MODEL EXPERIMENT ON DEFORMATION OF COASTAL DUNES BY TSUNAMI
-
- OKUTANI Tetsuya
- 京都大学大学院工学研究科社会基盤工学専攻
-
- HIRAISHI Tetsuya
- 京都大学 防災研究所
Bibliographic Information
- Other Title
-
- 津波による海岸砂丘の変形に関する模型実験
- ツナミ ニ ヨル カイガン サキュウ ノ ヘンケイ ニ カンスル モケイ ジッケン
Search this article
Abstract
<p> When a tsunami occurs, geographical features influence on the wave pressure characteristics. Its variation should be considered for the tsunami-resistant design of seawalls. In the case that coastal dunes exist between the seawall and shoreline, it is assumed that the tip of a tsunami make dunes deform and then the subsequent flow passes over the dune which have a changed geographical condition. Although several studies on wave force due to a tsunami have been conducted, there are few researches on the deformation of a dune itself. Then, the hydraulic experiments were conducted, in which a solitary wave reproducing the tip of a tsunami was acted on a dune model made of silica sand. As results of the experiments, it was clarified that the dune was scoured twice by the solitary wave because of reflected waves. The existence of sand dune caused the variation of the maximum water depth.</p>
Journal
-
- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
-
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 76 (2), I_403-I_408, 2020
Japan Society of Civil Engineers
