<報文>河川水質の自然要因と人為影響に関する考案 : 酒匂川水系について

概要

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As an attempt to discriminate the origin of the components in hydrosphere, analytical experiment on the components contained in river water was carried out, Samples were collected in the River Sakawa, a middle class river in Japan, between 35 km from the upper stream to the mouth of the river. The inorganic ions were measured by ion chromatography and harogenated organics were measured gas chromatography. As a result of the study, it was explained that the sea salt was carried by rain to the inner land and formed the ion proportions in the river water. It seemed to be mainly due to the difference of solubiuty to water that the rate of Na⁺Cˉ to Ca⁺⁺SO₄ˉˉin the river was lower than in the sea salt. Concerning the harogenated organics, these components are added to the river by such as air pollutants, industrial effluents and chlorinated drinking water. And compared with the molecular ratio of CHCl₃, C₂H₃Cl₃, C₂HCl₃ and C₂Cl₄ in the river water to that in the atmosphere, it makes possible to determine the degree of contribution from these three orgins.
横浜国立大学の論文