@article{oai:muroran-it.repo.nii.ac.jp:00010127, author = {吉川, 泰弘 and YOSHIKAWA, Yasuhiro and 阿部, 孝章 and ABE, Takaaki and 中津川, 誠 and NAKATSUGAWA, Makoto and 船木, 淳悟 and FUNAKI, Jungo}, issue = {2}, journal = {土木学会論文集B2(海岸工学), Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)}, month = {}, note = {application/pdf, 本研究の目的は,河川津波の塩水遡上現象を解明することである.鉛直2次元計算モデルにより,津波高さと河川流速が塩水遡上へ与える影響について検討した.1次元2層流計算モデルにより,実河川における長期的な河川津波の塩水遡上現象について検討した.本計算モデルの妥当性は,実験値と計算値の比較により確認した.本研究により以下の知見が得られた.1) 河川津波によって水位が上昇する場合,上昇した流体は必ずしも塩水ではない.2) 河川の水位を超える津波が遡上する場合には,河川水面を乗り上げて津波は遡上する.3) 津波の高さが高く河川の流れが遅いほど,塩水は上流へと遡上する.4) 河川津波による塩水先端位置は,第一波,第二波と津波が河川を遡上するタイミングで上流へと遡上し,引き波時においては直ぐさま流下しない., This study aimed to clarify the phenomenon of salinity intrusion by tsunami in river. Influence of tsunami height and flow velocity given to salinity intrusion is examined by vertical 2-dimensional unsteady flow numerical calculation. The long term phenomenon of salinity intrusion by tsunami in real river is examined by 1-dimensional 2-layer unsteady flow numerical calculation. We conducted the validity of these numerical calculations by a hydraulic experiment. The following knowledge was acquired by this study. 1) When water level goes up by tsunami in river, This fluid, which is going up may not be salt water. 2) When the tsunami exceeding water surface of the river occurs, Tsunami flows quickly on the water surface of the river. 3) In the conditions that tsunami height is high and flow velocity is late, salt water ascends to the up-stream side. 4) When the tsunami which ascended to the river flows into the down-stream side, salt water tip position does not immediately flow into the down-stream side.}, pages = {I_403--I_408}, title = {河川津波による塩水遡上現象に関する研究}, volume = {71}, year = {2015}, yomi = {ヨシカワ, ヤスヒロ and アベ, タカアキ and ナカツガワ, マコト and フナキ, ジュンゴ} }