IV-426 



Cape Fear River in North Carolina. Thousands of fish, including 

 many anadromous species, were killed (IV-5-10). 



Studies of the pollutional effect of storm runoff in Boston Harbor 

 have shown significant increases in deoxygenating substances, as 

 well as bacterial indicator organisms. Control of storm runoff is 

 extremely costly, but it is a very real part of pollution control. 



Runoff from phosphate mining areas in North Carolina and Florida 

 has added large quantities of nutrients to estuarine systems. The 

 phosphate material combined with sewage and other nutrient sources 

 forms a unique, enriched aquatic environment with a real nuisance 

 potential. 



STREAM FLOW REGULATION 



Stream flow regulation structures have been built on many of the 

 rivers directly tributary to estuarine systems. For the most part 

 these structures have had a beneficial influence on estuarine 

 water quality. The regulated stream flow provides a more uniform 

 source of fresh water with fairly constant quality which allows 

 the estuarine system to reach a dynamic equilibrium. In addition, 

 the reservoirs act as settling basins, reducing the sediment load 

 in the estuaries. In a few cases the flow regulation has so 

 restricted the fresh water inflow that the estuarine salinity 

 structure has changed. 



