observations were also obtained and refraction analysis 

 made. Sand level changes between surveys are plotted 

 and sand movement over the shelf analyzed. 



NO. 27 - June 1952 



II-A "Wind Set-up and Waves in Shallow Water" by Thorndike Savilie, Jr. 



C 



Results of ain analysis of certain wind, wave, and water 

 level data obtained in Lake Okeechobee, Florida, during 

 the passage of two hurricanes, one in August 1949 and the 

 other in October 1950, are presented. Observed wind 

 set-up and wave heights are related to wind velocity, 

 fetch, water depth, and surface shape of the lake. Co- 

 efficient evaluated in the expression for wind set-up 

 is in close agreement with those previously developed by 

 others from model experiments and data taken in the 

 Zuiderzee. 



NO. 28 - October 1952 



II -B "Source of Beach Sand at Santa Barbara, California as Indi- 

 C cated by Mineral Grain Studies" by Parker D. Trask 



Mineralogical study of sand grains in Santa Barbara Harbor 

 and along the coast west and north of the harbor for a 

 distance of more than 250 miles were made. A series of 300 

 samples of beach, river, and offshore sands were collected 

 amd analyzed. It is shown that a significant proportion of 

 the sand at Santa Barbara comes from a distance of more than 

 100 miles upcoast, and that this sand moves around Point 

 Conception. The distribution of minerals along the shore is 

 described and the mechanism of transport around promontories 

 and the Santa Barbara breakwater is discussed. 



NO. 29 - December 1952 



II-E "Artificially Nourished and Constructed Beaches" by Jay V. Hall, Jr, 



Criteria for design of artificially nourished beaches are 

 outlined. Four types of artificial nourishment methods 

 that have been tried in the United States are described; 

 namely offshore dumping, stockpiling, continuous supply, 

 and direct placement methods. Brief histories of five 

 areas where these methods have been employed are presented. 

 A tabular record of a great number of artificially nourished 

 and constructed beaches including factors relating to their 

 placement and economic life is appended. 



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