FIELD VERIFICATION OF A NUMERICAL MODEL OF BEACH TOPOGRAPHY CHANGE DUE TO NEARSHORE CURRENTS, UNDERTOW AND WAVES

Proceedings of the International Conference on Coastal Engineering

Masahito Tsuru²  Akira Watanabe¹  Takuzo Shimizu² 

[1] Dept. of Civil Eng., Univ. of Tokyo;Penta-Ocean Construction Co. Ltd.

关键词: numerical model;    field verification;    beach topography;    beach change;    nearshore current;    undertow;   

DOI  :  10.9753/icce.v24.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A practical method for estimating the undertow velocity and its direction is developed and verified on the basis of field measurement data. It is found that a simple vector addition of nearshore current and undertow gives a good approximation. The actual bottom topography change during a year is simulated by the 3-D beach evolution model taking into account the cross-shore sediment transport due to waves and undertow as well as the transport due to nearshore currents. The results of both measurements and calculations show that the sediment transport due to nearshore current is predominant and the contribution of cross-shore sediment transports is cancelled for a long-term beach evolution.

【 授权许可】

Unknown