Regional study of the Castle Hayne
aquifer of eastern North Carolina
Open-File
Report 87-571
By W.L. Lyke and R.W. Coble
Abstract
The Castle Hayne aquifer is an eastward sloping and thickening
wedge of limestone and sandstone, located in a 12,500 sq mi area
in the eastern part of North Carolina. The Castle Hayne aquifer
is the major source of freshwater for much of coastal North
Carolina where the aquifers underlying the Castle Hayne contain
saltwater. A regional study of the Castle Hayne aquifer was
conducted to provide definitive information on the declines in
water levels and of saltwater intrusion in the area. A series of
geohydrologic maps produced from the study, show the altitude of
the top of the aquifer, location of saltwater in the aquifer,
aquifer thickness, aquifer transmissivity, and confining-unit
thickness. The history of groundwater pumpage can be compared
with historical water levels in the aquifer. These geohydrologic,
pumpage, and water level data can be used to develop estimates
of aquifer and confining-unit hydraulic coefficients and to
develop a groundwater flow model for the Castle Hayne aquifer.
The model will increase the understanding of the groundwater
flow system and also can be used to assess various groundwater
development scenarios for the entire Castle Hayne aquifer.
Citation:
Lyke, W.L., and Coble, R.W., 1987, Regional study of the Castle Hayne aquifer of eastern North Carolina: U.S. Geological Survey Open-File Report 87-571, 1 p.
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