papers primarily concern modeling and the planning process. The paper by 

 Nicholas C. Kraus develops a general framework for understanding the role of 

 numerical models of beach change in the planning and design process for shore 

 protection, and it also serves as an introduction to the technical papers 

 which follow. The paper by Steven A. Hughes describes an actual project and 

 the application of various types of models, illustrating some of the 

 principles described in the preceding paper. 



The five remaining papers treat technical aspects of numerical simula- 

 tion of beach change, emphasizing procedures and results rather than mathe- 

 matical details. In development of the technical papers, an effort was made 

 to present the state of the art in both research and application of the 

 models. The paper by Hans Hanson and Nicholas C. Kraus presents the first 

 description of a recent advance in shoreline change modeling, the capability 

 to describe shoreline change produced by detached breakwaters that transmit 

 wave energy, and it includes tests of the model and verification for Holly 

 Beach, Louisiana. The paper by Mark B. Gravens describes an intensive 

 application of the shoreline change model to investigate the effect of 

 construction of a proposed entrance channel on the beach at Bolsa Chica, 

 California. The shoreline change project at Bolsa Chica is put in a broader 

 perspective of a multitasked study in the paper by Steven A. Hughes. 



The final three papers concern modeling of storm- induced beach erosion. 

 The two papers written by Magnus Larson and Nicholas C. Kraus describe tests 

 of a newly developed model of storm- induced beach and dune erosion which has 

 some capability to simulate beach recovery after storms. They apply the model 

 to examine the relative behavior of two generic types of beach-fill cross- 

 sections for protection against attack by hypothetical storms and also discuss 

 the methodology of applying this emerging technology. In the third paper on 

 storm erosion, Norman W. Scheffner summarizes an application of a model of 

 storm- induced beach erosion to the north New Jersey coast. He takes a 

 statistical approach by which dune erosion-frequency of occurrence curves are 

 developed by driving the model with waves and water levels available from a 

 large data base encompassing both hurricanes and northeasters. 



Nicholas C. Kraus 

 Editor 



