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Publications

Publications from USGS science centers throughout the Southeast Region.

Filter Total Items: 10378

Evaluation of site-selection criteria, well design, monitoring techniques, and cost analysis for a ground-water supply in Piedmont crystalline rocks, North Carolina Evaluation of site-selection criteria, well design, monitoring techniques, and cost analysis for a ground-water supply in Piedmont crystalline rocks, North Carolina

A statistical analysis of data from wells drilled into the crystalline rocks of the Piedmont and Blue Ridge provinces of North Carolina verified and refined previously proposed criteria for the siting of wells to obtain greater than average yields. An opportunity to test the criteria was provided by the expansion of the town of Cary's municipal ground-water system. Three criteria were...
Authors
Charles C. Daniel

Plant community structure in an oligohaline tidal marsh Plant community structure in an oligohaline tidal marsh

An oligohaline tidal marsh on the northern shore of Lake Pontchartrain, LA was characterized with respect to the distributions and abundances of plant species over spatial and temporal gradients using Detrended Correspondence Analysis (DCA). In addition, the species distributions were correlated to several physical environmental factors using Detrended Canonical Correspondence Analysis...
Authors
J.S. Brewer, J.B. Grace

Toxicity of inorganic and organic selenium to Daphnia magna (cladocera) and Chironomus riparius (diptera) Toxicity of inorganic and organic selenium to Daphnia magna (cladocera) and Chironomus riparius (diptera)

Elevated concentrations of selenium (Se) have been previously measured in biota sampled from the Kesterson National Wildlife Refuge (KNWR) in the San Joaquin Valley of central California. We conducted acute and chronic toxicity tests with the cladoceran Daphnia magna and the midge Chironomus riparius to determine the toxicity or bioaccumulation of waterborne Se in a reconstituted water...
Authors
Christopher G. Ingersoll, F.J. Dwyer, T.W. May

Continuous seismic reflection profiling of hydrogeologic features beneath New River, Camp Lejeune, North Carolina Continuous seismic reflection profiling of hydrogeologic features beneath New River, Camp Lejeune, North Carolina

A medium-power, wide-frequency seismic system was used to collect more than 100 miles of continuous seismic reflection profiling data over a 4- day period along a 24-mile segment of the New River estuary and Intracoastal Waterway. The seismic reflection data were evaluated to determine the continuity of aquifer sediments and correlation with existing borehole geophysical well-log data at...
Authors
A.P. Cardinell, D.A. Harned, S. A. Berg

Simulation of ground-water flow in aquifers in Cretaceous rocks in the central Coastal Plain, North Carolina Simulation of ground-water flow in aquifers in Cretaceous rocks in the central Coastal Plain, North Carolina

The principal sources of water-supply in Cretaceous rocks in the central Coastal Plain of North Carolina are the Peedee, Black Creek, and upper Cape Fear aquifers. Ground-water withdrawals from these aquifers have increased from about 0.25 million gallons per day in 1910 to over 29 million gallons per day in 1986, causing water-level declines as much as 160 feet. The maximum rate of...
Authors
J. L. Eimers, W.L. Lyke, A. R. Brockman
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