3-50 



ively. This area was slightly stratified with respect to salinity and 

 temperature except in midsummer, when rxinoff was minimal. Transparency 

 and dissolved oxygen concentrations were higher than in the balance of 

 the inner harbor; pH, salinity, and temperature fluctuations were less 

 because of the greater depth and proximity to the outer harbor. 



Inner-Outev Harbor Boundary 



The division between inner and outer harbors occurs at the 

 natural constriction formed by Sandy Point on the West and by Fort Hale 

 Park on the East. Our sampling indicated that this boundary was typi- 

 fied by characteristics intermediate to those of the inner and outer 

 harbors. This boundary zone was sampled at Station 11 in the main 

 shipping channel in 12 m of water (MLW) . Except in cases of extremely 

 high runoff, there was little difference between the inner harbor ship- 

 ping channel area and this boundary location; when runoff was extreme, 

 horizontal and vertical salinity gradients were observed that were 

 unique to this boundary area, i.e., they differed from both the inner 

 and outer harbors proper. 



Morris Cove 



Morris Cove is shallow (3-4 m, MLW) and has strong ebb-tidal 

 currents (Duxbury, 1963) that carry inner harbor waters into the outer 

 harbor and Long Island Sound. The cove is typically well mixed and 

 similar to Long Island Sound, except on ebb tides during periods of 

 siibstantial runoff, when near-surface dilution is extensive. Morris 

 Cove faces a long southwest fetch; when southwest winds persisted for a 

 few days, supersaturation {>150%) of dissolved oxygen was observed in 

 near-surface waters. Biological productivity might contribute to this 

 phenomenon . 



