demonstrated that DYNLETl can accurately represent the dynamics of water 

 movement in a shallow bay. This report also contains a short review of other 

 work on tidal inlets that involved simple models. 



187. The ease of use, accuracy, and efficiency of DYNLETl satisfies the 

 objective of this study in providing a reconnaissance -level model for use by 

 planners and engineers. The main resource required is a modern desk- top 

 computer, and preparations to perform quantitative tidal flow studies with the 

 model can be completed in a matter of 1 or 2 weeks, with actual model run 

 duration tjrpically on the order of minutes. 



188. The major theoretical limitation of the one -dimensional tidal flow 

 model DYNLETl is restriction of flow along the inlet or channel axes. This 

 condition is expected to be satisfied at most inlet throats, and, in fact, the 

 model provided accurate results in two tidal flow field case studies with 

 converging flows and multiple channels, including a situation with two side 

 bay areas. Thus this rigorous one -dimensional model appears to be robust 

 beyond the apparent theoretical limitation. The actual range of validity of 

 the model has yet to be explored empirically and should be the subject of 

 further study. 



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