more complicated than has generally been realized. Along with 

 analysis of flow patterns, characteristics of sand movement around 

 groins are discussed. 



Key Words - Erosion/Scour/Accretion/Impermeable/Permeable/Low/ 



Ad jus tab le/Misc-plan/Syst em/Experimental/Model/Single/ 

 Theory/ 



"Summary Statement Concerning Importance 5810GR0002 



of a Groin Design Criterion" 

 Wicker, C. F., Seminar on Groins at 

 Princeton, N. J., ASCE Sponsored, Oct., 

 1958, 2 pp.. Unpublished. 



At the updrift lip of an inlet or at the updrift side of a sub- 

 marine canyon, it is desirable to trap and conserve all of the supply 

 of sand. To do this, a groin must be long, high, and impermeable. 

 Writer believes that these are the only situations where such a 

 structure is desirable. 



Key Words - Impermeable/Structural-design/Erosion/Accretion/High/ 

 Long/ Low/ 



"Motion of Sand Particles Between Groins" 5812GR0001 



Nagai, S., and Kubo, H. , Journal of Water- 

 ways and Harbors Division , ASCE, Vol. 84, 

 No. WW5, Paper 1876, Dec, 1958, 28 pp. 



Experiments on the motion of sand particles between groins were 

 performed in a fixed basin to compare with the results of groins in 

 a movable bed. The comparison proved that both results were in com- 

 paratively good agreement. Experimental results were found for 

 beaches without groins, with single groins, with a groin system, 

 with various groin spacing, and different angle of wave incidence. 



Key Words - Experimental/Single/System/Theory/Misc-plan/Model/ 

 Impermeable/ 



"Protecting Our Shore Line" 5812GR0002 



Brater, E. F., Consulting Engineer , Vol. 

 11, No. 6, Dec, 1958, pp. 92-96. 



Among various shore protection methods, author briefly discusses 



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