河川結氷時の塩水遡上に関する基礎的研究

• Published in: Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
• Main Authors: 吉川, 泰弘, 赤堀, 良介, 安田, 浩保, 平井, 康幸
• Language: Japanese
• Published: 公益社団法人 土木学会 2012
• Subjects: Ice covered River; Salinity Intrusion; Experiment; Ice Sheet
• Online Access: https://kitami-it.repo.nii.ac.jp/record/7757/files/20012-03_河川結氷時の塩水遡上に関する基礎的研究.pdf; https://kitami-it.repo.nii.ac.jp/records/7757

This study aimed to clarify the fundamental phenomenon of salinity intrusion in ice covered river. We carried out salinity intrusion experiment to which model ice-sheet floats on the water surface and one-dimensional two-layered unsteady flow calculation. In this experiment, the vertical flow velocity was measured using particle image velosimetry technique. In the experiment in which ice-sheet exists, the model ice-sheet indirectly attenuated the salinity intrusion because Reynolds number does not become large. Shear stress was computed by having assigned the experiment data to one-dimensional two-layered unsteady flow equation. In both ice and no-ice condition, Interface shear stress has large influence on salinity intrusion. It was shown that the calculation model built by this study can reproduce salinity intrusion experiment. journal article