3. Longshore transport which produces shoaling in protected waters 

 could produce more shoaling than predicted merely because of looser 

 packing of sand grains. The magnitude of this increase is expected to 

 be on the order of 10 to 20 percent and should not be greater than 42 

 percent. 



4. Field studies of longshore transport should include measurements 

 to determine the void ratio (eq. 7), or equivalently a' (eq. 8), in the 

 littoral zone and in protected waters. 



14 



