Case : Groin of Case design. 



Central America : Refers to the shores of Central America. 



Concrete : Denotes that the groins are built in part or wholly of 

 concrete. 



Const-problems : Any problems encountered during groin construction 

 or as a result of faulty construction. 



Const -procedure : Construction, process and method. 



Comer-groins : A type of groin which is built on the line that 

 bisects the angle between the beach and a groin. 



Du- PI at -Taylor : Groins of Du-Plat-Taylor design. 



Economics : Actual, appropriated, or projected costs of groin 

 construction and maintenance. 



Erosion : Refers to shore erosion prior to or as a result of groin 

 construction. 



Europe : Refers to the shoreline of all European countries bordering 



the Atlantic Ocean, North Sea, Baltic Sea, and northern shore 

 of the Mediterranean Sea. 



Experimental : Reports which discuss experimental studies on groins 

 either in the field or laboratory. 



Field : Actual in-the-field studies as opposed to laboratory studies. 



Geometric-shapes : Any material used to construct a groin or a 



component section of a groin that has geometric 

 regularity«e.g. cellular groin, tetrapods. 



Great Lakes : Refers to the shoreline of the Great Lakes. 



Haupt : Groin of Haupt design. 



Hawaiian Islands : Refers to the shores of the Hawaiian Islands. 



High : Groins which are of sufficient height as to impede the passage 

 of littoral drift and overtopping of waves at high tide. 



House Document : Refers to U. S. Congress House of Representatives' 

 Reports which contain pertinent data on groins. 



Impermeable : Groins which prevent littoral drift from passing through 

 the structure. 



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