92 



a) Volume of Sand "Generated" by Horizontal Retreat, R, of 

 Equilibrium Profile Over Vertical Distance (h^ +B) 



AV =SL 



Depth of Effective lUlotion 



b) Volume of Sand Required to Maintain an Equilibrium Profile 

 of Active Width, L, Due to a Rise, S, In IVIean Water Level 



Fig. 7.2. Components of Sand Volume Balance Due to Sea Level Rise and 

 Associated Profile Retreat According to Bruun Rule. 



