Simulation of ground-water flow in the unconfined aquifer system of the Toms River, Metedeconk River, and Kettle Creek basins, New Jersey

Nicholson, Robert S.; Watt, Martha K.

doi:10.3133/wri974066

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies of groundwater flow in areas that include JBMDL, Pine Lake, or Little Pine Lake generally assume a gaining condition, without integrating the hydrolithologic heterogeneity of the Kirkwood-Cohansey aquifer system (Modica, 1996;Nicholson and Watt, 1997;AECOM, 2010;Cauller and others, 2016) or vertical hydraulic gradients (Watt and others, 1994;Watt and others, 2002;AECOM, 2010) as part of the assessment. Therefore, prior knowledge of groundwater conditions and groundwater/surface water interaction associated with these specific lakes is limited.…”

Section: Surface Watermentioning

confidence: 99%

Hydrogeology and gain/loss assessment of two lakes contaminated with per- and polyfluoroalkyl substances, vicinity of Joint Base McGuire-Dix-Lakehurst, New Jersey, 2020–21

Fiore¹,

Witzigman²,

Reiser³

2021

Scientific Investigations Report

View full text Add to dashboard Cite

Per-and polyfluoroalkyl substances (PFAS) have been identified in two lakes near Joint Base McGuire-Dix-Lakehurst (JBMDL) in New Jersey-Little Pine Lake in Pemberton Township and Pine Lake in Manchester Township. The streams that enter these lakes begin in or near JBMDL where sources of PFAS contamination are located. The U.S. Geological Survey, in cooperation with the U.S. Air Force Civil Engineer Center, performed a study of the hydrogeology and the gaining or losing conditions associated with these lakes.Hydrogeologic characteristics in the vicinity of both lakes were assessed using qualitative vertical hydraulic profiling of the subsurface. Groundwater was pumped from test intervals at various depths below land surface, then groundwater levels were measured until they recovered to static conditions. Low permeability aquifer intervals were identified within the aquifer underlying both lakes, consistent with silty and (or) clayey subunits of the Kirkwood-Cohansey aquifer system indicated on geophysical and lithologic logs.Gaining or losing conditions between groundwater and lake surface water were assessed with continuous monitoring of water levels and temperature in the lakes and in three piezometers per lake screened at different depths in the underlying aquifer from August 2020 through May 2021. At Little Pine Lake, surface water levels were consistently lower than groundwater levels, which is indicative of a gaining condition with groundwater flowing into the lake. Gaining conditions also support the lack of diurnal temperature fluctuations observed in groundwater, but poor response of surface-water temperature prevents complete analysis. The potential for losing conditions at other locations around Little Pine Lake necessitates further assessment in regard to possible PFAS contamination of groundwater in the underlying aquifer. Temperature results were inconclusive at Pine Lake, but surface water levels were consistently higher than groundwater levels throughout the monitoring period, which indicates a losing condition with lake water flowing into the underlying aquifer. Because of the downward vertical hydraulic gradient identified at Pine Lake, there is a strong possibility that PFAS in the lake water has also contaminated groundwater in its vicinity. GroundwaterFiore (2020) described the regional hydrogeologic structure in the vicinity of JBMDL, which included areas where Little Pine Lake and Pine Lake are located. Both lakes overlie the Kirkwood-Cohansey aquifer system, which consists primarily of sands from the Kirkwood Formation, Cohansey

show abstract

Section: Surface Watermentioning

confidence: 99%