123 



-12- 



provides a large input of organic carbon (from 37 to 77% 

 of the total). Sewage sludge and dredged materials provide 

 much less of the total input (less than 23% combined) . 



However, the organic carbon resulting from primary production 



2 

 is initially distributed over a larger area (1,250 km ), 



while the organic carbon inputs resulting from barge dumping 



of sewage sludge and dredged materials are initially input 



into a much smaller area. The area of the sewage and mud 



2 

 dumpsites combxned is less than 30 km , or less than 3% of 



the total area of the Apex. Table H shows organic carbon 

 inputs adjusted for the area of initial input. These over- 

 simplified calculations show that barged-in organic carbon 

 inputs are 5.3 to 105 times as concentrated as inputs from 

 primary production. (Estuarine inputs are the other major 

 source of organic carbon input, but area calculations are 

 difficult to do with estuarine inputs, because the appropriate 

 area over which they should be initially distributed is not 

 clear.) This adjustment for the area of initial input is one 

 that should be kept in mind while looking at other data on 

 inputs to the Bight. 



