w n Weighting factor for n'th HARBD computational direction 



x, y Horizontal coordinates, m (ft) 



/? Dimensionless bottom friction coefficient 



Y Spectral peak enhancement factor; phase shift between stress and flow 

 velocity 



Ax Grid element dimension 



e Significant wave steepness 



f\ Mean water level reading at Back Basin gage, m (ft) 



6 Wave phase; wave direction 



6 Primary wave direction, deg 



6 m Incident wave direction for wind waves and swell, deg 



k Wave number, m" 1 (ft" 1 ) 



A Complex bottom friction factor 



7V Constant, 3.1416 



<p Velocity potential 



<f? Velocity potential of the scattered wave 



0) Angular wave frequency, radians 



V Horizontal gradient operator 

 d Partial differentiation symbol 



Appendix I Notation 13 



