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Location Folder Show Tree ROOT _ScienceBase Catalog __USGS Lower Mississippi-Gulf Water Science Center ___@ Mississippi Alluvial Plain (MAP) Regional Water-Availability Study Economics, Groundwater Modeling, and Decision Support Groundwater Levels Hydrogeologic Framework Quality Assurance of Water Level Records from Wells in the Mississippi River Valley Alluvial Aquifer in Missouri from the Missouri Department of Natural Resource's Well Information Management System (WIMS) Surface Water Model More... Filters Date Range Past year (5) Past month (1) Past week (1) Past day (0) Custom range... To   Search Extensions ArcGIS Service Definition (9) Shapefile (3) Types Downloadable (12) OGC WFS Layer (10) OGC WMS Layer (10) ArcGIS REST Map Service (9) ArcGIS Service Definition (9) More... Contacts U.S. Geological Survey - ScienceBase Water Resources U.S. Geological Survey Virginia L McGuire Nebraska Water Science Center More... Categories Data (13) Data Release - Revised (1) Tag Types Theme (19) Place (19) USGS Scientific Topic Keyword (7) Harvest Set (14) Tag Schemes USGS Thesaurus (15) None (8) Common geographic areas (7) Geographic Names Information System (GNIS) (5) ISO 19115 Topic Category (11) USGS Thesaurus Groundwater (1) Common geographic names (1) More... View Results as: JSON ATOM CSV Browse Folder

Hydrogeologic Aquifer Test dataset, Lower Mississippi-Gulf Water Science Center, December 2021 Since the 1940's, commercial, academic and government hydrologists have used aquifer tests to estimate the hydrogeologic properties of an aquifer near test wells. Results from these tests are recorded in various files, databases, reports, and scientific publications. The U.S. Geological Survey (USGS), Lower Mississippi-Gulf Water Science Center (LMG) is aggregating all aquifer test results from Alabama, Arkansas, Louisiana, Mississippi, and Tennessee into a single dataset that is publicly available in a machine-readable format. The LMG-Hydrogeologic Aquifer Test Dataset – December 2021 contains information and results from 690 hydrogeologic aquifer tests. Additionally, this dataset contains 7 attribute tables... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alabama, Alabama (AL), Aquifer, Aquifer, Aquifer Test, All tags... Aquifer Test, Arkansas, Arkansas, Conductivity, Conductivity, Groundwater, Groundwater, Hydrogeology, Hydrogeology, Louisiana, Louisiana, Lower Mississippi Gulf Water Science Center, Mississippi, Mississippi, Mississippi Alluvial Plain (MAP) Project, Mississippi Alluvial Plain (MAP) Project, Permeability, Permeability, Specific Capacity, Specific Capacity, Storage Coefficient, Storage Coefficient, Tennessee, Tennessee (TN), Transmissivity, Transmissivity, Fewer tags Hydraulic Conductivity and Transmissivity Estimates from Slug Tests in Wells Within the Mississippi Alluvial Plain, Arkansas and Mississippi, 2020 During the spring and summer of 2020, the U.S. Geological Survey, Lower Mississippi – Gulf Water Science Center, conducted single well slug tests on selected wells within the Mississippi Alluvial Plain in Arkansas and Mississippi to estimate hydraulic conductivity (K) and transmissivity (T) values for the aquifers in which the wells are screened. A total of 324 tests were conducted on 48 wells. The computer software AQTESOLV version 4.50.002 (HydroSOLVE, Inc., 2007) was used to interpret the slug test data to estimate K and T values. Mean estimates of K for the 44 wells screened in the Mississippi River Valley alluvial aquifer ranged from 3 to 401 feet per day (ft/day) and mean estimates of T ranged from 285 to... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: 500-Foot Sand Memphis Sand, 500-Foot Sand Memphis Sand, 500-foot Sand, Ar, Arkansas, All tags... Common geographic areas, Conductivity, Groundwataer, Groundwataer, Groundwater, Hydraulic Conductivity, Hydraulic Conductivity, Instantaneous change in head test, Instantaneous change in head test, Memphis Sand, Mississippi, Mississippi Alluvial plain, Mississippi River Valley alluvial aquifer, Mississippi River Valley alluvial aquifer, Mississippi embayment aquifer system, Mississippi embayment aquifer system, Slug Test, Slug Test, Sparta Sand, Sparta Sand, Transmissivity, Transmissivity, USGS Science Data Catalog (SDC), middle Claborne aquifer, middle Claiborne aquifer, middle Claiborne aquifer, Fewer tags Airborne electromagnetic, magnetic, and radiometric surveys of the Mississippi Alluvial Plain and Chicot Aquifer System, March 2018 and May - August 2021 Airborne geophysical surveys were acquired in March 2018 and May 25 through August 7, 2021 using a helicopter-based platform. These surveys were collected along 10,706 line-kilometers (line-km) within selected areas of the Mississippi Alluvial Plain (MAP) and the Chicot Aquifer System in the southeastern United States. The airborne geophysical surveys include electromagnetic, magnetic, and radiometric sensor data collected in rivers and levees throughout the two areas to evaluate groundwater and surface-water interaction, riverine ecosystems, and infrastructure. This data release contains three child items that provide: Minimally processed (raw) data supplied by the airborne contractor (Xcalibur Multiphysics)... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: "Geomorphology"], "Hydrology", "Sedimentology", "Stratigraphy", "Water Resources", All tags... Arkansas, Arkansas River, Bayou Lacassine, Bayou Teche, Big Sunflower River, Black River, Bogue Phalia, Calcasieu River, Chicot aquifer, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Illinois, Little Red River, Little Sunflower River, Louisiana, MRVA, Mermentau River, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Valley Alluvial aquifer, Missouri, Obion River, Ouachita River, Raccourci Old River, Sabine River, Saline River, Tennessee, Tensas River, USGS Science Data Catalog (SDC), Vermillion River, WAUSP, Water Availability and Use Science Program, White River, ["Geophysics", aeromagnetic surveying, aeroradiometric surveying, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, magnetic field, magnetics, radiometrics, resistivity, water resources, Fewer tags Digital Dataset for the Geomorphology of the Lower Mississippi River Valley in Missouri, Kentucky, Arkansas, Tennessee, Louisiana, and Mississippi A digital dataset of the geomorphology of the Lower Mississippi River Valley in Missouri, Kentucky, Arkansas, Tennessee, Louisiana, and Mississippi was developed from Roger T. Saucier’s “Geomorphology and Quaternary Geologic History of the Lower Mississippi Valley, Volumes I and II” (1994) as part of the Mississippi Alluvial Plain (MAP) Regional Water Availability Study. The maps included in the 1994 reports provide a comprehensive overview of the previously misunderstood alluvial valley geology and characterize twenty-nine Pleistocene and Holocene alluvial deposits, such as point bars, abandoned channels, backswamps, and natural levees. Each map was georeferenced to North American Datum 1983 and projected to USA... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Citation, Downloadable, Map Service; Tags: Alluvial Fan, Apron, Arkansas, Arkansas, Arkansas River, All tags... Deweyville Complex, Early Wisconsin Stage, Holocene, Illinois, Illinois, Intermediate Complex, Kentucky, Kentucky, Lacustrine, Late Wisconsin Stage, Louisiana, Louisiana, Mississippi, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River, Mississippi River Delta, Mississippi Valley, Missouri, Missouri, Pleistocene, Prairie Complex, Quaternary, Saucier, Tennessee, Tennessee, USGS Science Data Catalog (SDC), abandoned channel, abandoned courses, abandoned deltaic distributaries, alluvial system, backswamp deposit, chenier, delineation, floodbasin deposit, geologic history, geomorphology, geomorphology, inland swamp deposit, interdistributary deposits, lacustrine deltaic deposit, meander scroll, natural levee, point bar, relict beach ridges, relict channel, sand dune field, undifferentiated alluvium, undifferentiated fluvial deposit, undifferentiated paludal deposit, valley train, Fewer tags Digital surfaces of the bottom altitude and thickness of the Mississippi River Valley alluvial aquifer and site data within the Mississippi Alluvial Plain project region Bottom altitudes of the Mississippi River Valley alluvial aquifer (MRVA) were compiled from interpretations of subsurface geophysical logs (log picks) at about 10,000 boreholes and wells located throughout the Mississippi Alluvial Plain (MAP) that were available from previous investigations. Five sources of the bottom altitude data are listed numerically in the Cross Reference section (below) and correspond with the Ref_code listed in the .shp dataset. Borehole geophysical data (log picks) were referenced (corrected) to the National Elevation Dataset (NED) 10-meter digital elevation model (DEM; https://nationalmap.gov/elevation.html). Log picks that required a DEM correction of less than 20 feet were retained for... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Arkansas River, Cross Validation, Crowley's Ridge, Geostatistics, All tags... Kriging, Louisiana, Lower Mississippi-Gulf Water Science, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Delta, Mississippi River Valley Alluvial Aquifer, Mississippi Valley, Missouri, Tennessee, USGS Science Data Catalog (SDC), Variogram modeling, hydrogeology, Fewer tags (c) Surface-water altitude data, from streamgages, considered for the potentiometric surface map, Mississippi River Valley alluvial aquifer, spring 2016 A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical Datum of 1988 (NAVD 88), using most of the available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time, after installation, but some wells were measured more than one time in a year and a small number of wells were measured continually. Streamgages were typically operated continuously. The potentiometric surface map for 2016 was created as part of the U.S. Geological Survey (USGS) Water Availability and Use Science Program to support investigations that characterize... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Illinois, Kentucky, LMG, Louisiana, All tags... Lower Mississippi Gulf Water Science Center, MAP, MRVA aquifer, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River Delta, Mississippi River Valley alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, U.S.Geological Survey, USGS, Water Availability and Use Science Program, aquifers, geoscientificInformation, ground water, groundwater, groundwater levels, inlandWaters, potentiometric surface, surface-water altitude, water table, Fewer tags (b) Groundwater altitude data, from driller-measured wells, considered for the potentiometric surface, Mississippi River Valley alluvial aquifer, spring 2016 A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical Datum of 1988 (NAVD 88), using most of the available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time, after installation, but some wells were measured more than one time in a year and a small number of wells were measured continually. Streamgages were typically operated continuously. The potentiometric surface map for 2016 was created as part of the U.S. Geological Survey (USGS) Water Availability and Use Science Program to support investigations that characterize... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Illinois, Kentucky, LMG, Louisiana, All tags... Lower Mississippi Gulf Water Science Center, MAP, MRVA aquifer, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River Delta, Mississippi River Valley alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, U.S.Geological Survey, USGS, Water Availability and Use Science Program, aquifers, geoscientificInformation, ground water, groundwater, groundwater altitude, groundwater levels, inlandWaters, potentiometric surface, water table, Fewer tags (a) Groundwater altitude data, from monitoring-networks wells, considered for the potentiometric surface map, Mississippi River Valley alluvial aquifer, spring 2016 A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical Datum of 1988 (NAVD 88), using most of the available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time, after installation, but some wells were measured more than one time in a year and a small number of wells were measured continually. Streamgages were typically operated continuously. The potentiometric surface map for 2016 was created as part of the U.S. Geological Survey (USGS) Water Availability and Use Science Program to support investigations that characterize... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Illinois, Kentucky, LMG, Louisiana, All tags... Lower Mississippi Gulf Water Science Center, MAP, MRVA aquifer, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River Delta, Mississippi River Valley alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, U.S.Geological Survey, USGS, Water Availability and Use Science Program, aquifers, geoscientificInformation, ground water, groundwater, groundwater altitude, groundwater levels, inlandWaters, potentiometric surface, water table, Fewer tags (d) Spatial data set of the potentiometric surface contours, Mississippi River Valley alluvial aquifer, spring 2016, in feet A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical Datum of 1988 (NAVD 88), using most of the available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time, after installation, but some wells were measured more than one time in a year and a small number of wells were measured continually. Streamgages were typically operated continuously. The potentiometric surface map for 2016 was created as part of the U.S. Geological Survey (USGS) Water Availability and Use Science Program to support investigations that characterize... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Illinois, Kentucky, LMG, Louisiana, All tags... Lower Mississippi Gulf Water Science Center, MAP, MRVA aquifer, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River Delta, Mississippi River Valley alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, U.S.Geological Survey, USGS, Water Availability and Use Science Program, aquifers, geoscientificInformation, ground water, groundwater, groundwater levels, inlandWaters, potentiometric surface, surface-water altitude, water table, Fewer tags Hydrogeologic Aquifer Test dataset, Lower Mississippi-Gulf Water Science Center, December 2020 Since the 1940's, commercial, academic and government hydrologists have used aquifer tests to estimate the hydrogeologic properties of an aquifer near test wells. Results from these tests are recorded in various files, databases, reports, and scientific publications. The U.S. Geological Survey (USGS), Lower Mississippi-Gulf Water Science Center (LMG) is aggregating all aquifer test results from Alabama, Arkansas, Louisiana, Mississippi, and Tennessee into a single dataset that is publicly available in a machine-readable format. This dataset contains information and results from 2,245 aquifer tests compiled for aquifers located in Arkansas, Louisiana, and Mississippi. Descriptive statistics for the December 2020... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Aquifer, Aquifer Test, Arkansas, Conductivity, Groundwater, All tags... Hydrogeology, Louisiana, Lower Mississippi-Gulf, Mississippi, Mississippi Alluvial Plain (MAP) Project, Permeability, Specific Capacity, Storage Coefficient, Transmissivity, USGS Science Data Catalog (SDC), Fewer tags OFR 2021-1008 MODEL OUTPUT: Soil-Water-Balance net infiltration and irrigation water use output datasets for the Mississippi Embayment Regional Aquifer System, 1915 to 2018 This data release includes four sets of gridded annual net infiltration (groundwater recharge) and irrigation water use data sets for the Mississippi Embayment Regional Aquifer System (MERAS).Also included are gridded water balance component data sets of precipitation, runoff, actual evapotranspiration, and soil-water storage for 2000 to 2018. The net infiltration, irrigation, runoff, actual evapotranspiration, and soil-water storage data sets are outputs from simulations done with the USGS Soil-Water-Balance (SWB) model (version 2; Westenbroek and others, 2018). The precipitation data was used as input for the SWB model application and is derived from DayMet version 3 (Thornton and others, 2018) and Livneh and... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Hydrology, Mississippi, Mississippi River Delta, Missouri, All tags... Tennessee, USGS Science Data Catalog (SDC), groundwater recharge, inlandWaters, irrigation water use, net infiltration, soil-water-balance model, usgssoilwaterbalancemodel, water cycle, Fewer tags Groundwater age categories based on tritium concentrations in samples collected from the Mississippi River Valley alluvial aquifer and aquifers of the Mississippi embayment principal aquifer system The Mississippi River Valley alluvial aquifer (MRVA) overlies and is bounded by several regional aquifers that make up the Mississippi embayment aquifer system (MEAS) in the central United States. The MRVA, which consists of Quaternary alluvium, is one of the most heavily pumped aquifers in the nation and is a major source of groundwater for irrigation. Large groundwater-level declines in portions of the aquifer have raised concerns about sustainable use of this important resource. An aquifer-scale assessment of groundwater-age categories based on tritium concentrations was completed to better understand groundwater availability and susceptibility. The presence of tritium, a radioactive isotope of hydrogen, in a... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas, Hydrology, Kentucky, Louisiana, Mississippi, All tags... Mississippi Alluvial Plain, Mississippi Embayment, Missouri, Tennessee, USGS Science Data Catalog (SDC), Water Quality, groundwater, groundwater age, groundwater quality, tritium, tritium analysis, Fewer tags Combined results and derivative products of hydrogeologic structure and properties from airborne electromagnetic surveys in the Mississippi Alluvial Plain (ver. 2.0, July 2024) Electrical resistivity results from four regional airborne electromagnetic (AEM) surveys (Burton et al. 2024, Hoogenboom et al. 2023, Minsley et al. 2021 and Burton et al. 2021) over the Mississippi Alluvial Plain (MAP) were combined by the U.S. Geological Survey to produce three-dimensional (3D) gridded models and derivative hydrogeologic products. These products were first published using data from the first two AEM regional surveys, labeled with the year “2020” (Minsley et al. 2021, Burton et al. 2021). The 3D resistivity models and select derivative products were later updated by incorporating additional data from the two subsequent AEM surveys, labeled with the year “2022” (Burton et al. 2024, Hoogenboom et... Categories: Data, Data Release - Revised; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: 3D, Arkansas, Arkansas River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Illinois, Louisiana, MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River, Mississippi River Valley Alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), WAUSP, Water Availability and Use Science Program, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, hydrogeology, resistivity, three-dimensional, water resources, Fewer tags Hydrogeologic Aquifer Test dataset, Lower Mississippi-Gulf Water Science Center, March 2022 Since the 1940's, commercial, academic and government hydrologists have used aquifer tests to estimate the hydrogeologic properties of an aquifer near test wells. Results from these tests are recorded in various files, databases, reports, and scientific publications. The U.S. Geological Survey (USGS), Lower Mississippi-Gulf Water Science Center (LMG) is aggregating all hydrogeologic aquifer test results from Alabama, Arkansas, Louisiana, Mississippi, and Tennessee into a single dataset that is publicly available in a machine-readable format. The hydrogeologic values presented in the Mar2022 edition of the LMG-Hydrogeologic Test Dataset were estimated by Douglas Carlson, PhD, with the Louisiana Geological Survey... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Aquifer, Aquifer Test, Conductivity, Groundwater, Hydrogeology, All tags... Louisiana, Mississippi Alluvial Plain (MAP) Project, Permeability, Specific Capacity, Storage Coefficient, Transmissivity, USGS Science Data Catalog (SDC), Fewer tags Waterborne Resistivity Inverted Models, Mississippi Alluvial Plain, 2016-2018 This data release consists of two .csv files of inverted models of electrical resistivity created from the processed resistivity data in the accompanying two data releases: (Miller and Others, 2018) and (2018 Raw and Processed, in progress). During 2016, 17, and 18, the U.S. Geological Survey conducted continuous resistivity profiling along 15 rivers or lakes in the Mississippi Alluvial Plain of Mississippi, Arkansas, Louisiana, and Missouri to characterize streambed hydraulic conductivity values. These techniques characterize the near surface geomorphology of the streambed that controls the recharge to the alluvial aquifer. These data can be used to map changes in the lithology of the streambed and identify areas... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Arkansas, Black River, Bogue Phalia, Cache River, Continuous Resistivity Profiling, All tags... Electrical Resistivity, Eutah Bend, Floodway, Geophysical Survey, Geophysics, Hydraulic Conductivity, Hydrogeology, Mississippi, Mississippi Alluvial Plain, Missouri, On Farm Storage, Quiver River, Roebuck Lake, Sky Lake, St. Francis River, Sunflower River, Tallahatchie River, USGS Science Data Catalog (SDC), White River, Yalobusha River, Yazoo River, inlandWaters, Fewer tags Waterborne resistivity surveys for streams and reservoirs in the Mississippi Alluvial Plain, 2016 and 2018 This data release has three components for each of the eight surveys that were conducted in 2018: 1) a geospatial dataset of the processed data; 2) tabular data of the processed waterborne resistivity profiling data and associated water-quality data; 3) tabular data of the raw waterborne resistivity data and associated water-quality data. In addition to the newly collected data from 2018, the waterborne resistivity data from 2016 (Miller and others, 2016) is included and has been re-processed to be consistent with the processing steps currently utilized and described herein. In fresh water aquifers, the geoelectric resistivity of earth materials commonly has a positive correlation with hydraulic conductivity (Faye... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Apparent resistivity, Arkansas, Black River, Cache River, Continuous resistivity profiling, All tags... Eutah Bend, Geophysics, Mississippi, Mississippi Alluvial Plain, Missouri, Quiver River, Reciprocal Schlumberger, Resistivity, Roebuck Lake, Sky Lake, Streambed hydraulic conductivity, Sunflower River, Tallahatchie River, USGS Science Data Catalog (SDC), Water Resources, White River, inlandWaters, Fewer tags Data associated with potentiometric surface, Mississippi River Valley alluvial aquifer, spring 2016 A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical Datum of 1988 (NAVD 88), using most of the available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time, after installation, but some wells were measured more than one time in a year and a small number of wells were measured continually. Streamgages were typically operated continuously. The potentiometric surface map for 2016 was created as part of the U.S. Geological Survey (USGS) Water Availability and Use Science Program to support investigations that characterize... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas, Hydrogeology, Illinois, Information Sciences, Kentucky, All tags... LMG, Louisiana, Lower Mississippi Gulf Water Science Center, MAP, MRVA aquifer, Mississippi, Mississippi Alluvial Plain, Mississippi Alluvial Plain, Mississippi River Delta, Mississippi River Valley alluvial aquifer, Missouri, Tennessee, U.S. Geological Survey, U.S.Geological Survey, USGS, USGS Science Data Catalog (SDC), Water Availability and Use Science Program, Water Resources, aquifers, geoscientificInformation, ground water, groundwater, groundwater altitude, groundwater levels, inlandWaters, potentiometric surface, surface-water altitude, water table, Fewer tags Machine-learning model predictions and rasters of groundwater salinity in the Mississippi Alluvial Plain Groundwater from the Mississippi River Valley alluvial aquifer (MRVA), coincident with the Mississippi Alluvial Plain (MAP), is a vital resource for agriculture and drinking-water supplies in the central United States. Water availability can be limited in some areas of the aquifer by high concentrations of salinity, measured as specific conductance. Boosted regression trees (BRT), a type of ensemble-tree machine-learning method, were used to predict specific conductance concentration at multiple depths throughout the MRVA and underlying aquifers. Two models were created to test the incorporation of datasets from a regional aerial electromagnetic (AEM) survey and evaluate model performance. Explanatory variables... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arkansas (AR), Illinois (IL), Kentucky (KY), Louisiana (LA), Mississippi (MS), All tags... Missouri (MO), Tennessee (TN), USGS Science Data Catalog (SDC), alluvial aquifer, aquifer, boosted regression trees, groundwater, groundwater quality, machine learning, mathematical modeling, water quailty, Fewer tags Waterborne resistivity surveys for streams in the Mississippi Alluvial Plain, 2017 This data release has three components for each of the eight stream lengths: 1) a geospatial dataset of the processed data; 2) tabular data of the processed waterborne resistivity profiling data and associated water-quality data; 3) tabular data of the raw waterborne resistivity data and associated water-quality data. In fresh water aquifers, the geoelectric resistivity of earth materials commonly has a positive correlation with hydraulic conductivity (Faye and Smith, 1994). Throughout 2017, continuous resistivity profiling data were collected, as a proxy for streambed hydraulic conductivity, along reaches of eight streams in the Mississippi Alluvial Plain of Mississippi, Arkansas, and Missouri. A total of... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Apparent resistivity, Arkansas, Black River, Bogue Phalia, Continuous resistivity profiling, All tags... Floodway, Geophysics, Geophysics, Hydrogeology, Mississippi, Mississippi Alluvial Plain, Missouri, Reciprocal Schlumberger, Resistivity, St. Francis River, Streambed hydraulic conductivity, Sunflower River, Tallahatchie River, USGS Science Data Catalog (SDC), Water Resources, Waterborne resistivity, Yalobusha River, Yazoo River, inlandWaters, Fewer tags