A NUMERICAL STUDY ON THE RELATION BETWEEN UNDERWATER LANDSLIDE SHAPE AND TSUNAMI GENERATION
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- YUHI Masatoshi
- 金沢大学 理工研究域環境デザイン学系
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- UENO Takuya
- 金沢大学大学院 自然科学研究科環境デザイン学専攻
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- YAMAMOTO Akinori
- 金沢大学大学院 自然科学研究科環境デザイン学専攻
Bibliographic Information
- Other Title
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- 海底地滑りによる津波の発生と地滑り土塊形状の関係に関する数値解析
- カイテイ ジスベリ ニ ヨル ツナミ ノ ハッセイ ト ジスベリ ツチクレ ケイジョウ ノ カンケイ ニ カンスル スウチ カイセキ
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Abstract
A numerical model was developed for the tunami generation and evolution induced by submarine landslide. The numerical model is developed based on a finite-volume Godunov-type high-resolution scheme for a well-balanced formulation of nonlinear shallow water equations with a source term arising from bottom motion. The comparison with vertically two-diensional experimental results indicate that the model is able to accurately reproduce the wave height distribution and time history of free surface elevation. The influence of the geometry of landslide is then investigated. The results for a series of numerical computations revealed that the proper setting of initial depth and shape of landslide is important. The comparison with horizontally two-dimensional experiments demonstrated that the numerical results well reproduced the leading depressive wave. The influence of two-dimensionality was shown to be stronger when the model width is smaller.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 73 (2), I_283-I_288, 2017
Japan Society of Civil Engineers