Seepage effects on bedload sediment transport rate by random waves

OCEAN ENGINEERING

卷:82

Article

Myrhaug, Dag¹  Holmedal, Lars Erik¹  Ong, Muk Chen² 

[1] Norwegian Univ Sci & Technol, Dept Marine Technol, NO-7491 Trondheim, Norway

[2] Norwegian Marine Technol Res Inst MARINTEK, NO-7450 Trondheim, Norway

关键词: Bed load transport;    Seepage flow;    Random waves;    Stochastic method;   

DOI  :  10.1016/j.oceaneng.2014.02.020

来源: Elsevier

【 摘 要 】

The mean net bedload sediment transport rate beneath random waves is predicted taking into account the effect of seepage flow. This is achieved by using wave half-cycle bedload sediment transport formulas valid for regular waves together with a modified Shields parameter including the effect of seepage flow. The Madsen and Grant (1976) bedload sediment transport formula is used to demonstrate the method. An example using data typical to field conditions is included to illustrate the approach. The analytical results can be used to make an assessment of seepage effects on the mean net bedload sediment transport based on available wave statistics. Generally, it is recommended that a stochastic approach should be used rather than using the rms values in an otherwise deterministic approach. (c) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free