。据估计，该地区三分之一的农场、牲畜和农业市场价值位于喀斯特地区。硝酸盐浓度进行了测量，在几个岩溶泉在西弗吉尼亚州东南部，以确定对岩溶地下水系统的硝酸盐污染的畜牧业的影响。岩溶盆地与79%，51%，16%和0%的农业平均硝酸盐浓度分别为15.8，12.2，2.7和0.4毫克/升。硝酸盐浓度和百分比农业用地之间存在很强的线性关系。中值硝酸盐浓度增加约0.19毫克升-1，每增加百分之农业用地。天气模式也被发现显着影响硝酸盐浓度的中位数和这些浓度的时间变异性。较低的硝酸盐浓度和较低的时间变异性，观察到在严重干旱期间。得出的结论是，农业显着影响岩溶含水层中的硝酸盐浓度。最佳管理做法可能是保护地下水资源的一种方法。
: The impact on water quality by agricultural activity in karst terrain is an important consideration for resource management within the Appalachian Region. Karst areas comprise about 18 percent of the Region's land area. An estimated one-third of the Region's farms, cattle, and agricultural market value are located on karst terrain. Nitrate concentrations were measured in several karst springs in Southeastern West Virginia in order to determine the impact of animal agriculture on nitrate pollution of the karst ground water system. Karst basins with 79, 51, 16, and 0 percent agriculture had mean nitrate concentrations of 15.8, 12.2, 2.7, and 0.4 mg/l, respectively. A strong linear relationship between nitrate concentration and percent agricultural land was shown. Median nitrate concentration increased about 0.19 mg l-1 per percent increase in agricultural land. Weather patterns were also found to significantly affect the median nitrate concentrations and the temporal variability of those concentrations. Lower nitrate concentrations and lower temporal variability were observed during a severe drought period. It was concluded that agriculture was significantly affecting nitrate concentrations in the karst aquifer. Best management practices may be one way to protect the ground water resource.