Filters: Tags: {"scheme":"USGS Thesaurus","name":"groundwater"} (X) > Types: OGC WMS Layer (X) > partyWithName: Geology, Geophysics, and Geochemistry Science Center (X) > Types: OGC WMS Service (X)

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Airborne electromagnetic, magnetic, and radiometric survey, upper East River and surrounding watersheds near Crested Butte, Colorado, 2017 This data release consists of 1,984 line-kilometers of airborne electromagnetic (AEM), magnetic data and radiometric data collected from October to November 2017 in the upper East River and surrounding watersheds in central Colorado. The U.S. Geological Survey contracted Geotech Ltd. to acquire these data as part of regional investigations into the geologic structure and hydrologic framework of the area. The AEM data have been inverted to produce a series of regional cross-sections that constrain the electrical properties of the subsurface to a depth of ~500m. Data were acquired using the VTEM ET time-domain helicopter-borne electromagnetic system along flight lines that cross important geological structures over... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Colorado, Crested Butte, East River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Gunnison County, Mineral Resources Program, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), aeromagnetic surveying, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater flow, hydrogeology, magnetics, near surface, radiometrics, resistivity, Fewer tags Airborne electromagnetic and magnetic survey data in Big Cypress National Preserve and Everglades National Park, 2001 Airborne electromagnetic (AEM) and magnetic survey data, a total of 3065 line-kilometers, were collected during October 2001 in two survey blocks and four repeated lines from an earlier survey. The largest area, Block 1 totaling 2692.2 line-kilometers was flown over Big Cypress Preserve, smaller Block 2 along 277.1 line-kilometers was flown near the town of Homestead, and four lines totaling 95.2 line-kilometers were flown over Everglades National Park. The lines over Everglades National Park repeated the path of four lines from an earlier AEM survey collected in December 1994 (released under USGS Open-File Report 02-101 downloadable at https://pubs.er.usgs.gov/publication/ofr02101). Electromagnetic data were acquired... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Big Cypress National Preserve, City of Homestead, Dade County, Everglades National Park, Florida Bay, All tags... Monroe County, South Florida, USGS Science Data Catalog (SDC), aeromagnetic surveying, aquifer, coastal aquifer, electromagnetic surveying, environment, freshwater/saltwater interface, geophysics, geoscientificInformation, geospatial datasets, groundwater, magnetic surveying, monitoring, resistivity, salinity, saltwater intrusion, water quality, Fewer tags Airborne electromagnetic and magnetic survey data, southeastern San Joaquin Valley near Cawelo, California, 2016: Processed AEM data Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 over a total distance of 262 line kilometers in the southeastern San Joaquin Valley near Cawelo, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Oil and Gas Regional Monitoring Program. Minimally processed binary AEM data received from SkyTEM ApS were imported into the Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark) and processed. Filters were applied to inclinometer and spatial positioning data to... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, Cawelo, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Kern County, Poso Creek, Poso Creek Oil Field, San Joaquin Valley, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Airborne electromagnetic and magnetic survey, western Hualapai Indian Reservation near Grand Canyon West and Peach Springs, Arizona, 2018 Airborne electromagnetic (AEM) and magnetic survey data were collected during March 2018 along 1,637 line line-kilometers over the western Hualapai Indian Reservation and surrounding areas. The survey was conducted as part of a study of the groundwater resources of the Truxton basin and Hualapai Plateau. The survey was designed to improve the understanding of the geometry of the major hydrostratigraphic contacts of the study area. Data were acquired by SkyTEM ApS with the SkyTEM 312 time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was flown at a nominal flight height of 30 meters (m) above terrain along block-style lines with a nominal spacing... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: AZWSC, Arizona, Arizona Water Science Center, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Geophysics, Grand Canyon, Grand Canyon West Airport, Hualapai Indian Reservation, Hualapai Plateau, Hurricane Fault, Hydrology, Mohave County, Music Mountains, Peach Springs, Structural Geology, Truxton, Truxton basin, USGS Science Data Catalog (SDC), Water Resources, aeromagnetic surveying, electromagnetic surveying, environment, geologic structure, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, resistivity, Fewer tags Processed AEM data Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 along 1,443 line kilometers in the southwestern San Joaquin Valley near Lost Hills, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Program of Regional Monitoring of Water Quality in Areas of Oil and Gas Production. Minimally processed binary AEM data received from the contractor were imported into the Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark) and processed. Filters were applied to inclinometer... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Lost Hills, Lost Hills Oil Field, North Belridge Oil Field, Northwest Lost Hills Oil Field, San Joaquin Valley, South Belridge Oil Field, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Hydrologic and geophysical data from high-elevation boreholes in Redwell Basin near Crested Butte, Colorado Four boreholes (MW1, MW1UZ, MW2, MW2.1) were drilled in the fall of 2017 and summer of 2018 in upper Redwell Basin, a headwater catchment underlain by hydrothermally altered sedimentary rock in the Elk Mountains near the town of Crested Butte, Colorado. The boreholes were continuously cored using a wireline HQ-sized coring system and sample a combination of Quaternary-aged surficial colluvium and the Cretaceous-aged Mesaverde Formation. In-situ injection-based hydraulic tests were performed in MW1 and MW2 during drilling while advancing using a single-packer apparatus in tandem with an in-line flow meter and interval pressure monitoring. Borehole geophysical logging was performed in MW1, MW1UZ, and MW2.1 in the... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Colorado, Crested Butte, Cretaceous, Elk Mountains, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Geophysics, Gunnison County, Gunsight Pass, Hydrology, Hydrology, Lawrence Berkeley National Laboratory, MRP, Mesaverde Formation, Metal transport in mineralized mountain watersheds, Mineral Resources, Mineral Resources, Mineral Resources Program, Mount Sopris Instruments, Quaternary, Redwell Basin, Rocky Mountain Biological Laboratory, Subsurface Biogeochemical Research Program, U.S. Geological Survey (USGS), USGS Science Data Catalog (SDC), University of Wyoming, borehole logging, core analysis, drilling and coring, environment, geoscientificInformation, groundwater, groundwater level, hydrogeology, permeability, porosity, Fewer tags Airborne electromagnetic and magnetic survey data, southeastern San Joaquin Valley near Cawelo, California, 2016 Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 over a total distance of 262 line kilometers in the southeastern San Joaquin Valley near Cawelo, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Oil and Gas Regional Monitoring Program. Data were acquired by SkyTEM ApS with the SkyTEM 312 time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was designed to cover the region hydrogeologically downgradient... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: CAWSC, California, California Water Science Center, Cawelo, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Kern County, Poso Creek, Poso Creek Oil Field, San Joaquin Valley, USGS Science Data Catalog (SDC), aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Airborne electromagnetic and magnetic survey data, southeastern San Joaquin Valley near Cawelo, California, 2016: Minimally processed data Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 along 262 line kilometers in the southeastern San Joaquin Valley near Cawelo, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Oil and Gas Regional Monitoring Program. Data were acquired by SkyTEM ApS with the SkyTEM 312 time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was flown at a nominal flight height of 35 m above terrain along block-style... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, Cawelo, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Kern County, Poso Creek, Poso Creek Oil Field, San Joaquin Valley, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Airborne electromagnetic and magnetic survey, southwestern San Joaquin Valley near Lost Hills, California, 2016 Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 along 1,443 line kilometers in the southwestern San Joaquin Valley near Lost Hills, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Program of Regional Monitoring of Water Quality in Areas of Oil and Gas Production. Data were acquired by SkyTEM ApS with the SkyTEM 312 time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was designed to cover the... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Geophysics, Hydrogeology, Kern County, Lost Hills, Lost Hills Oil Field, North Belridge Oil Field, Northwest Lost Hills Oil Field, San Joaquin Valley, South Belridge Oil Field, USGS Science Data Catalog (SDC), Water Quality, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Gravity Data Surface electrical resistivity tomography, magnetic, and gravity surveys were conducted in July 2017 in the greater East River Watershed near Crested Butte Colorado with a focused effort in Redwell Basin as part of a broader study of the role of bedrock groundwater in the hydrogeology of mineralized mountain watersheds. Ten gravity stations were acquired with a LaCoste and Romberg G-model relative gravimeter to map density variations. This data release includes principal facts for the gravity stations provided as digital data. Data fields are defined in the data dictionary. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Brush Creek, Colorado, Crested Butte, East River, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Gothic, Gunnison County, MRP, Mineral Resources Program, Mount Emmons, Oh-be-joyful, Redwell Basin, U.S. Geological Survey, USGS, bouguer anomaly, electrical resistivity tomography, electromagnetic surveying, electromagnetics, environment, free-air anomaly, geophysics, geoscientificInformation, geospatial datasets, gravimeter measurement, gravitational field (earth), gravity, groundwater, hydrogeology, magnetic anomaly maps, magnetic field, magnetic surveying, magnetics, nuclear magnetic resonance, resistivity, water resources, Fewer tags Inverted resistivity and IP models This data release consists of 1,984 line-kilometers of airborne electromagnetic (AEM), magnetic data and radiometric data collected from October to November 2017 in the upper East River and surrounding watersheds in central Colorado. The U.S. Geological Survey contracted Geotech Ltd. to acquire these data as part of regional investigations into the geologic structure and hydrologic framework of the area. The AEM data have been inverted to produce a series of regional cross-sections that constrain the electrical properties of the subsurface to a depth of ~500m. Data were acquired using the VTEM ET time-domain helicopter-borne electromagnetic system along flight lines that cross important geological structures over... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Colorado, Crested Butte, East River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Gunnison County, Mineral Resources Program, U.S. Geological Survey, USGS, aeromagnetic surveying, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater flow, hydrogeology, magnetics, near surface, radiometrics, resistivity, Fewer tags Ground-based transient electromagnetic data and resistivity models at selected sites of the California Central Coast and San Joaquin Valley 2019 Ground-based transient electromagnetic (TEM) data were acquired by the U.S. Geological Survey (USGS) at 16 locations of California’s southwestern San Joaquin Valley and Central Coast regions to define the electrical resistivity structure of hydrogeologic materials. Data were acquired using the ABEM WalkTEM system (Guideline Geo Ab, Sundbyberg, Sweden). TEM data were processed and numerically inverted to derive one-dimensional resistivity structure using SPIA (Aarhus Geosoftware, Aarhus, Denmark). The resulting models reveal vertical variations in electrical resistivity associated with geologic structure and zones of high salinity groundwater. This release includes raw and processed TEM data and a resistivity model... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, COGG, California, California Oil Gas and Groundwater, California Water Science Center, All tags... Cat Canyon Oil Field, Central Coast, Electromagnetic sounding, Elk Hills Oil Field, GGGSC, GPS measurement, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Kern County, Lost Hills Oil Field, Monterey County, San Ardo Oil Field, San Joaquin Valley, Santa Barbara County, TDEM, TEM, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Water Quality, Water Resources, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, resistivity, time-domain electromagnetic method, transient electromagnetic method, Fewer tags Inverted resistivity models Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 along 1,443 line kilometers in the southwestern San Joaquin Valley near Lost Hills, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Program of Regional Monitoring of Water Quality in Areas of Oil and Gas Production. Deterministic laterally constrained inversions of the processed airborne electromagnetic data were developed using the AarhusINV code implemented in Aarhus Workbench software. Inversion parameters were... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Kern County, Lost Hills, Lost Hills Oil Field, North Belridge Oil Field, Northwest Lost Hills Oil Field, San Joaquin Valley, South Belridge Oil Field, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Processed AEM data This data release consists of 1,984 line-kilometers of airborne electromagnetic (AEM), magnetic data and radiometric data collected from October to November 2017 in the upper East River and surrounding watersheds in central Colorado. The U.S. Geological Survey contracted Geotech Ltd. to acquire these data as part of regional investigations into the geologic structure and hydrologic framework of the area. The AEM data have been inverted to produce a series of regional cross-sections that constrain the electrical properties of the subsurface to a depth of ~500m. Data were acquired using the VTEM ET time-domain helicopter-borne electromagnetic system along flight lines that cross important geological structures over... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Colorado, Crested Butte, East River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Gunnison County, Mineral Resources Program, U.S. Geological Survey, USGS, aeromagnetic surveying, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater flow, hydrogeology, magnetics, near surface, radiometrics, resistivity, Fewer tags Minimally processed AEM and magnetic data Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 along 1,443 line kilometers in the southwestern San Joaquin Valley near Lost Hills, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Program of Regional Monitoring of Water Quality in Areas of Oil and Gas Production. Data were acquired by SkyTEM ApS with the SkyTEM 312 time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was flown at a nominal flight... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Lost Hills, Lost Hills Oil Field, North Belridge Oil Field, Northwest Lost Hills Oil Field, San Joaquin Valley, South Belridge Oil Field, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Airborne electromagnetic and magnetic survey data, southeastern San Joaquin Valley near Cawelo, California, 2016: Resistivity models Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2016 over a total of distance of 262 line kilometers in the southeastern San Joaquin Valley near Cawelo, California. These data were collected in support of groundwater salinity mapping and hydrogeologic framework development as part of the U.S. Geological Survey California Oil, Gas, and Groundwater program and the California State Water Resources Control Board’s Oil and Gas Regional Monitoring Program. Deterministic spatially constrained inversions of the processed AEM data were conducted using the AarhusINV code (Auken and others, 2014) implemented in Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark). Inversion... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CAWSC, California, California Water Science Center, Cawelo, GGGSC, All tags... Geology, Geophysics, and Geochemistry Science Center, Kern County, Poso Creek, Poso Creek Oil Field, San Joaquin Valley, aeromagnetic surveying, electromagnetic surveying, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater quality, hydrogeology, resistivity, salinity, Fewer tags Electrical Resistivity Tomography Data at Fort Irwin National Training Center, San Bernardino County, California, 2015 and 2017 The U.S. Army Fort Irwin National Training Center (NTC), approximately 35 mi north-northeast of Barstow, California, covers approximately 1,177 square miles, and is comprised of ten groundwater basins, three of which have been subdivided into subbasins on the basis of additional hydrologic testing. Since the early 1990s, the U.S. Geological Survey (USGS) has been studying water resources issues at Fort Irwin. One issue of concern is the potential effect of groundwater development resulting from planned training expansion and infrastructure at the NTC on natural springs and seeps, an important water source for wildlife. In 2010, the USGS entered into cooperative agreements with the U.S. Army to complete studies of... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Bicycle Lake, CAWSC, California, California Water Science Center, Electrical Resistivity Tomography, All tags... Fort Irwin, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrogeology, Mojave, Mojave Desert, San Bernardino County, USGS Science Data Catalog (SDC), desert ecosystems, environment, geophysics, geoscientificInformation, groundwater, hydrologic processes, lakebed characteristics, resistivity, water resources, Fewer tags Airborne electromagnetic and magnetic survey data and inverted resistivity models, Cedar Rapids, Iowa, May 2017 Airborne electromagnetic (AEM) and magnetic survey data were collected by CGG Canada Services Ltd. in collaboration with the USGS for the City of Cedar Rapids in a 53-square-kilometer area of the Cedar River Basin to the west of Cedar Rapids, Iowa. The survey was flown between May 4 and May 5, 2017 along 347 line kilometers. Electromagnetic data were acquired using RESOLVE frequency-domain helicopter-borne electromagnetic system. Magnetic data were collected with 1-Scintres Cesium Vapour (CS-3) magnetometer. Sensor elevation above ground was measured with Optech G-150 laser. The nominal elevation of the sensor was 30 m. This data release includes processed AEM and magnetic data and inverted resistivity depth sections. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Cedar River, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Hydrogeology, Iowa, All tags... Iowa Water Science Center, USGS Science Data Catalog (SDC), Water Resources, aeromagnetic surveying, aquifer, electromagnetic surveying, geology, geoscientificInformation, groundwater, resistivity, water quality, water resources, Fewer tags Minimally processed AEM, magnetic and radiometric data This data release consists of 1,984 line-kilometers of airborne electromagnetic (AEM), magnetic data and radiometric data collected from October to November 2017 in the upper East River and surrounding watersheds in central Colorado. The U.S. Geological Survey contracted Geotech Ltd. to acquire these data as part of regional investigations into the geologic structure and hydrologic framework of the area. The AEM data have been inverted to produce a series of regional cross-sections that constrain the electrical properties of the subsurface to a depth of ~500m. Data were acquired using the VTEM ET time-domain helicopter-borne electromagnetic system along flight lines that cross important geological structures over... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Colorado, Crested Butte, East River, GGGSC, Geology, Geophysics, and Geochemistry Science Center, All tags... Gunnison County, Mineral Resources Program, U.S. Geological Survey, USGS, aeromagnetic surveying, electromagnetic surveying, geophysics, geoscientificInformation, geospatial datasets, groundwater, groundwater flow, hydrogeology, magnetics, near surface, radiometrics, resistivity, Fewer tags