LIST OF NOTATIONS 



a - Long axis of a particle or boundary reference - axis distance. 



A - Cross-sectional area of an immersed body 



b - Intermediate axis of a particle 



c - Short axis of a particle 



C - A numerical resistance coefficient 



C n - Drag coefficient of a particle (for an infinite, quiescent fluid) 



C Q - Drag coefficient corresponding to a given R value, 

 n 



d - Nominal diameter of a particle (the diameter of a sphere having the 

 same volume as the particle) . 



D - Diameter of an immersed particle 



D - Diameter of a sand grain as determined from "equilibrium" criterion 



F - Force resisting motion of an immersed body 



Fg - Buoyancy force 



F - Gravitational force 

 S 



F - Fluid resistance force 

 r 



G - Gravitational constant 



h - Water depth 



H - Wave height in deep water 



k - Wave number 



k e - Effective hydraulic roughness length 



L_ - Wave length in deep water 



M - Mean settling velocity of sand sample (as measured in settling tube) . 



M z - Mean size (in nominal diameter) of a sand sample. 



P - Probability level indicated by a statistical test or percentile of output 

 curve from sand analyzer. 



r - Radius of spherical particle 



R g - Reynolds number 



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