changes. These data are compiled in Table III along with the tidal ranges 

 and qualitative estimates of sand size and profile steepness for the five 

 beaches. The beach slope, or the maximum 1-week sand level change are 

 dependent variables that presumably depend on such environmental factors 

 as the mean wave height, sand size, and tidal range. The occurrence of 

 storm tides is probably one of the more important environmental factors 

 but there is little information on this factor for the localities and 

 time of this study. 



Section V. SUMMARY 



Basic data are presented in Appendix A for changes in sand level 

 at points along 10 pipe profiles on the five beaches during January, 

 February, and March, 1968. These basic data are plotted to show change 

 in sand level at a pipe with time (Appendix B) , changes in running- 

 average sand level with time (Appendix C) , histograms of sand eleva- 

 tions at pipes along the profiles (Appendix D) , and histograms of sand 

 elevation changes at pipes along the profiles (Appendix E) . 



In addition, for the same 3 months, visual estimates of wave height, 

 period, direction, and breaker type on seven beaches (including the five 

 with pipe profiles) are given in Appendix F. 



For the five beaches with pipe profiles, the data available indicate: 



(1) Beaches on the south shore of Long Island have a more severe 

 wave climate and have greater sand elevation changes than do beaches on 

 the Atlantic coast of New Jersey. 



(2) During normal winter conditions, short-term vertical changes 

 in sand level at one point will rarely exceed 4 feet on the south shore 

 of Long Island, or 3 feet on the Atlantic coast of southern New Jersey. 



(3) To the extent that the data permit comparison between submerged 

 and subaerial parts of the profiles, the maximum, short-term, sand level 

 changes occurred more often in the vicinity of the beach face, or higher 

 on the subaerial part of the beach profile, rather than seaward of the 

 beach face. 



(4) Beach profiles tend to be flatter and sand size smaller on the 

 southerly beaches. 



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