anchorage for the connnercial fishing fleet and additional facilities for 

 pleasure craft. Development of the inner harbor area by construction of 

 several moles to provide additional shelter for small-craft berthing 

 facilities and land areas suitable for resort motels, restaurants, and 

 related commercial activities. 



(b) Reference . Chatham (1968). 



(c) Laboratory . WES. 



(d) Test Period . May 1966 to November 1967. 



(e) Problem . Monterey Harbor is located at the southern 

 end of Monterey Bay about 100 miles south of San Francisco, and is ex- 

 posed to short -period, distant storm waves from the deepwater direc- 

 tions clockwise between west and northwest and local storm waves from 

 the north direction (Fig. 4-25). Occasionally, these waves are of suf- 

 ficient magnitude to damage fishing boats and harbor facilities and to 

 cause mooring difficulties for small craft in exposed areas of the har- 

 bor. Intermediate- and long-period waves of considerable magnitude also 

 occur in Monterey Bay, and such waves are capable, under certain circum- 

 stances, of a substantial increase in amplitude in some harbor areas due 

 to resonance phenomena. Thus the proposed breakwaters and inner harbor 

 structures should be designed to provide the maximum protection from 

 short-period waves at minimum cost; further, the proposed construction 

 should not amplify the intermediate- and long-period surge waves that 

 occur in the harbor. Since the accurate prediction of the behavior of 

 waves in a harbor is not possible by analytical methods, the need for 



a hydraulic raodel investigation was indicated. A field study was neces- 

 sary to determine the wave conditions that occur in the harbor area 

 (Marine Advisers, 1964); an analytical study was also conducted to de- 

 termine the feasibility of a model study to resolve the intermediate- 

 and long-period surge problems. The model study was determined feasible 

 (Wilson, Hendrickson, and Kilmer, 1965). 



(f) Purpose of Model Study . The model study was conducted 

 to determine whether the proposed harbor revisions would provide adequate 

 protection from intermediate-, long-, and short-period wave and surge 

 action. It was desired that the intermediate- and long-period waves that 

 occur in the harbor area not be amplified by resonance to such an extent 

 that the resulting wave heights and currents in the navigation openings 

 and inner harbor basins would constitute a hazard to small craft. Another 

 objective of the model investigation was to determine whether suitable de- 

 sign modifications of the proposed plans could be made that would reduce 

 construction costs significantly and still provide adequate protection 

 from wave action. Presently (1976), no established criteria are avail- 

 able from which satisfactory conditions in a small-craft harbor can be 

 assured for waves with periods greater than about 25 seconds. However, 

 observations in the small-craft harbor at Santa Cruz, California (Magoon 

 and Sarlin, 1970), indicate that waves with periods of 80 seconds to 10 

 minutes with heights of about 1.0 to over 4.0 feet occur frequently in 



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