Geochemical Characteristics and Assesment of Nitrate Nitrogen in Groundwater in Yanggu-Gun, Gangwon-Do in Korea

다국어 초록 (Multilingual Abstract)

An analysis of groundwater quality is significant for monitoring and managing water contamination and groundwatersystem. For the purpose of those, the geochemical characteristics of groundwater were studied over the concern for waterquality, water type and origin of nitrate nitrogen. Total colony counts were detected in 11 out of 20 samples, and theaverage value was 31.73 CFU/ml. Range and average of NO3-N concentrations were 0.9~24.0 mg/L and 8.3 mg/L. Allgroundwater types were found to be Ca2+-HCO3−. The range and average of NO3-N were 0.2~17.4 mg/L and 8.7 mg/L,and those of δ15N were 1.7~8.9‰, and 5.0‰. Careful consideration is required for evaluating the origin of nitrogen whenNO3-N concentration is low. In general, noticeable difference between rockbed and alluvial water was not found. Theranges of nitrate origins by chemical fertilizer, livestock manure and domestic sewage, and natural soil were 29.6~76.4%,14.2~58.9% and 2.6~7.0%, and the average values of those were 57.4%, 37.4%, and 5.3%, respectively. Origin of nitratewas affected by more chemical fertilizer than the other parameters. Rockbed water was more affected by chemicalfertilizer than alluvial water.

참고문헌 (Reference)

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