MECHANISM OF BEACH PROFILE DEFORMATION DUE TO ON-OFFSHORE SAND DRIFT

Proceedings of the International Conference on Coastal Engineering

Yuichi Iwagaki¹  Wi-Gwang Pae¹ 

[1] Dept. of Civil Eng., Kyoto University

关键词: beach profile;    profile deformation;    crossshore transport;    sand drift;   

DOI  :  10.9753/icce.v19.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

In the present study, two-dimensional laboratory experiments were performed to investigate the sediment transport due to waves on a fixed sloping beach. Polystyrene particles and glass balls were used as tracers to determine the mass transport velocity near the bottom and the net transport velocity of sediment moving on an impermeable slope. Relationships between the mass transport velocity of water and the net sediment transport velocity are investigated experimentally. The mechanism of two-dimensional beach deformation from an initial uniform slope toward an equilibrium profile due to bed-load movement is discussed on the basis of spatial distributions of the net sediment transport velocity. In addition, some results of experiments using a movable bed are presented to confirm the validity of a beach deformation model derived from the discussion of the tracer experiments.

【 授权许可】

Unknown