beach configuration, storm surge characteristics, and time. The prediction is 
accomplished by relating relevant characteristics of the storm with offshore 
sediment transport, which can then be related to erosion and recession. A 
complete treatment of the basic theory and methodology of the model is pre- 
sented by Kriebel and Dean (1985a,b) and in the documentation of the original 
model (Kriebel 1984a,b). 
133. As previously noted, one of the primary advantages of the model is 
its ease of application. This is due, in part, to an assumption that the 
entire area to be modeled can be schematized into three distinct regions. 
These regions, shown in Figure 21, are as follows: 
a. A dune area defined by a constant height and constant face 
slope. The distance to the base of the dune face is specified 
as a distance from an arbitrary reference point. 
Io 
A berm area defined with an initial horizontal width (which 
can be specified as zero), height, and face slope. This area 
extends from the base of the dune face to a location equiva- 
lent to 0.5 ft (0.15 m) below mean sea level (MSL). 
An offshore area defined according to the equilibrium beach 
profile concept in which the depth h monotonically increases 
with distance offshore x according to the following 
relationship: 
10 
lay ef xe/3 (6) 
DUNE FACE SLOPE 
BERM WIDTH 
BERM FACE SLOPE 
DUNE HEIGHT =| 
HEIGHT 
OFFSHORE 
Figure 21. Schematized model area 
67 
