44°30' 



44''oo 





o ^^ 



44 00 



70° 



30' 



69° 



30' 



Figure 4-8. Coastal salinity (ppt) contours off the Penobscot, Kennebec, 

 and Sheepscot Rivers during May 1965. Stippled areas have 

 salinities <30 ppt (Graham 1970b) . 



4-21 



10-80 



