Structural alternatives in addition to fill were to be considered. The present study 

 builds upon a preliminary study performed by Coastal Planning & Engineering, 

 Inc. (CP&E) (1997). which developed a design involving construction of groins 

 and placement of till to increase the replenishment cycle to an estimated 3 years. 

 The present study included a more comprehensive analysis of the local wave and 

 shoreline data, as well as evaluation of a wider range of alternatives including 

 T-head aroins. 



Units of Measurement 



In this report, general discussion of wave data is made in SI (metric) units in 

 conformance with standard oceanographic practice. However, because the main 

 body of this report concerns an ongoing project for which engineering quantities 

 have been and continue to be expressed in American Customary (non-SI) Units, 

 such quantities are expressed in non-SI units. A table for conversion from non-SI 

 units of measurement to SI (metric) units is presented on page viii. 



Organization of this Report 



This report is the second in a series on the topic of accelerated erosion rates 

 of the beach fill at Monmouth Beach, New Jersey. The first report identifies 

 factors contributing to the area of accelerated erosion at Monmouth Beach. The 

 present report extends the conceptual recommendations of the first report by 

 developing and analyzing shore-protection alternatives and estimating required 

 stone sizes and volumes for the recommended alternatives. 



This report consists of five chapters. Chapter 1 introduces the study site and 

 objectives of the study. Chapter 2 gives a summary of the acting coastal 

 processes and includes an analysis of directional wave data recently acquired in 

 the vicinity of the site, information on tidal datums, and a description of the 

 beach profile and sediments. Chapter 3 describes the procedures and results in 

 development and evaluation of functional designs for increasing the renourish- 

 ment interval. It covers an analysis for obtaining an empirical criterion for groin 

 performance, numerical simulations of longshore sand transport and shoreline 

 change, and selection of recommended alternatives. Chapter 4 contains the 

 analysis procedure to develop construction details, in particular stone sizes and 

 volume, for the groin extension identified in one of two recommended alterna- 

 tives from Chapter 3. Chapter 4 also contains percent-damage curves for the 

 groin extension. Chapter 5 gives conclusions and recommendations arrived at in 

 this study. 



Appendix A lists statistical summaries of the wave analysis for the 

 Long Branch, New Jersey, directional wave gauge measurements. 



Chapter 1 Introduction 



