RH hydraulic radius 



S slope 



Se energy slope 



s.g. specific gravity 



T wave period 



U steady flow velocity 



u horizontal velocity 



u, bottom velocity 



um mass transport velocity 



Uxq critical bottom-shear velocity for initial sediment motion 



Y volume of sediment particle 

 W settling velocity 



X horizontal coordinate axis 



Y , vertical coordinate axis 



Y vertical distance between beach crest and bar or step 

 a proportionality symbol 



B beach profile discontinuity distance 



Y specific weight 



Y' (y - Yf)/Yf> relative specific weight 



Yf specific weight of fluid 



Y specific weight of sediment particles 

 X horizontal scale ratio 



y vertical scale ratio 



Y fluid kinematic viscosity 



IT 3.14159 (numerical constant) 



