D 

 d 



max 



g 

 H 



S = -10.2/2(13 



T 



t 



Umax(-d) 



SYMBOLS AND DEFINITIONS 



median sand-grain diameter 



mean water depth 



maximum water depth for sand motion with given wave height 

 and period 



acceleration due to gravity 



wave height 



minimum wave height for sand motion with given depth and wave 

 period 



linear wavelength for given depth and wave period 



subscript denoting critical velocity with vigorous near-bed 

 mixing 



Stokes parameter measuring wave nonlinearlty 



2tt 



wave period = 



subscript denoting transitional critical velocity 



maximum linear wave- induced horizontal velocity near the bed 



V subscript denoting critical velocity with viscous near-bed layer 

 y' = (Ps-p)/p normalized immersed sediment density 



6 weighting factor 



e weighting factor 



V kinematic fluid viscosity 



E, horizontal amplitude of near-bed fluid orbit 



p fluid mass density 



Pg sediment mass density 



0) angular wave frequency 



