. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. NORTH CAROLINA STATE LIBRARY RALEIGH IM. C. Doc. MAR 3 1 197/ August, 1976 Trading oysters for beans? 1235 Burlington Laboratories NCSU, Raleigh, N.C. 27607 Tel: (919) 737-21*51* the question of fresh water In the old West, the issue was fences. On the North Carolina coast, it's ditches and "fresh water intrusion." Fresh water intrusion is the runoff of fresh water into normally brackish or salty water. The definition is simple but the implications are com- plex. Many of the brackish, estuary wat
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. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. NORTH CAROLINA STATE LIBRARY RALEIGH IM. C. Doc. MAR 3 1 197/ August, 1976 Trading oysters for beans? 1235 Burlington Laboratories NCSU, Raleigh, N.C. 27607 Tel: (919) 737-21*51* the question of fresh water In the old West, the issue was fences. On the North Carolina coast, it's ditches and "fresh water intrusion." Fresh water intrusion is the runoff of fresh water into normally brackish or salty water. The definition is simple but the implications are com- plex. Many of the brackish, estuary waters that receive fresh water such as rain are also the nur- sery grounds for shrimp, oysters, flounder, trout and other commercially important marine life. These creatures can adapt to a wide range of salinities and temperatures, but they all have limits to the amount of fresh water they can stand. And they may be hurt by rapid fluctuations in water's salt content. Other factors are involved, but according to a study on brown shrimp done by the North Carolina Division of Marine Fisheries, salinity is a major ingredient for survival in the estuaries. Runoff has always occurred along the coast. When it rained, the fresh rainwater eventually found its way to the shore. But in recent years, as corporations have cleared vast acreages for "superfarms" and developers have made room for homes, the face of the coastal area has changed. Mazes of drainage ditches now make more avenues for fresh water to rush to the brackish coastal areas. And fewer swamp forests are present to trap the water and slowly filter it to the shore. (See "The Problem, " page two). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. UNC Sea Grant College Program. [Raleigh, N. C. : UNC Sea Grant College Program]