4. In the next section each of the three general problem areas will be 

 discussed. Existing methods to repair or rehabilitate coastal structures to 

 alleviate or eliminate problems caused by wave runup and overtopping will be 

 presented. New methods which in most cases lend themselves to computer assis- 

 tance will build on existing field expertise. Much of the existing informa- 

 tion is oriented toward new construction rather than rehabilitation so exist- 

 ing methods need to be modified and will require additional laboratory work to 

 calibrate the new approach relative to existing structures. 



