地球化学
Online ISSN : 2188-5923
Print ISSN : 0386-4073
ISSN-L : 0386-4073
報文
秋田県渋黒川–玉川水系における流入する酸性温泉水と河川水の混合過程についてのストロンチウムおよび硫黄同位体比ならびに溶存化学成分を用いた解明
若狭 幸石山 大三松葉谷 治佐藤 比奈子申 基澈中野 孝教
著者情報
ジャーナル フリー

2015 年 49 巻 3 号 p. 153-161

詳細
抄録

In the Shibukuro and Tama River system, Akita, where river water is acidified by inflow of acidic hot spring water, mixing process of confluent river water is explained by changes in the isotope ratios of Sr and S as well as the chemical composition of dissolved components. Based on the relationships between Sr and S isotopic ratios and their reciprocal concentrations, the mixing ratio of waste water from a neutralization plant of acidic hot spring water with river water of Shibukuro River was estimated as 1 to 1, and at the confluence of Shibukuro and Tama Rivers the mixing ratio of these two was estimated to be 3 to 7 or 4 to 6. These mixing ratios were mostly consistent with those obtained from the concentrations of dissolved chemical components. These consistent mixing ratios suggest that the chemical composition of river water was mainly controlled by the mixing of the waste water and the tributary river waters, and the influence of precipitation of insoluble salts was negligible. The contribution of the waste water was about 10% at Tose located downstream from the confluence of Shibukuro and Tama Rivers.

著者関連情報
© 2015 日本地球化学会
前の記事 次の記事
feedback
Top