(b) a tide reproducing system for the bay i£ the bay is not 

 completely modeled, 



(c) wave generator or generators, 



(d) tidal height measuring and recording system, 



(e) velocity measuring and recording system, 



(£) wave measuring and recording system, and 



(g) photographic capabilities. 



Each of these systems requires proper planning in designing the model as 

 construction of the model depends on advanced knowledge of the specific 

 requirements of each system. 



c. Model Construction . The construction of the model requires the 

 proper planning aaid sequencing of: 



(1) Basic site preparation; 



(2) installation of buried features (i.e., pipelines, re- 

 quired bases for instrumentation support systems, etc.); 



(3) installation of control templates; 



(4) installation of base material; 



(5) placement of material (normally concrete) forming the 

 model ; 



(6) finishing the model for the desired surface texture; 



(7) fabrication and installation of tide-generating capa- 

 bilities; and 



(8) installation of wave generators, velocity recording 

 systems, tide recording systems, wave recording systems, and 

 photographic capabilities. 



Among the details that must be planned in model construction are the 

 various inlet changes to be evaluated during the model study. If the 

 effects of dredging a feature are evaluated, the construction of the 

 model should be based on this information. The templates prepared from 

 detailed hydrographic and topographic maps to assure the model is a true 

 representation of the prototype should be modified to include the deepest 

 possible navigation channel, deposition basin, turning basin, etc. This 

 would allow the study of these features in later stages of the model test- 

 ing program. A second set of templates can then be installed in the molded 

 model to allow features of lesser depth to be incorporated into the model. 



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