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A Surficial Hydrogeologic Framework for the Mid-Atlantic Coastal Plain These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. The hydrogeologic framework was developed from a combination of the physiography and the predominant texture of surficial geologic units in the Mid-Atlantic Coastal Plain. It describes the primary natural physical factors that affect the flow and chemistry of shallow ground water and small streams in the Mid-Atlantic Coastal Plain. Seven hydrogeologic subregions were defined. Some of the subregions correspond directly to the physiographic... Tags: Coastal Plain, Coastal Plain, Delaware, Maryland, Mid-Atlantic, All tags... Mid-Atlantic, NSDI, New Jersey, North Carolina, Pennsylvania, USGS Science Data Catalog (SDC), Virginia, Washington, D.C., environment, framework, geology, geoscientificInformation, groundwater, hydrogeology, inland waters, inlandWaters, physiography, surficial, Fewer tags Chemistry analysis results for groundwater, soil-pore water, soil and plant material collected from two agricultural sites in the Nanticoke and Chester River watersheds on the Delmarva Peninsula from 2013 to 2016 This metadata record documents 8 comma delimitated files that support the USGS Scientific Investigations Report 2018-5020 on field studies in the Bucks Branch watershed and the Andover Branch watershed. Data were collected from two fields at two locations and include: groundwater, soil water, soils and plant tissue chemistry. Data also include sulfur hexafluoride and dissolved gas concentrations used in age dating of groundwater. Categories: Data; Tags: Agriculture, Chesapeake Bay Watershed, Coastal Plain, Cover Crop, Delmarva Peninsula, All tags... Environmental Health, Humid Subtropical, Hydrogeology, Kjeldahl nitrogen, Land Use Change, Soil Sciences, USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, agriculture, groundwater and surface-water interaction, groundwater level, groundwater quality, hydrogeology, irrigation, nitrogen, nutrient content (water), nutrient pollution, soil moisture, unsaturated zone, Fewer tags Physiography for the Mid-Atlantic Coastal Plain These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Physiography for the Mid-Atlantic Coastal Plain was constructed by standardizing and extrapolating previous physiographic interpretations for areas within and adjacent to the region. For more information, see U. S. Geological Survey Professional Paper 1680. Tags: Coastal Plain, Coastal Plain, Delaware, Maryland, Mid-Atlantic, All tags... NSDI, New Jersey, North Carolina, Pennsylvania, USGS Science Data Catalog (SDC), Virginia, Washington, D.C., environment, geology, geoscientificInformation, groundwater, inlandWaters, inlandWaters, physiography, Fewer tags Data in support of the occurrence and distribution of per- and polyfluoroalkyl substances in sampled source water of public drinking-water supplies in the surficial aquifer in Delaware, 2018 Thirty water-supply drinking-water wells were sampled during fall 2018 for a set of constituents including PFAS. Groundwater samples were sent to Maxxam Laboratories (RTI Laboratory contract) to be analyzed for eighteen PFAS using USEPA 537m method. Groundwater age data were collected and analyzed as well in the USGS Reston, Va. laboratory. Quality-control samples including equipment and field blanks, sequential replicate samples, and laboratory spikes, were collected to evaluate and estimate potential contamination bias and measure variability from water-quality data-collection processes. No PFAS were detected in equipment or field blanks indicating that selected equipment, cleaning, sampling, and handling procedures... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Coastal Plain, Delaware, Emergent contaminants, Groundwater age, Groundwater quality, All tags... Hydrology, Kent County, New Castle County, PFAS, Surficial Aquifer, Sussex County, USGS Science Data Catalog (SDC), Water Quality, Water sampling, inlandWaters, per- and polyfluoroalkyl substances, Fewer tags Borehole geologic-unit top-surface altitude and aquifer-component test data for the Piney Point aquifer, Virginia from 2009 through 2015 This USGS data release contains (1) geologic-unit top-surface altitudes in boreholes and (2) aquifer-test time-series water-level drawdowns, recoveries, and supporting data from the Piney Point aquifer in Virginia from 2009 through 2015. Extents, compositions, configurations, and geologic relations of six geologic units that compose the Piney Point aquifer were determined from geologists’ logs of sediment core and cuttings, borehole geophysical logs, and drillers’ logs. The Piney Point aquifer is characterized to address information needs for water-resource management in the Virginia Coastal Plain. Information on the Piney Point aquifer can benefit water-resource management in siting production wells, predicting... Tags: Coastal Plain, Piney Point aquifer, Structural Geology, USGS Science Data Catalog (SDC), Virginia, All tags... geology, groundwater, hydraulic properties, hydrogeologic framework, water supply, Fewer tags Application of the North Carolina Stochastic Empirical Loading and Dilution Model (SELDM) to Assess Potential Impacts of Highway Runoff In 2013, the U.S. Geological Survey (USGS) in partnership with the U.S. Federal Highway Administration (FHWA) published a new national stormwater quality model called the Stochastic Empirical Loading Dilution Model (SELDM; Granato, 2013). The model is optimized for roadway projects but in theory can be applied to a broad range of development types. SELDM is a statistically-based empirical model pre-populated with much of the data required to successfully run the application (Granato, 2013). The model uses Monte Carlo methods (as opposed to deterministic methods) to generate a wide range of precipitation events and stormwater discharges coupled with water-quality constituent concentrations and loads from the upstream... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Best Management Practice (BMP), Blue Ridge, Coastal Plain, Event Mean Concentration, Federal Highway Administration, All tags... Highway runoff, Highway-Runoff Database, Hydrology, North Carolina, Piedmont, Runoff, SELDM, State Highway, Stochastic Empirical Loading and Dilution Model, Stormwater, Streamflow, USGS Science Data Catalog (SDC), United States, Urban Runoff, Water Quality, Water Quality, Water Resources, Water Resources, chemical constituents, environment, highways and roads, physical constituents, stormwater, transportation, Fewer tags Thickness of the Surficial Aquifer, Delmarva Peninsula, Maryland and Delaware A digital map of the thickness of the surficial unconfined aquifer, including from the land surface and unsaturated zone to the bottom of sediments of geologic units identified as part of the surficial aquifer, was produced to improve understanding of the hydrologic system in the Maryland and Delaware portions of the Delmarva Peninsula. The map is intended to be used in conjunction with other environmental coverages (such land use, wetlands, and soil characteristics) to provide a subsurface hydrogeologic component to studies of nitrate transport that have historically relied on maps of surficial features. It could also be used to study the transport of other water soluble chemicals. The map was made using the... Types: Citation; Tags: Aquifer Thickness, Coastal Plain, Coastal Plain Aquifer, Delaware, Groundwater, All tags... Maryland, Northern Atlantic Coastal Plain, Quaternary Sediments, Raster Dataset, USGS Science Data Catalog (SDC), United States, Water Quality, Water Quality, environment, geoscientificInformation, inlandWaters, Fewer tags Vertical gradients of filtered methylmercury, filtered total mercury, dissolved organic carbon, and dissolved chloride in stream-bed sediments at SixMile Brook, New York and McTier Creek, South Carolina during summer 2009 Data includes fine‑scale (1.5 cm minimum resolution) vertical solute concentrations for filtered methylmercury (ng/L), filtered total mercury (ng/L), dissolved organic carbon (mg/L), and dissolved chloride (micromole/L) in SixMile Brook, New York and McTier Creek, South Carolina. Vertical solute data were assessed one time at one site in each stream in 2009, at edge-of-water (margin) and center-of-channel (channel) using two mini-piezometer (USGS MINIPOINT) devices (seven 0.325 cm stainless steel tubes, 0.8 cm screened interval). Each MINIPOINT device was installed with sampling points in surface water and at approximately 1.5, 4.5, 7.5, 12.5, 17.5, 30, and 60 cm below the bed-sediment/surface water interface. Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Adirondacks, Coastal Plain, New York, South Carolina, USGS Science Data Catalog (SDC), All tags... Water Quality, dissolved organic carbon, headwater streams, methylmercury, total mercury, Fewer tags Inputs and Selected Outputs Used to Assess Stormwater Quality and Quantity in Twelve Urban Watersheds in Hampton Roads, Virginia, 2016 - 2020 Nitrogen (N), phosphorus (P), and total suspended solids (TSS) loads, in Hampton Roads, Virginia stormwater conveyance systems have been calculated using monitoring data from 12 intensively monitored watersheds for the period from water year (October - September) 2016 through 2020. Nutrient and TSS loads were computed using a surrogate (multiple-linear regression) approach with lab analyzed N, P, and TSS samples as the response variable and basic water-quality parameters (e.g. turbidity, specific conductance, water temperature), streamflow, a baseflow separation Boolean term, and time and seasonal terms as predictor (surrogate) variables. Load results represent the mass of N, P, and TSS exported from each of the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Coastal Plain, Hampton Roads, USGS Science Data Catalog (SDC), Virginia, Water Quality, All tags... Water Resources, biota, load analysis, nitrogen, phosphorus, sediment, stormwater, surrogate regression, total suspended solids, urban, water quality, Fewer tags Surficial Geology for the Mid-Atlantic Coastal Plain. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Surficial geology for the Mid-Atlantic Coastal Plain was compiled and interpreted from available published and unpublished sources. Formation contacts were interpolated across unmapped areas and inconsistencies in nomenclature, interpretation, and scale were resolved to the extent possible. For more information, see U. S. Geological Survey Professional Paper 1680. Categories: pre-SM502.8; Tags: Coastal Plain, Coastal Plain, Delaware, Maryland, Mid-Atlantic, All tags... Mid-Atlantic, NSDI, New Jersey, North Carolina, Pennsylvania, Predominant Texture, Surficial Geology, USGS Science Data Catalog (SDC), Virginia, Washington, D.C., environment, geoscientificInformation, groundwater, inlandWaters, inlandWaters, Fewer tags Subcropping Geology for the Mid-Atlantic Coastal Plain These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Subcropping geology for the Mid-Atlantic Coastal Plain was compiled and interpreted from available published sources. Formation contacts were interpolated across unmapped areas. Inconsistencies in nomenclature, interpretation, and scale were resolved to the extent possible, although some remain because of differences in mapping resolution among different areas. For more information, see U. S. Geological Survey Professional Paper... Categories: pre-SM502.8; Tags: Coastal Plain, Coastal Plain, Delaware, Geology, Maryland, All tags... Mid-Atlantic, Mid-Atlantic, NSDI, New Jersey, North Carolina, Pennsylvania, Subcrop, Texture, USGS Science Data Catalog (SDC), Virginia, Washington, D.C., environment, geoscientificInformation, groundwater, inlandWaters, inlandWaters, Fewer tags