River Flow Conditions and Dynamic State Analysis of Arsenic in Toyohira River
-
- TATSUMI Kenichi
- Division of Environmental Resources Engineering, Graduate School of Engineering, Hokkaido University
-
- JIN Kazuo
- Department of Health and Environmental Science, Hokkaido Institute of Public Health
-
- MAGARA Yasumoto
- Faculty of Urban Environmental Engineering, Graduate School of Engineering, Hokkaido University
-
- TACHIBANA Harukuni
- Division of Environmental Resources Engineering, Graduate School of Engineering, Hokkaido University
Bibliographic Information
- Other Title
-
- 豊平川における河川流況とヒ素の動態解析
- トヨヒラガワ ニ オケル カセン リュウキョウ ト ヒソ ノ ドウタイ カイセキ
Search this article
Abstract
Hot-spring water and mine effluent flow into the Toyohira River, which runs through the center of Sapporo, Japan. In the river, the concentrations of components from hot-spring water and mine effluent change according to the flow regime. This phenomenon must be addressed in water quality management. We found that when the water level is low, the arsenic originating from hot-spring water is washed out as a point-source (dilution) pollutant or together with polluted water with a constant arsenic concentration. In the region downstream of the dam, the arsenic washed out during flood is a non-point-source (diffuse) pollutant. The flow-regime-dependent difference in the washout component is attributed to arsenic accumulation in the bottom mud during low water levels. The arsenic concentration in the bottom mud is high in the region downstream of Jozankei, a hot-spring resort. The arsenic accumulated in large amounts in the dam is stably supplied to the river. During flood, however, the agitation of the bottom mud enhances the washout of suspended arsenic, and the concentration of suspended arsenic washed out is high.
Journal
-
- Journal of Japan Society on Water Environment
-
Journal of Japan Society on Water Environment 28 (2), 101-107, 2005
Japan Society on Water Environment
- Tweet
Details 詳細情報について
-
- CRID
- 1390282680057084160
-
- NII Article ID
- 10014378813
-
- NII Book ID
- AN10372439
-
- COI
- 1:CAS:528:DC%2BD2MXjtFaqsbw%3D
-
- ISSN
- 18813690
- 09168958
-
- NDL BIB ID
- 7247442
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed