1951. (V.F. 1091 series 14-6) 



Effect of impeiTneable and permeable groins was determined by 

 comparing topography of a straight, unobstructed beach in equilib- 

 rium with a beach that had reached equilibrium after a system of 

 groins had been installed. Model tests showed that permeable 

 groins retained from 11% to 26% of the sand used in the experiment; 

 far less effective than for impermeable groins. Dye tests were 

 employed to trace the pattern of littoral movement through permeable 

 groins. 



Key Words - Laboratory/Model/Experimental/Permeable/ Impermeable/ 

 Erosion/Accretion/High/Low/System/Single/Photographic 



"Revere Beach, Mass., Beach Erosion Control 

 Study" 



U. S. Army Corps of Engineers, House Docu- 

 ment No. 167, 82nd Congress, 1st Session, 

 May, 1951. 



5105GR0001 



Key Words - House Document/Not Annotated/ 



"Quincy Shore Beach, Mass., Beach Erosion 

 Control Study" 



U. S. Army Corps of Engineers, House Docu- 

 ment No. 145, 82nd Congress, 1st Session, 

 May, 1951. 



5105GR0002 



Key Words - House Document/Not Annotated/ 



"Revere Beach, Mass., Beach Erosion Control 

 Study" 



U. S. Army Corps of Engineers, House Docu- 

 ment No. 146, 82nd Congress, 1st Session, 

 May, 1951. 



5105GR0003 



Key Words - House Document/Not Annotated/ 



"Beach Protection Engineers Attempt to Out- 

 wit Nature at Presque Isle, Peninsula" 

 Forney, F. H. , and Lynde, G. A., Civil 

 Engineering , ASCE, Vol. 21, No. 9, Sept., 



5109GR0001 



42 



