426 



BOUNDARIES OF THE SEA 



fresh water away from the source region at a rate equal to its 

 supply. 



The outward movement creates a velocity shear relative to the 

 lower zone. This may be augmented by other shear stresses due to 



CROSS SECTION 



Lond Droinage 



SALINITY (Voo) 

 30 32 -■ 34 30 32 -* 3 ' 



UPPER ZONE \^f^'/^\ 



ID- 



Fig. 1. Features cf an estuarine embayment. 



