FOREWORD 



The equations and formulas developed through a purely theoretical 

 approach to oceanography sometimes are difficult to apply directly 

 to a specific naval operation or problem. At times slight modifications 

 in the theoretical approach make these formulas more usable for 

 practical problems; at other times a totally new or different approach 

 is required. In the flushing problem, a combination of theoretical 

 considerations has provided better methods of calculation for the 

 "general" estuary. This report describes such a method currently 

 being used for determining the flushing characteristics of estuaries. 



H. G. MUNSON 

 Captain, U. S. Navy 

 Hydrographer 







