Direc 

 cipal 1y because o 

 the surface mater 

 del i neated drai na 

 from the drainage 

 ground-water disc 

 62 percent of the 

 charge in coastal 

 3 shows the gener 

 the north shore o 



t runoff constitutes a high proportion of streamflow, prin- 

 f the topography and relatively low permeability of much of 

 ials. Ground-water circulation is generally confined within 

 ge basins and the direction of ground-water movement is away 



divides and toward major streams and estuaries. Most 

 harge is to streams and where computed (4) ranges from 28 to 

 total annual runoff. A small amount of ground-water dis- 

 areas is subsurface outflow into Long Island Sound. Figure 

 al pattern of water circulation in a major drainage basin on 

 f the Sound. 



-Drainage Divide 



MAJOR GROUND - WATER FLOW SYSTEM 



WEST 



EXTENT 



OF MINOR FLOW 



SYSTEM 



Drainage Divide - 



EAST 



^^\^r: 



a 



' / i 



</ / CD 



Figure 3. Idealized section illustrating ground-water movement and dis- 

 charge on the north shore of Long Island Sound. After Cervione and others 

 (1968, Fig. 33). 



The direction of ground-water movement is shown by flow lines. Ground- 

 water discharge consists of (1) seepage to streams and (2) ground-water 

 evapotranspi ration. 



Long Island Sound is an approximately 1300 square mile embayment 

 bounded on the south by Long Island and on the north by the New York and Con- 

 necticut shorelines. The eastern third may be thought of as an extension of 

 the continental shelf, whereas the central and western parts are more analo- 

 gous to an estuary. The eastern end of the Sound is generally considered to 



