Hydrogeologic setting, ground-water flow, and ground-water quality at the Lake Wheeler Road research station, 2001-03 : North Carolina Piedmont and Mountains Resource Evaluation Program

Abstract

Rose diagrams showing strike orientation of bedrock foliation interpreted from optical televiewer images of (A) well MW-1D; (B) well MW-2D, 81-400 feet; (C) well MW-2D, 400-600 feet; (D) well MW-3D

Predicting nitrate exposure from groundwater wells using machine learning and meteorological conditions

“…Geographic regions were used as a simplistic means of dividing the samples into regions of different geology. The coastal plain of North Carolina is characterized by an aquifer system whose bedrock depth can be greater than 500 m. In contrast, the mountains have an unconsolidated regolith layer sitting on top of bedrock that may be as shallow as 10 m. The Piedmont is a transition zone, with the regolith layer being thicker than in the mountains (Campbell, 2011; Chapman et al., 2005). We expected the transport and transformation of nitrate to vary in each region based on geological properties; therefore, the explanatory variables were expected to differ between each region.…”

Hydrogeology, groundwater seepage, nitrate distribution, and flux at the Raleigh hydrologic research station, Wake County, North Carolina, 2005-2007

“…In the processed inversion, the low resistivity areas to the west and east sides of the profile were located where both of the unnamed tributaries discharge to the Neuse River. As the unnamed tributaries were reported to have base-flow nitrate concentrations ranging from 30 to 60 mg/L as N in 2005(Fountain, 2006, the low resistivity measurements in the area of the unnamed tributaries on the continuous resistivity profile most likely represented groundwater contaminated by high concentrations of nitrate with the potential to discharge into the Neuse River.…”