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Direct Current Resistivity Data DC Resitivity Methodology Direct current (DC) resistivity transects were surveyed using an IRIS Syscal Pro Switch 96 instrument (IRIS Instruments, Inc., Orléans, France). Steel electrodes were hammered into the ground at a fixed distance along the profile. These were connected to the instrument using copper wires and junction boxes. The number of electrodes on each profile and their spacing is shown below: Line 1: 180 electrodes, 5 meter spacing Line 2: 48 electrodes, 2 meter spacing Line 3: 48 electrodes, 2 meter spacing Line 4: 24 electrodes, 2 meter spacing Line 5: 36 electrodes, 2 meter spacing On Line 1, the roll-along method was used to extend the line to its full extent. In this method, 48 electrodes... Categories: Data Soil-Water-Balance (SWB) model data sets for Fauquier County, Virginia, 1996 - 2015 A Soil-Water-Balance (SWB) model was developed to estimate annual recharge and evapotranspiration (ET) for Fauquier County, Virginia, for the period 1996 through 2015. The model was developed as part of a study to assess groundwater availability in the fractured-rock aquifers underlying Fauquier County. The model is documented in the associated report, U.S. Geological Survey (USGS) Scientific Investigations Report 2019-5056. The model was calibrated by comparing annual base-flow estimates from the hydrograph separation technique PART to annual recharge estimates from the SWB model for available years of streamflow record at two sites (01643700 and 01656000) within the model area. Selected SWB model parameters were... Tags: Fauquier County, Hydrogeology, SWB, Soil-Water-Balance, USGS Science Data Catalog (SDC), All tags... Virginia, Water Resources, evapotranspiration, groundwater, inlandWaters, recharge, water budget, Fewer tags Frequency Domain Electromagnetic Data - Raw Data FDEM Methodology For this project frequency domain electromagnetic (FDEM) data were collected with a GEM-2, a broadband, multifrequency, fixed-coil electromagnetic induction unit (Geophex, 2015). Both in-phase and quadrature data were collected on 15 channels from a frequency of 810 Hz to 66,090 Hz. This system was carried along profiles that followed the axis of the dam and along tie lines that were perpendicular to the axis of the dam. Each data point was located using a backpack mounted GPS. To correct the drift of the instrument, a base station was established on the east side of the dam. Each survey started and ended with an occupation of the base station. These occupations occur as even line numbers... Categories: Data Spatial and elevation points surveyed for indirect measurements of peak streamflow associated with flooding of September to November 2017 in Puerto Rico This dataset contains topographic (horizontal and vertical) data for 20 sites, surveyed November 6 to November 28, 2017 as part of documentation of flooding that occurred in Puerto Rico during and after Hurricane Maria (September to November 2017). Hurricane Maria hit the Island of Puerto Rico on September 20, 2017 and was one of the deadliest storms in U.S. history. USGS personnel conducted topographic surveys at selected stream sites to facilitate hydraulic modeling of peak streamflows (or discharges) – termed indirect measurements – using published standard USGS methods. Indirect (post-flood) measurements are used to characterize flood peaks that could not be determined using direct methods (for example current-velocity... Categories: Data; Tags: Caribbean, Eastern Caribbean, Elevation, GPS measurement, Global Positioning System (GPS) observations, All tags... Hurricane Maria, Puerto Rico, controlled flooding, elevation, field inventory and monitoring, flooding, hurricanes, indirect measurement, land surveying, peak discharge, river reaches, rivers, storms, storms, stream discharge, topographic survey, tropical cyclones (hurricanes and typhoons), Fewer tags Spreadsheet of quantiles of change factors at 242 NOAA Atlas 14 stations in Florida derived from downscaled climate datasets considering all models, and the RCP4.5 and SSP2-4.5 future emission scenarios (CFquantiles_2070_to_historical_all_models_RCP4.5.xlsx) The Florida Flood Hub for Applied Research and Innovation and the U.S. Geological Survey have developed projected future change factors for precipitation depth-duration-frequency (DDF) curves at 242 NOAA Atlas 14 stations in Florida. The change factors were computed as the ratio of projected future to historical extreme-precipitation depths fitted to extreme-precipitation data from downscaled climate datasets using a constrained maximum likelihood (CML) approach as described in https://doi.org/10.3133/sir20225093. The change factors correspond to the period 2050-89 (centered in the year 2070) as compared to the 1966-2005 historical period. A Microsoft Excel workbook is provided which tabulates quantiles of change... Categories: Data; Tags: Florida, Florida, Florida Flood Hub for Applied Research and Innovation, climatologyMeteorologyAtmosphere, depth-duration-frequency, All tags... extremes, precipitation (atmospheric), precipitation extremes, Fewer tags Spreadsheet of projected future precipitation depths at 242 NOAA Atlas 14 stations in Florida fitted to extreme-precipitation events derived from the MACA downscaled climate dataset (DDF_MACA_future_2070.xlsx) The Florida Flood Hub for Applied Research and Innovation and the U.S. Geological Survey have developed projected future change factors for precipitation depth-duration-frequency (DDF) curves at 242 NOAA Atlas 14 stations in Florida. The change factors were computed as the ratio of projected future to historical extreme-precipitation depths fitted to extreme-precipitation data from downscaled climate datasets using a constrained maximum likelihood (CML) approach as described in https://doi.org/10.3133/sir20225093. The change factors correspond to the period 2050-89 (centered in the year 2070) as compared to the 1966-2005 historical period. A Microsoft Excel workbook is provided which tabulates projected future... Categories: Data; Tags: Florida, Florida, Florida Flood Hub for Applied Research and Innovation, climatologyMeteorologyAtmosphere, depth-duration-frequency, All tags... extremes, precipitation (atmospheric), precipitation extremes, Fewer tags Spreadsheet of quantiles of change factors at 242 NOAA Atlas 14 stations in Florida derived from downscaled climate datasets considering only the best models and all future emission scenarios evaluated (CFquantiles_2040_to_historical_best_models_allRCPs.xlsx) The Florida Flood Hub for Applied Research and Innovation and the U.S. Geological Survey have developed projected future change factors for precipitation depth-duration-frequency (DDF) curves at 242 NOAA Atlas 14 stations in Florida. The change factors were computed as the ratio of projected future to historical extreme-precipitation depths fitted to extreme-precipitation data from downscaled climate datasets using a constrained maximum likelihood (CML) approach as described in https://doi.org/10.3133/sir20225093. The change factors correspond to the period 2020-59 (centered in the year 2040) as compared to the 1966-2005 historical period. A Microsoft Excel workbook is provided which tabulates quantiles of change... Categories: Data; Tags: Florida, Florida, Florida Flood Hub for Applied Research and Innovation, climatologyMeteorologyAtmosphere, depth-duration-frequency, All tags... extremes, precipitation (atmospheric), precipitation extremes, Fewer tags Woodbury, Tennessee Karst Groundwater Dye Tracing Water Year 2022 Karst hydrologic systems are important resources in the state of Tennessee both as drinking water resources and as centers for possible biological diversity. These systems are susceptible to contamination due to the inherent connectivity between surface water and groundwater systems in karst systems. A partnership between the U.S. Geological Survey (USGS) and Tennessee Department of Conservation (TDEC) was formed to investigate karst spring systems across the state utilizing fluorescent groundwater tracing, particularly in areas where these resources may be used as drinking water sources. In fall 2021, USGS and TDEC staff identified possible vulnerabilities or complexities that may exist within karst spring systems... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Cannon County, Cavender Branch, Doolittle Branch, Dye Trace, East Fork of the Stones River, All tags... Eastern Highland Rim, Hydrogeology, Hydrology, Karst, Parchcorn Hollow, Short Mountain, Springs, TDEC, Tennessee, Tennessee, Tennessee Department of Environment and Conservation, WOODBURY TENNESSEE DYE TRACING SPRINGS CAVES KARST GEOLOGY HYDROLOGY, Woodbury, Woodbury Water Department, caves, caves, dye tracing, dye tracing, groundwater, groundwater and surface-water interaction, groundwater flow, groundwater tracing, hydrogeology, karst, karst, karst, karst hydrology, karst hydrology, karst topography, Fewer tags Cowan, Tennessee Karst Groundwater Dye Tracing Water Year 2022 Karst hydrologic systems are important resources in the state of Tennessee both as drinking water resources and as centers for possible biological diversity. These systems are susceptible to contamination due to the inherent connectivity between surface water and groundwater systems in karst systems. A partnership between the U.S. Geological Survey (USGS) and Tennessee Department of Conservation (TDEC) was formed to investigate karst spring systems across the state utilizing fluorescent groundwater tracing, particularly in areas where these resources may be used as drinking water sources. In fall 2021, USGS and TDEC staff identified possible vulnerabilities or complexities that may exist within karst spring systems... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Boiling Fork Creek, COWAN TENNESSEE DYE TRACING SPRINGS CAVES KARST GEOLOGY HYDROLOGY, Cowan, Cowan, Cumberland Plateau, All tags... Dye Trace, Franklin County, Hawkins Cove, Hydrogeology, Hydrology, Karst, Sawanee, Springs, TDEC, Tennessee, Tennessee, Tennessee Department of Environment and Conservation, University of the South, caves, caves, dye tracing, dye tracing, groundwater, groundwater and surface-water interaction, groundwater flow, groundwater tracing, hydrogeology, karst, karst, karst, karst hydrology, karst hydrology, karst topography, Fewer tags Output Data by HUC4 Sub-basin for Hydrologic Simulations of the CONUS using the NHM-PRMS, 1950-2010, Maurer Calibration, Dynamic Parameters This data release contains inputs for and outputs from hydrologic simulations for the conterminous United States (CONUS) using the Precipitation Runoff Modeling System (PRMS) version 5.1.0 and the USGS National Hydrologic Model Infrastructure (NHMI, Regan and others, 2018). Historical simulations using the Maurer forcings (Maurer and others, 2002) were conducted for the period 1950-2010. This metadata record documents the simulation output files for simulations ran using the dynamic parameters file. The output files are aggregated at the HUC4 level and are grouped and downloadable by HUC2 hydrologic region. Each zip folder contains identical information, just for a different region and set of hydrologic response... Categories: Data; Tags: United States, inlandWaters, model, streamflow, streamflow modeling Polygon Locations of Basins upstream from Dams in South Carolina, derived from U.S. Army Corps Engineers National Inventory of Dams Reliable peak-streamflow information is critical for proper design of stream-related infrastructure, such as bridges, and StreamStats provides a user-friendly interface to estimate peak flows (https://streamstats.usgs .gov/ss/). StreamStats develops these peak-flow estimates using basin characteristics for the entire contributing area to a user-selected point; however, infrastructure planners often need to estimate flows for an area downstream from a known control such as a reservoir release or a weir. This dataset was compiled in cooperation with the South Carolina Department of Transportation (SCDOT) to provide a Geographic Information System (GIS) layer of filtered regulation points from the U.S. Army Corps Engineers... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Georgia, North Carolina, Region 1, Region 2, Region 3, All tags... Region 4, Region 5, South Carolina, bridges, dam sites, watershed management, Fewer tags Monthly Aquaculture and Irrigation Water-Use Estimates by Use for the Mississippi Alluvial Plain, 1999-2017 These monthly water-use rasters estimate the total amount of groundwater used for aquaculture and irrigation purposes within the Mississippi Alluvial Plain during the growing season (April-October). This dataset contains 798 monthly water-use rasters for 6 different categories: aquaculture, cotton, corn, rice, soybeans, and all other crops. Units are in cubic meters per square mile. Tags: Alabama, Arkansas, Illinois, Kentucky, Louisiana, All tags... Mississippi, Missouri, Tennessee, Texas, aquaculture water use, remote sensing, water supply and demand, water use, Fewer tags Annual Aquaculture and Irrigation Water-Use Estimates for the Mississippi Alluvial Plain, 1999-2017 The annual water-use rasters estimate the total amount of groundwater used for aquaculture and irrigation purposes within the Mississippi Alluvial Plain. This dataset contains 19 annual water-use rasters that are totals of 6 different use categories: aquaculture, cotton, corn, rice, soybeans, and all other crops. Units are in cubic meters per square mile. Tags: Alabama, Arkansas, Illinois, Kentucky, Louisiana, All tags... Mississippi, Missouri, Tennessee, Texas, aquaculture water use, remote sensing, water supply and demand, water use, Fewer tags Monthly Aquaculture and Irrigation Water-Use Estimates for the Mississippi Alluvial Plain, 1999-2017 These monthly water-use rasters estimate the total amount of groundwater used for aquaculture and irrigation purposes within the Mississippi Alluvial Plain during the growing season (April-October). This dataset contains 133 monthly water-use rasters that are totals of 6 different categories: aquaculture, cotton, corn, rice, soybeans, and all other crops. Units are in cubic meters per square mile. Aquaculture and irrigation water-use estimates are included in this data release in two different formats: georeferenced TIFFs (GeoTIFFs) for simple viewing and geospatial operations and a network common data form (NetCDF) for use in modeling applications and with each month as a separate raster array table. Tags: Alabama, Arkansas, Illinois, Kentucky, Louisiana, All tags... Mississippi, Missouri, Tennessee, Texas, aquaculture water use, remote sensing, water supply and demand, water use, Fewer tags Radioisotopic data from USGS laboratory in St. Petersburg, Florida Specific activities of cesium-137 (half life = 30.17 years), lead-210 (half life = 22.3 years), radium-226 (half life = 1,600 years), thorium-234 (half life = 24.1 days), and potassium-40 (half life = 1.277 billion years) in disintegrations per minute per gram (dpm/g) were determined for the Lake Lanier cores. The laboratory errors (plus or minus) and the critical levels are included for each sample. Categories: Data; Tags: Georgia, Gwinnett County, Lake Sidney Lanier, cesium-137, inlandWaters, All tags... lead-210, potassium-40, radiometric dating, radium-226, thorium-234, Fewer tags Chemical-Gene and Chemical-Pathway Interactions Predicted for Chemicals Detected in the USGS-USEPA National Streams Pilot Study Based on Effects Data in the Comparative Toxicogenomics Database (CTD) Data from study assessing the utility of knowledgebase-leveraging of comprehensive environmental-contaminant-exposure datasets by comparing biological effects predicted on the basis of target chemical analyses with measured biological effects in corresponding split water samples. Tags: Aquatic Biology, Comparative Toxicogenomics Database, Environmental Health, U.S.A., USGS Science Data Catalog (SDC), All tags... Water Quality, biota, computational toxicology, endocrine activity, knowledgebase, mutagenicity, surface water, Fewer tags Prediction grids of pH Groundwater is a vital resource to the Mississippi embayment region of the central United States. Regional and integrated assessments of water availability that link physical flow models and water quality in principal aquifer systems provide context for the long-term availability of these water resources. An innovative approach using machine learning was employed to predict groundwater pH across drinking water aquifers of the Mississippi embayment. The region includes two principal regional aquifer systems; the Mississippi River Valley alluvial (MRVA) aquifer and the Mississippi embayment aquifer system that includes several regional aquifers and confining units. Based on the distribution of groundwater use for... Tags: Alabama, Arkansas, Illinois, Kentucky, Louisiana, All tags... Mississippi, Tennessee, aquifer, boosted regression tree, groundwater, groundwater quality, machine learning, mathematical modeling, Fewer tags Structure Contours from Top of Sparta Aquifer from Figure 2, 1996, from Hydrogeology and Potentiometric Surface of the Sparta Aquifer in Northern Louisiana, October 1996 (Brantly, Seanor, and McCoy, 2002) This report describes the thickness and areal extent of the Sparta aquifer, identifies sands within the fresh-water extent of the aquifer, and presents data and a map that illustrate the generalized potentiometric surface (water levels) during October 1996. The report includes a detailed geophysical log, structure contour maps, hydrogeologic sections, and hydrographs of water levels in selected wells. The potentiometric surface-map can be used for determining direction of ground-water flow, hydraulic gradients, and the effects of withdrawals on the aquifer. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Louisiana, Mississippi Embayment, Sparta aquifer, altitude, downdip limit, All tags... groundwater, structure contour, western extent, Fewer tags Scenario calculator for Tennessee SPARROW nutrient models This data release consists of the data used to develop SPAtially Referenced Regression On Watershed(SPARROW) attributes models for estimating loads of total phosphorus and total nitrogen in Tennessee streams. These data support the publication containing the Tennessee SPARROW models results (Hoos and others, 2019) and include model input used in the South Atlantic-Gulf Drainages and Tennessee River Basin (SAGT) nutrient SPARROW models (Hoos and McMahon, 2009; Garcia and others, 2011) as well as model input for river basins in Tennessee not included in the domain of the published SAGT SPARROW models. Also included in this data release are model coefficients, the software required to execute the Tennessee SPARROW... Tags: SPARROW, Tennessee, nitrogen, nutrients, phosphorus, All tags... surface-water quality, Fewer tags Structure Contours of the Base of the Sparta Sand from Plate 3, 1968, from Hydrologic significance of the lithofacies of the Sparta Sand in Arkansas, Louisiana, Mississippi, and Texas (Payne, 1968) The study of the geohydrology of the Sparta Sand is the initial phase in the investigation of the geohydrology of the Claiborne Group. The thicker sections of the Sparta Sand lie along the axes of the Mississippi embayment and Desha basin. The area of maximum thickness, 1,100-1,200 feet, is in Claiborne and Warren Counties, Miss., and Madison Parish, La. Local thickening or thinning over some structures indicates structural movement during Sparta time. A sand-percentage map prepared from data derived from interpretation of electric logs indicates that the Sparta Sand was deposited as a delta-fluvial plain complex in Arkansas, Louisiana, and Mississippi. This complex shows a text-book example of a well-developed... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Louisiana, Mississippi, Mississippi Embayment, Sparta Sand, All tags... base, groundwater, structure contour, Fewer tags 1 2 3 4 5 ... 8 »