LIST OF FIGURES 

 No. Page 



1 Location map for the beach and seawalls at Oarai Harbor, Japan 12 



2 North seawall at Oarai , Japan , May 1 980 13 



3 South end of north seawall at Oarai, Japan, May 1980 13 



4 Definition sketch for coordinate system, shoreline, seawall, and 



lateral boundary conditions 16 



5 Conceptual diagram showing minus, plus, and regular areas 19 



6 Definition sketch for finite difference discretization 20 



7 Conceptual diagram showing shoreline and transport corrections at 



minus and regular cells 22 



8 Schematic diagram of the time evolution of a representative shore- 



line position coordinate 28 



9 Hypothetical example of shoreline change behind a detached break- 



water and in the presence of a seawall 33 



10 Hypothetical example of shoreline change along a curved pocket 



beach backed by a seawall . 35 



