PROBABILITY OF EXCEEDING THE CRITICAL SHEAR STRESS FOR SAND MOTION IN SPECIFIC WAVE AND CURRENT CONDITIONS

Proceedings of the International Conference on Coastal Engineering

Muk Chen Ong¹  Dag Myrhaug²  Alf Tørum²  Øivind Artsen²  Pierre-Yves Henry² 

[1] MARINTEK;Norwegian University of Science and Technology

关键词: threshold of motion;    random waves;    critical shear stress;   

DOI  :  10.9753/icce.v33.sediment.4

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

This study is focusing on the threshold of sand motion under random waves combined with a following current. The analysis is based on some flume experiments realized over a natural sand bed for different flow conditions (waves and currents). The main result comes as a map of the probability to exceed the threshold of sand motion, as a function of a wave and a current mobility parameter. These observations are compared to methods predicting the bed shear stress using an equivalent monochromatic wave, and links between the probability of exceeding the critical shear stress for initiation of sand motion and the calculated maximum bed shear stress are found.

【 授权许可】

Unknown