areas along Lake Michigan near Waukegan, Illinois, and 

 at Ocean Beach, Maryland, are compared to indicate 

 seme of the factors involved in beach sampling for 

 different purposes. 



NO. 91 - November 1956 



II -B "Changes in Configuration of Point Reyes Beach, California 

 C 1955-1956" by Parker D. Trask 



This is a continuation of the study reported in Technical 

 Memorandum No. 65. Surveys were made at 8 intervals 

 between August 1955 and June 1956, and variations in 

 sediment characteristics were investigated and correlated 

 with changes in cusp formations and cut and fill on the 

 beach. 



NO. 92 - March 1957 



II-C "Sand Bypassing at Port Hueneme, California" by Rudolph P. 

 E Savage 



Discussion of a novel method of bypassing saind from an 

 accreted area updrift of a jetty to an eroding downdrift 

 shore is presented. The method involved first the 

 dredging of a large lagoon in back of the beach, leaving 

 a barrier to serve as protection for the dredge, and then 

 dredging cuts through the barrier. Results of the 

 operation as indicated by periodic surveys after its 

 completion are presented, and in general indicate the 

 method to be successful. However, modifications are 

 suggested should any similar operations be planned for 

 the future. 



NO. 93 - February 1957 



II -F "Modification of the Quadratic Bottom - Stress Law for 



Turbulent Channel Flow in the Presence of Surface Wind- 

 Stress" by R. 0. Reid 



In this paper a generalized formula for velocity profile 

 and bottom stress is derived which takes the influence 

 of surface stress into account. In general, the effect 

 of the wind stress is such that, for a given current, 

 the effective resistance to the flow is reduced for a 

 following wind and increased for an opposing wind, 

 relative to the resistance which exists in the absence 

 of the surface stress. The steady state case with zero 



108 



