IV-73 



Decaying plant and animal materials also dissolve into the 

 flowing streams. These materials use oxygen 1n the decaying 

 process and in some streams, particularly 1n swampy areas, very 

 low dissolved oxygen concentrations are normal. Dissolved organic 

 material frequently has a very Intense yellow-black color which 

 may make a water body appear jet black. This condition is common 

 1n the estuarine zones of the South Atlantic and Gulf regions. 



Variable as estuarine water quality and water circulation are, 

 estuarine waters 1n each of the estuarine regions have typical 

 characteristics for different morphological categories. Table 

 IV. 1.9 outlines such typical natural estuarine zone conditions. 



