TIME RANGE 



HOURS 



(ONE 



STORM) 



_ Q 



< LU CO 



cc cc cc 



Lu Q ^ 



> ^ LU 



LU 3 ^ 



CO x ^ 



MONTHS 

 (SEASON) 



YEARS 



1-5 



5-10 



10-20 



PROFILE CHANGE | (SBEACH) 



3-D 



MULTI-CONTOUR 

 LINE 



r ■ 





SHORELINE 

 (GENESIS) 







< 

 <-> 



1- 



> 

 -J 



< 

 z 



< 



i_i 





5 > 



H X 



O H 



> c 



I - z 



o c 



m -a 



S3 



CO 

 y m r^ 



o 



m 



m = 



o p 



H — 



m Z 



O rn 



BEACH CHANGE PREDICTION MODELS 



CLASSIFICATION BY SPATIAL AND TEMPORAL SCALES 



Fig. 1. Classification of beach change models 



models can calculate with some reliability beach erosion produced by large 

 storms, considerable research remains to be done to extend them to simulate 

 major morphological features of the profile, such as bars and berms , and beach 

 recovery (Larson 1988, Larson, Kraus , and Sunamura 1988, Kraus and Larson 

 1988, Larson and Kraus 1989) and hence become true "profile change" models. 

 Shoreline change model 



The shoreline change numerical model is a generalization of analytical 

 shoreline change models. This ID model enables calculation of the shoreline 

 response to wave action under a wide range of beach, coastal structure, wave, 

 and initial and boundary conditions, and these conditions can vary in space 



P. 



