VI-150 



mathematical models should be made. The advantages and disad- 

 vantages of each type of model for different purpose studies 

 should be fully delineated. 



Finally, to complete the objective of optimally maintaining or 

 enhancing estuarine water quality, management models need to 

 be developed and demonstrated which ifin determine the optimum con- 

 trol strategy drawing upon all of the aforementioned quality 

 control techniques. 



Physical Models 



Physical models can be considered essentially as three types. 

 One type, and perhans most dramatic and most expensive, is one 

 in which the complete water mass and its basin under considera- 

 tion are constructed in a scale keeping with that of the natural 

 configuration and in which the natural forces working on that 

 basin can be applied and varied at will. This sort of model 

 is used effectively by the Corps of Engineers and a great deal 

 of excellent information has been derived from them. Of all of 

 the possible modeling alternatives, this is orobably the most 

 useful and, hence, should be the most widely applied for each 

 of the major estuaries and minor estuaries of special interest 

 in the country. Research is needed to obtain similarly reliable 

 information without going through the expense and time required 

 to construct these. 



