BEACH EROSION LITERATURE 



There are listed below some recent acquisitions of the Board's 

 library which are considered to be of general interest. Copies of 

 these publications can be obtained on 30-day loan by interested 

 official agencies o 



"Mission Hydro graphique du Maroc (Mai 194-7)" 

 Department de la Marine j, France 



The results of a study of the French Moroccan Coast in the 

 vicinity of Agadir are given o The influence of a jetty on the 

 erosion of the coast is discussed in detail o A comparative 

 shore line chart is included. 



"The Reflection of Waves f3X)m a Submerged Low Reef," F, Ursell, 

 Admiralty Research Laboratory, Teddington, England. 



The problem is approached theoretically by showing that the 

 action of a low reef on the wave motion in the sea can be 

 represented by a suitable horizontal wave-maker oscillating 

 about a mean position on the sea bed. No particular mechanism 

 is specified since the wave-maker is only a theoretical device o 

 One of the conclusions is that a series of obstacles placed 

 half a wave length apart should form a very efficient reflect- 

 ing arrangement. 



"Analogy between Tides and A, 0, Electricityj" J, 7an Veen, The 

 Engineers Nov, 28 p Dec. 5, 11, 1947. 



The difficulty attending the precise calcuation of tides in 

 new channels leads the author to study the electrical analogies 

 useful in elementary tidal computations and a discussion of 

 experimental electrical solutions, A few practical examples 

 are treated. 



•'Data on Sediment Transportation and Deposition in the Canal Zonej" 

 J, So Meyers J The Panama Canal, Special Engineering Division, 



lo Co Po Memoo 75» 



A summary of available data on sediment measurements and 

 quantities of sediment removed from the existing Canal and its 

 approaches is presented. Sediment problems in the recommend- 

 ed sea-level canal are discussed. 



"Refraction of Long Swell off La Jolla, 18-30 sees," Palmer Osbom, 

 Scripps Institution of Oceanography, Wave Report No, 84., 



3A 



