Sources and Concentrations of Nitrate‐Nitrogen in Ground Water of the Central Platte Region, Nebraskaa
作者： J. R. Gormly , R. F. Spalding
DOI: 10.1111/J.1745-6584.1979.TB03323.X
关键词: Contamination 、 Fertilizer 、 Environmental chemistry 、 Denitrification 、 Hydrology 、 Groundwater 、 Nitrogen 、 Environmental science 、 δ15N 、 Fractionation 、 Nitrate
摘要: During 1976-1977 nitrate-nitrogen (NO3-N) concentrations exceeded 10 mg/1 in 183 of the 256 ground-water samples collected from parts Buffalo, Hall, and Merrick counties Nebraska. Comparison isotopic values with those potential nitrate sources suggested that primary source contamination most wells was fertilizer a small percentage contained significant NO3-N derived animal wastes. A combination two or more assumed for which could not be identified. Significant negative correlations between δ15N (-0.35 Buffalo Hall Counties) δ5N depth to water (–0.55 County) indicate denitrification is major factor fractionation nitrogen sour
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