PREDICTION OF DEVELOPMENT OF SAND SPITS AND CUSPATE FORELANDS WITH RHYTHMIC SHAPES CAUSED BY SHORELINE INSTABILITY USING BG MODEL

Proceedings of the International Conference on Coastal Engineering

Shiho Miyahara¹  Masumi Serizawa¹  Takaaki Uda² 

[1] Coastal Engineering Laboratory Co., Ltd.;Public Works Research Center

关键词: shoreline instability;    beach changes;    sand spits;    cuspate forelands;    BG model;    wave-sheltering effect;    self organization;   

DOI  :  10.9753/icce.v33.sediment.35

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

The BG model (a three-dimensional model for predicting beach changes based on Bagnold’s concept) was used to simulate the shoreline evolution caused by the high-angle wave instability discussed by Ashton et al. Three calculations were carried out: the wave direction was assumed to be obliquely incident from 60˚ counterclockwise (Case 1) or from the directions of ±60˚ with probabilities of 0.5:0.5 (Case 2) and 0.65:0.35 (Case 3), while determining the incident wave direction from the probability distribution at each step. The three-dimensional development of multiple sand spits and cuspate forelands with rhythmic shapes was successfully explained using the BG model. The results of the previous study conducted by Ashton et al. were reconfirmed and reinforced.

【 授权许可】

Unknown