PROGRESS REPORTS ON RESEARCH SPONSORED BY 

 THE REACH EROSION BOARD 



Abstracts from progress reports on several research contracts in 

 force between universities or other institutions and the Beach Erosion 

 Board, together with birief statements as to the status of research 

 projects being prosecuted in the laboratory of the Beach Erosion Board 

 are presented as follows; 



I, University of California, Contract No. DA-lt9-0$^-eng-8, Stattts 

 Report No. Ih, 1 March 195U through 1 May 195h 



Ifechanical analysis of the sand samples collected dtiring the 

 survey of the movement of sand around the rocky promontories of Point 

 Arguello, Point Conception and Point Dume in Southern California is 

 now con^leted. The results are being coupiled on charts to aid in 

 interpretation of the mechanics of sand movement around these points. 



The series of sand saJiples collected during Febiniary on Point 

 Reyes Beach to determine the variability of individual sanples taken 

 on a beach, irregular in conposition and exposed to storm action, are 

 in the process of mechanical analysis. 



In the latter part of April a series of sand sanples were collected 

 in Santa Barbara harbor and along the adjacent beach to the east to 

 sipplement previous studies of sand movement in these areas.. Special 

 emphasis was given to depths shallower than 20 feet. 



II. University of California, Contract No. DA-1^9-0^g-eng-31, Status 

 Report No. 3-1 February to 30 April 195h 



The runs with a smooth bed in the channel were conpleted. The 

 measurements included the set-up at 5 locations and wave conditions 

 at h locations along the channel for five different wind velocities 

 with seven different still -water depths. An interim report is being 

 prepared for the smooth bottom conditions. 



Runs on set-tip have been made with a bed roughened by means of 

 expanded metal lath. Preliminary analysis indicates that this degree 

 of roughness gives a set-up about 10 percent greater than with the 

 smooth bottom. Exploratory experiments were made with strips of 

 cheese cloth in the channel to simulate the roughness effects of 

 vegetation in nature. 



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