@article{oai:kitami-it.repo.nii.ac.jp:00007753, author = {矢野, 雅昭 and 吉川, 泰弘 and 平井, 康幸 and 田中, 茂信}, journal = {河川技術論文集}, month = {Jul}, note = {This study proposes a retarding basin to be constructed at a downstream site of a river to allow tsunamis to flow through side-spill weirs into the retarding basin, lowering the wave height and energy as a measure of preventing river run-up during a tsunami. In order to demonstrate an effect of a retarding basin, a hydraulic model experiment was conducted. The river chosen for the experiment runs through Banda Aceh, an area devastated by the earthquake in the Indian Ocean of Sumatra. A model of the river was created on a vertical scale of 1:50 and a horizontal scale of 1:600. As a result, the retarding basin reduced the height of the tsunami by 1.5 cm (0.75 m full scale) at the point of 1.2 m upstream from the retarding basin (720 m full scale). It could also delay the arrival time of the tsunami by up to 0.35 seconds (30 seconds full scale). The duration of the tsunami’s high water level was reduced by up to 1.6 seconds (136 seconds full scale). And these reduction effects are proportional to amount of water flowed into the retarding basin.}, pages = {371--376}, title = {遊水地による津波の河川遡上低減効果に関する水理実験}, volume = {17}, year = {2011} }