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スルースゲートを用いた弾力的な塩水遡上の制御手法に関する基礎的研究 FLEXIBLE CONTROL OF DENSITY CURRENT MIGRATION BY USING SLUICE GATE 赤堀, 良介 吉川, 泰弘 安田, 浩保 open access c 2011 公益社団法人 土木学会 density current sluice gate PIV Controlling adverse density currents has been an important issue on water quality and ecosystems of brackish water regions. This study proposes to apply sluice gate for flexible control of density current migration in open channels. Hydraulic characteristics of density flows around a sluice gate are investigated by flume experiments employing the Particle Image Velocimetry technique and numerical calculations by a Large Eddy Simulation model. The results show that the behavior of density front migration under a sluice gate is dominated by internal Froude number of both fresh water and salt water layers, and entrainment of salt water in a downstream region of a dike is influenced by evolution of instantaneous flow structures in a fresh water layer. 公益社団法人 土木学会 2011-03 jpn journal article VoR https://kitami-it.repo.nii.ac.jp/records/7751 http://doi.org/10.2208/jscejhe.67.I_1585 土木学会論文集B1（水工学） 67 4 I_1585 I_1590 https://kitami-it.repo.nii.ac.jp/record/7751/files/2011-03_スルースゲートを用いた弾力的な塩水遡上の制御手法に関する基礎的研究.pdf application/pdf 2.5 MB 2016-11-22