TECHNICAL MEMORANDA C«= THE BEACH ER0SIC»1 BOARD 



NO. 1 - May 1940 



IrE "A Model Study of the Effect of Submerged Breakwaters on 

 Wave Act ion" by 1st Lt . William C. Hall, CE 



A general model study to determine the effect, under 

 varied conditions, of underwater sills upon wave 

 heights and the power of the waves. General conclu- 

 sions are drawn regarding shape and effectiveness of 

 such structures. 



NO. 2 - February 1942 



I^ "Abrasion of Beach Sand" by Dr. Martin A. Mason 

 C 



A study to examine into the rate of loss by abrasion 

 with a view to ascertaining its importance in beach 

 erosion processes. Work by others as well as experi- 

 ments at the Beach Erosion Board Laboratory submitting 

 anthracite coal to wave action in a laboratory wave 

 tank are discussed. Conclusions state that loss of 

 beach material ascribable to abrasion is of very minor 

 importance compared to losses and gains of material 

 ascribable to littoral movement. 



NO. 3 - May 1944 



II-B "Shore Processes and Beach Characteristics" by W. C. Krumbein 

 C 



Natural variables required for study to specify phy- 

 sical laws controlling environmental behavior are 

 discussed. The problem for study was formulated as 

 follows: given a bay with associated headlands, beach, 

 and cliffs, to evaluate the physical processes which 

 occur there. Relations between wave energy, beach 

 slopes, sand size, erosion and deposition were studied 

 and are discussed for the compartmented coastal region 

 of Halfmoon Bay, C^-lifornia. 



NO. 4 - May 1944 



II-C "Surface Features of Coral Reefs" by Dr. Lincoln Dryden 

 F 



Data obtained by investigators who have measured and 



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