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Filters: Tags: {"type":"NYWSC Water Quality"} (X) > partyWithName: John H Williams (X)

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Background For effective wellhead protection, the area where water carrying potential contaminants can enter the groundwater system and flow to the supply well must first be defined, and then best management practices need to be implemented to minimize the opportunity for contamination to occur in areas defined as sources of water to the well. Determination of the sources of water and contributing areas to wells is complex because aquifers and their connection with recharge sources are heterogeneous in nature and hidden from direct observation. The major groundwater source for public supplies in upstate New York are valley-fill aquifers of glacial and post-glacial origin. Saturated coarse-grained sediments (sand...
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Hydrogeologic characterization of the basal sand and gravel aquifer in the Hoosic River valley in Hoosick Falls, New York is important for determination of sources, extent, and future migration of PFOA groundwater contamination; evaluation of potential remedial actions; and appraisal of alternative groundwater supplies. Variations in the current pumping stresses and a planned 72-hour aquifer test provide an opportunity to characterize hydraulic connections in the basal sand and gravel aquifer through continuous monitoring of groundwater levels in selected wells. Publications Williams, J.H., and Heisig, P.M., 2018, Groundwater-level analysis of selected wells in the Hoosic River Valley near Hoosick Falls, New...
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Geophysics Geophysics GEOPHYSICAL METHODS CAPABILITIES The New York Water Science Center (NY WSC) makes extensive use of geophysical methods in its hydrologic investigations and research in cooperation with local, State, and Federal partners. The NY WSC staff has many years of experience in collecting and interpreting surface and borehole geophysical data, and applying the results to provide a better understanding of the subsurface environment for resource management and protection, infrastructure design, hazard mitigation, and remedial actions. The NYSWSC partners with the Hydrologic Remote Sensing Branch (HRSB) to apply the latest geophysical technologies in support of groundwater studies in New York and...
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The United States Geological Survey (USGS), in cooperation with the New York State Department of Environmental Conservation (NYSDEC), monitors a network of observation wells throughout New York to provide current information on the effect of climatic conditions on groundwater levels. At present (2015), there are 95 observation wells in unconsolidated and bedrock aquifers, all of which are equipped with telemetry for near real time data transmission. Daily groundwater levels and hydrographs for each well site are available online in the National Water Information System (NWIS). In addition, monthly assessments of ground-water conditions, based on frequency statistical analysis of the monitoring data, are provided...
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Problem - The U.S. Geological Survey (USGS) provided technical assistance between 2001 and 2013 to the U.S. Environmental Protection Agency (EPA) in an investigation of the presence of chlorinated solvents (trichloroethylene and degradates) in ground water in the Middle-to-Lower Devonian and Upper Silurian carbonate bedrock southwest of Auburn in Cayuga County, N.Y. Pieziometric and water-quality data from the wells indicate that contaminants may have migrated in the bedrock as far as 7 miles toward discharge areas that are in an adjacent surface-water basin. The ground-water contamination site was added to the Super Fund priority list in 2003. Objectives - The objective of the work is to characterize the stratigraphy,...
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Background and Problem The Retsof salt mine in the Genesee River valley, Livingston County, New York flooded after roof collapses in 1994 created two rubble chimneys in overlying bedrock that intersected a confined aquifer in the basal glacial-drift deposits (figs. 1 and 2). Groundwater flowed downward through the rubble chimneys causing widespread drawdown in the lower confined aquifer until the mine was completely flooded in 1996 (Yager and others, 2001). By 2005, water levels in the lower confined aquifer had nearly recovered to pre-collapse conditions but the hydraulic connection through the rubble chimneys between the brine-filled mine cavity, saline-water bedrock fracture zones, and the lower confined aquifer...
    map background search result map search result map Detailed Aquifer Mapping Program in Upstate New York The Federal-State Groundwater Monitoring Network in New York Hydrogeology of a Ground-Water Contamination Site, Cayuga County, New York Surface-Geophysical Surveys and Well Network for Monitoring Aquifer Salinity in the Genesee River Valley, Livingston County, New York Groundwater-level Monitoring for Characterization of Hydraulic Connections in the Basal Sand & Gravel Aquifer, Hoosic River Valley, Hoosick Falls, New York Simulation of Contributing Areas to Selected Public Water-Supply Wellfields in the Valley-Fill Aquifers of New York State Groundwater-level Monitoring for Characterization of Hydraulic Connections in the Basal Sand & Gravel Aquifer, Hoosic River Valley, Hoosick Falls, New York Hydrogeology of a Ground-Water Contamination Site, Cayuga County, New York Surface-Geophysical Surveys and Well Network for Monitoring Aquifer Salinity in the Genesee River Valley, Livingston County, New York Simulation of Contributing Areas to Selected Public Water-Supply Wellfields in the Valley-Fill Aquifers of New York State Detailed Aquifer Mapping Program in Upstate New York The Federal-State Groundwater Monitoring Network in New York