100% REMAINING 

 AT LOW TID£ 



slowly/Vflushed 



FLUSHED/ 



100% by' 

 fresh water 



BY RIVER 



-RAPIDLY FLUSHED 



BY TIDE 



Figure 5-32. Factors controlling flushing in seven Maine estuaries, based on 

 application of the model described on page 5-59. For example, 

 in the Kennebec estuary 40% of the estuary's volume is provided 

 by river flow, about 28% by tidal input, and 32% is residual at 

 low tide. 



5-61 



10-80 



