地下水を水源とする水道水に含まれる硝酸性窒素濃度の空間的分布

概要

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Nitrate concentrations in groundwater-derived potable supplies were examined for its spatial distribution. The observed nitrate concentrations were related to the agricultural nitrogen supplies. Sample waters were collected from the faucets of municipal water supplies at 16 points along the Fuefuki-river and Kane-river in the winter season. The results showed that the water qualities of two river basins differed from each other and that high nitrate concentrations were observed in the Kane-river basin. Agricultural nitrogen supplies in the Kane-river basin were estimated on the basis of groundwater base maps, land use maps, and recommended fertilizer application rates. The relation between the nitrate concentrations and the estimated annual nitrogen supplies showed that the former increased as the latter increased.
山梨大学の論文