East 



Haddam 



Bridge 



Essex ISaybrook 

 IShoal Bridge 



o/o, o;,' ■ /^^rXTf^^m^ ^i ''^' ''''- 



57 m'/sec (2000cfs) 



.y j/r^yj^^ 



0,01 q.i ■ ^v -fl-^eV/^^o^^,^ 



29 Sep 1935 



168 mVsec (5920 cfs) 



'001 OI'J 



18 Aug 1935 



218 mVsec (7710 cfs) 



25 July 1935 



264 mVsec (9320 cfs) 



12 Jun 1935 



504 m'/sec (17,800 cfs) 



0.01 



13 Apr 1937 

 01 907 mVsec (32 ,500 cfs) 



Figure 19. Chlorinity at high slack water in the lower part of the Connecti- 

 cut River during different river-discharge conditions. Chloride concentra- 

 tion in parts per thousand. Indicated discharge is for previous day at 

 Thompsonvi 1 le, Connecticut. After Meade (1966, Fig. 3). 



Major estuaries and adjacent parts of the Sound receive a large 

 proportion of the pollutants entering the region and are therefore areas of 

 critical concern. The movement of water in estuaries is complex in that it 

 is controlled to various degrees by tidal motion and fresh-water inflow. 

 Flow information sufficient to permit predictions of the amount of pollutants 

 and the rate of transport through an estuarine reach and into the Sound is 

 generally not available. At present, continuous stage information in tide 

 affected rivers is restricted to the 25-mile long reach of the Connecticut 

 River between Hartford and Middle Haddam. This data collected by the U.S. 

 Geological Survey can produce flow information such as stage, upstream and 

 downstream discharge, water-surface profile and flushing time at any location 

 in a reach and for any period of time. Limited flow data is available for a 

 45-mile reach between Wilson and Essex while flow is continuously computed for 

 a 4-mile reach between Middletown and Middle Haddam. 



43 



