"Siirf Conditions and Beach Profiles Records for Santa tiargarita 

 River Beach, Oceanside, California for 19h9-" by R.L. Wiegel, Lt. D, A, Patrick, 

 CEC, USN, and Lt, H, L. Kimbsrley, USN. 



Diaring a study of anphibious oceanography by the University of 

 California for, and in conjunction vjith, the U, S, Ifeirine Corps the 

 opportunity developed for measuring wave and besch conditions at the mouth 

 of the S-'XLta Margarita Pliver (just north of Oceanside, California) for a 

 period of nearly one yearo For this period continuous records of significant 

 and maximum wave heights with wave period are presented together with beach 

 and bottom profiles sounded at one to three-week intervalso No atteiipt has 

 been made to correlate the wave data with beach changes; hoiijever, the data 

 are of interest, especially as there are two jetties imrfiediately south of 

 the beacho 



"Gorrparisons of Beach Elevation at Limits of Backrush and Uprush t-jith 

 use and GS Tide Predictions on Several Pacific Ocean Beaches" by D. Ao 

 Patrick, Lt,, CEC, USN, 



In conjunction x-jith other field studies in anphibious oceanography 

 data were obtained concerning the elevations of and distances between the 

 limits of uprtish and backrush of waves breaking on the beach, TMs report 

 presents the results of atteripts to correlate these two limits X\rith U3C 

 and GS tide predictions on several Pacific Ocean beaches. The author 

 concludes that no simple enpirical relationships exist between elevations 

 of limits of backrush and uprush and the U3C and GS tide predictions, but 

 the limit of backrush is a more reliable index to tide prediction than the 

 limit of uprush. He also concludes that the variabilities of the elevations 

 of limits of backrush and uprush are at best a very obscure function of 

 the tide stage and of the beach slope. 



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