"Timber in the Construction of Sea Defence 5609GR0002 



and River Works" 



Cotton, K. E., Civil Engineering and Public 



Works Review , London, Sept., 1956, pp. 998- 



1001. (V.F. 3020) 



This article presents the author's practical experience in the 

 use of timber in sea defense and river works, and offers observations 

 concerning merits of timber. 



Key Words - Timber/Europe/Misc-plan/Structural -design/Steel/Permeable/ 

 Impermeable/ 



"Impermeable and Permeable Groins" 5700GR0001 



Bruun, P., 1957, Coastal Engineering 

 Laboratory, Univ. of Florida, Un- 

 published Commentary, 3 pp. (TC535 .B4) 



Author comments on groin adjustability, ruggedness, and perme- 

 ability. 



Key Words - Permeable/Adjustable/Impermeable/Misc-plan/ 



"Functions of Groins Fundamental Study 57Q0GR00Q2 



on Beach Sediment Affected by Groins (1)" 



Shimano, T. , Hom-ma, M. ,' Horikawa, K. , 



Sakou, T. , Proceedings of the Fourth 



Conference on Coastal Engineering in 



Japan , JSCE, 1957, pp. 111-121. 



CTC20d .C748) 



This study examines the mechanism of beach deformation and pro- 

 vides criteria for the design of a groin. Functions of a groin are 

 related to such factors as the characteristics of waves in the surf 

 zone, sediment motion by waves and littoral currents, and eventual 

 deformation of beach and nearshore topographies. 



In building groins, the angle to the shoreline should be directed 

 updrift, and the lengths should be adjusted so the tips will form a 

 natural curve merging with the downcoast shoreline. 



Key Words - Scour/Model/Long/Experimental/lmpermeable/Erosion/ 

 Accretion/ 



72 



