A5071043821- Groundwater flow and contamination studies
- Groundwater and Isotope Geochemistry
- Water Quality and Resources Studies
- Hydrology and Watershed Management Studies
- Hydraulic Fracturing and Reservoir Analysis
- Soil and Unsaturated Flow
- Reservoir Engineering and Simulation Methods
- Geophysical Methods and Applications
- Grouting, Rheology, and Soil Mechanics
- Archaeology and Natural History
- Geological Modeling and Analysis
- Methane Hydrates and Related Phenomena
- Urban Stormwater Management Solutions
- Climate change and permafrost
- Groundwater and Watershed Analysis
- Rock Mechanics and Modeling
- Drilling and Well Engineering
- Geophysical and Geoelectrical Methods
- Soil erosion and sediment transport
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Underground infrastructure and sustainability
- Mine drainage and remediation techniques
- Flood Risk Assessment and Management
- Hydrology and Sediment Transport Processes
United States Department of the Interior
2018
Entertainment Industries Council
2016
United States Geological Survey
2004-2010
First posted December 16, 2020 For additional information, contact: Director, New England Water Science CenterU.S. Geological Survey10 Bearfoot RoadNorthborough, MA 01532 A three-dimensional groundwater-flow model was developed for the aquifer system of Long Island, York, to evaluate (1) responses hydrologic changes in natural and anthropogenic hydraulic stresses, (2) subsurface distribution groundwater age, (3) regional-scale travel times source water fresh surface waters coastal receiving...
The 2010 Bethpage groundwater-flow model (ARCADIS, 2010) was based on a steady state assumption. Although it is widely acknowledged that significant water-level changes have occurred in the past, reviewed does not represent changing water levels. approach limits effectiveness of following: 1. identification sources contamination, 2. analysis accuracy, 3. calibration, and 4. simulations future scenarios. Future plume movement simulated an incomplete manner through unchanging field. Available...
A three-dimensional groundwater-flow model is coupled with the particle-tracking program MODPATH to delineate zones of contribution wells pumping from Magothy aquifer and supplying water a chlorinated volatile organic compound removal plant at site GM–38, Naval Weapons Industrial Reserve Plant, Bethpage, New York. By use driller’s logs, transitional probability approach generated three alternative realizations heterogeneity within assess uncertainty in representation. Finer-grained sediments...
First posted October 5, 2016 For additional information, contact: Director, New York Water Science Center U.S. Geological Survey 425 Jordan Road Troy, NY 12180 http://ny.water.usgs.gov To assist resource managers and planners in developing informed strategies to address nitrogen loading coastal water bodies of Long Island, York, the State Department Environmental Conservation initiated a program delineate comprehensive dataset groundwater recharge areas (or contributing groundwater), travel...
The coastal-aquifer system of Manhasset Neck, Nassau County, New York, has been stressed by pumping, which led to saltwater intrusion and the abandonment one public-supply well in 1944. Measurements chloride concentrations water levels 2004 from deep, confined aquifers indicate active response pumping. A numerical model capable simulating three-dimensional variable-density ground-water flow solute transport heterogeneous, anisotropic was developed using U.S. Geological Survey finite-element,...
First posted August 16, 2018 For additional information, contact: Director, Virgina Water Science Center U.S. Geological Survey1730 East Parham RoadRichmond, VA 23228 The Survey (USGS), in cooperation with the U.S Fish and Wildlife Service, has investigated hydrology of Great Dismal Swamp (Swamp) National Refuge (Refuge) Virginia North Carolina developed a three-dimensional numerical model to simulate groundwater surface-water hydrology. was MODFLOW-NWT, USGS flow modeling program,...
Horizontal and vertical hydraulic conductivity, transmissivity, storativity of the aquifer system at Centereach, New York, were estimated using analytical multiple-well test models compared with results numerical regional flow modeling hydrogeologic framework studies. During initial operation production well S125632 in May 2008, continuous water-level temperature data collected a cluster five partially penetrating observation wells, located about 100 feet (ft) from S125632, S33380, 10,000 ft...
The Retsof salt mine in upstate New York was flooded from 1994 to 1996 after two roof collapses created rubble chimneys overlying bedrock that intersected a confined aquifer glacial sediments. now contains about 60 billion liters of saturated halite brine is slowly being displaced as the weight sediments causes cavity close, process could last several hundred years. Saline water detected 2002, and brine-mitigation project includes pumping followed by onsite desalination implemented 2006...
First posted July 31, 2018 For additional information, contact: Director, New York Water Science Center U.S. Geological Survey 2045 Route 112, Building 4 Coram, NY 11727 A steady-state three-dimensional groundwater-flow model that simulates present conditions was coupled with the particle-tracking program MODPATH to delineate zones of contribution wells pumping from Magothy aquifer near a chlorinated volatile organic compound (VOC) plume. This modeling part study by in cooperation Naval...
First posted October 1, 2021 For additional information, contact: Director, New York Water Science CenterU.S. Geological Survey425 Jordan RoadTroy, NY 12180–8349 To assist resource managers and planners in developing informed strategies to address nitrogen loading coastal water bodies of Long Island, York, the U.S. Survey State Department Environmental Conservation initiated a program delineate areas contributing groundwater by assembling comprehensive dataset groundwater, travel times,...
First posted November 20, 2020 For additional information, contact: Director, New York Water Science CenterU.S. Geological Survey425 Jordan RoadTroy, NY 12180–8349 A steady-state three-dimensional groundwater-flow model based on present conditions is coupled with the particle-tracking program MODPATH to assess fate and transport of volatile organic-compound plumes within Magothy upper glacial aquifers in southeastern Nassau County, York. Particles are forward tracked from locations defined...
First posted July 16, 2021 For additional information, contact: Director, New York Water Science CenterU.S. Geological Survey425 Jordan RoadTroy, NY 12180–8349 The fresh groundwater system at Fire Island National Seashore in is one of the natural resources that most vulnerable to climate change; various federally listed threatened or endangered species live on Island, including piping plover, roseate tern shorebird, and seabeach amaranth may be affected by changes system. U.S. Survey,...
Two ceiling collapses in the Retsof salt mine near Geneseo upstate New York spring 1994 resulted upward propagation of two columns rubble through 600 feet overlying shale and carbonate bedrock. This formed a hydraulic connection between lower confined aquifer (LCA) allowed water from bedrock fracture zones that intersected to flow into at rate 18,000 gallons per minute (gal/min) . All mining ceased September 1995, was completely flooded by January 1996. The caused widespread drawdowns,...
Particle tracking was applied to a three-dimensional, seven-layer ground-water-flow model of 270-square-mile area in central Long Island delineate the recharge-contributing areas five hypothetical well sites that represent variety hydrologic settings.These are (1) on northern shore, (2) near regional ground-water divide where confining layer is present, (3) no (4) at southern shore Patchogue River unit and (5) tidal wetland present.Ground-water flow each site simulated under nonpumping...
A density-dependent groundwater flow and solute transport model of Manhasset Neck, Long Island, New York, was used to analyze (1) the effects seasonal stress on position freshwater/saltwater transition zone (2) flowpaths. The following were in simulation: 182 transient periods, representing historical record from 1920 2011, 44 future hypothetical conditions 2011 2030. Simulated water-level salinity (chloride concentration) values are compared with a previously developed two-stress-period...
Net area!recharge and aquifer hydraulic conductivity values for calibration of a transient-state ground-water-flow model were estimated through nonlinear regression technique that minimizes the sum squared weighted differences between observed simulated water levels.The estimates these terms obtained levels by U.S. Geological Survey's modular flow (MODFLOW).Model-parameter data are independent water-level observations can be used to force yield parameter close expected values.The study area...