524 



The object of this division and classification is to separate the 

 coastal area into units within which information may be organized 

 independently. The choice of boundaries for each system was based 

 on consideration of its wat«r pollution control and resource manage- 

 ment aspects and does not necessarily reflect a scientific or engineering 

 classification of estuarine systems. 



Each coastal system tributary to, or composed partially of, an ocean 

 or sea is designated a primary system. Estuaries tributary to a primary 

 system are secondary systems ; those tributary to secondary systems are 



