PART V: STORM-INDUCED BEACH EROSION 
Introduction 
126. An important goal of this study is development of a quantitative 
means of investigating the potential impact of storm events on the integrity 
of an existing beach complex. Specifically, alternative beach fill berm con- 
figurations designed to protect the seawall along the open and approximately 
straight coastal area between Sea Bright and Ocean Township will be the sub- 
ject of this chapter. 
127. This goal can be realized through the development of a one- 
dimensional numerical model based on certain simplifying assumptions which 
are particularly appropriate for the project area. These assumptions are de- 
scribed below. The analysis involves development and application of a numeri- 
cal model to estimate shoreline recession caused by storms of foreseeable 
intensity. 
128. Although modeling procedures have recently been developed for 
numerically simulating the dynamic response of beaches to storm events, this 
methodology has not yet been extended for the simulation of storm-induced ero- 
sion of beaches protected by vertical seawalls. The purpose of this section 
is to present the modified model and methodology developed for accomplishing 
this task. The final product represents the first application of this new 
technology in a form which will, in the future, be available for District use. 
It is noted that scour at the foot of a seawall is not addressed in the model. 
129. Following a brief description of the basic theory of the storm- 
induced beach erosion model, a demonstration of the verification of the model 
will be made. Although appropriate data for this purpose are sparse, compari- 
sons of pre- and post-storm surveys with model predictions demonstrate that 
the model is capable of producing realistic estimates of both erosion volume 
and berm recession. This comparison is followed by a description of the 
approach used to incorporate storm surge model information in the beach ero- 
sion model, which results in a means of comprehensively evaluating various 
beachfill configurations. Design beach profiles are evaluated by assessing 
each option with respect to a computed beach recession-recurrence interval 
curve. Included is an empirical estimate of the natural longshore variability 
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