Abstract
The dissipation of regular and irregular waves on a muddy bed with the existence of following and opposing currents are investigated through a series of wave flume laboratory experiments. The commercial kaolinite is used as fluid mud layer. The laboratory results show the increase of both regular and irregular wave heights due to opposing currents. On the other hand, the following currents result to the decrease of the wave heights. In the numerical treatment, the deformation of wave due to current was first calculated based on the conservation equation of wave action and then the attenuation of this deformed wave due to the muddy bed is simulated by a multi-layered wave-mud interaction model. Acceptable agreements were observed between the numerical results and laboratory data.
Highlights
Waves and current interaction is a complex phenomenon in coastal and estuarine areas
The irregular wave interaction with opposing and following currents and the spectral changes of waves passing over a muddy bed are studied throughout a series of wave flume experiments
It is revealed that the exponential decay is a good estimation for regular and irregular wave heights attenuation over muddy beds
Summary
Waves and current interaction is a complex phenomenon in coastal and estuarine areas. Soltanpour et al (2008) proposed a numerical wave-mud-current interaction model to simulate wave transformation and mud mass transport with presence of a uniform current using the conservation equation of wave action by Thomas (1981) They compared the results of their numerical model with the laboratory data of An and Shibayama (1994). The radiation stress and wave action equations are identical for steady state Many researchers followed these two theories to investigate different aspects of regular wave-current interaction (e.g., Whitham 1962; Dalrymple 1974; Peregrine 1976; Brevik and Aas 1980; Thomas 1981). The plus and minus signs of velocities indicate following and opposing currents, respectively
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
