"Characteristics of Shingle Beaches: the 7009GR0006 



Solution to some Practical Problems" 

 Woodj A. M. M, , Proceedings of the Twelfth 

 Coastal Engineering Conference , ASCE, Vol. 2, 

 Sept., 1970, pp. 1059-1075. (TC203 .C6) 



Shingle beaches differ from sand beaches mainly in the mode 

 of transport of the material and in the permeability of the beach. 

 The typical beach forms are in consequence different and the typical 

 problems of beach stabilization require different solutions. 



The mechanism of littoral transport of shingle is controlled 



predominantly by the action of the breaking wave; on a groined beach 



a simple theory is advanced to relate transport to groin length and 

 spacing. 



Key Words - System/High/Theory/Field/Misc-plan/Long/Piling/ 

 Steel/Concrete/ Timber/Europe/ 



"Variation of Topography of Sea-Bed Caused 7009GR0007 



by the Construction of Breakwaters" 



Sato, S. , and Irie, I., Proceedings of the 



Twelfth Coastal Engineering Conference , ASCE , 



Sept., 1970, pp. 1301-1319. (TC203 .C6) 



Changes of the topography of sea-bed caused by the construction 

 of jetties and breakwaters are discussed on the basis of charts of 

 several Japanese ports and the results of model tests. 



Key Words - Asia/ Field/Model/Experimental/ 



"The Dynamics of a Coast with a Groyne 7009GR0008 



System" 



Bakker, W. T. , Breteler, E. H. J. K. , Roos, A., 



Proceedings of the Twelfth Coastal Engineering 



Conference , ASCE, Vol. 2, Sept., 1970, 



pp. 1001-1020. (TC203 .C6) 



Mathematical coastal model is schematized by a beach line and 

 an inshore line (two- line theory). TVo aspects of the effects of a 

 groin system are covered: (1) Prevention of littoral transport in area 

 between shoreline and groin head, and (2) formation of a sheltered 

 area at lee-side of groin, caused by diffraction. 



Key Words - Theory/System/Model/Accretion/Erosion/Impermeable/ 



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