LAND 



Cliff, Dune, and 

 Backshore Erosion 



Beach Replenishment 



Rivers 



Dune and Backshore 

 Storage 



Winds 

 (supply and deflatio; 



Inlets and Lagoons, 

 Including Overwash 



Mining 



OCEAN 



offshore Slope 

 (source or sink?) 



Submarine Canyon 



Dredi 



ging 



Calcium Carbonate 

 (production and loss) 



Longshore Currents, 



Tidal Currents, and 



Longshore Winds 



Figure 4-49. Materials budget for the littoral zone. 



4-127 



