a. 

 a. 



S> 



c 



X 

 Ql- 



30 



20 



0,4 



HO 0.2 



Ouj 

 z> 



X 



River discharge = 76. 3 m^/second 



Head ot estuary = 2.0 km below dam at Calais 



Subtidal range = 0-1 Om ~ 



\ 



10 



20 



30 



40 



50 



DISTANCE FROM HEAD (KM) 



Figure 5-24. Salinity (ppc), flushing time (number of tides), mean tidal 



ve'locity (km/hr) , and non-tidal velocity (km/hr) as predicted 

 by the Ketchum estuarine flushing model for the St. Croix 

 estuary. Data are plotted from the head of the estuary 

 (0 km) downstream to the point of predicted oceanic salinity. 



5-37 



10-80 



