Hydrologist
Email:
cjohnson@usgs.gov
Office Phone:
860-487-7402
Fax:
860-487-8802
ORCID:
0000-0001-6941-1578
Location
11 Sherman Place
Unit 5015
Storrs
, CT
06269
US
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An irrigation monitoring experiment was performed in Haddam Meadows State Park, Connecticut, on July 16, 2019. Prior to this experiment, ground penetrating radar (GPR), frequency domain electromagnetics (FDEM), and electrical resistivity tomography (ERT) geophysical data were collected over a 20 meter by 10-meter grid to provide baseline information. A vertical soil moisture probe was installed in the center of this area that recorded volumetric water content, temperature, and electrical conductivity at 9 discrete depths down to 1 meter below land surface. Over the next 8 hours, 5,300 liters of irrigation water (with specific conductance of 1,000 microSiemens per centimeter) was sprayed as evenly as practical over...
Tags: Ambient Monitoring,
Connecticut,
Geophysics,
Geophysics,
Geophysics, All tags...
Haddam Meadows,
Hydrology,
Real-time Monitoring,
Soil Sciences,
Stratigraphy,
Surface Geophysics,
Surface Geophysics,
USGS Science Data Catalog (SDC),
USGS:626b151cd34e76103cd18517,
Water Resources,
Water Resources,
boundaries,
electromagnetic surveying,
electromagnetic surveying,
environment,
geophysics,
geophysics,
geoscientificInformation,
geoscientificInformation,
groundwater,
hydrogeology, Fewer tags
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Passive seismic data collection was done northwest of the Air Force Research Laboratory (AFRL) at Edwards Air Force Base using the horizontal-to-vertical spectral ratio (HVSR) technique. HVSR surveys were done at 43 locations between May and September 2018 to refine the understanding of the bedrock-alluvial aquifer transition zone downgradient from the AFRL. Specifically, the data were collected to help determine the depth to bedrock. The HVSR method is a passive seismic technique that uses a three-component seismometer to measure the vertical and horizontal components of ambient seismic noise. Seismic noise in the range of ~0.1 to 1 Hertz (Hz) is caused by ocean waves, large regional storms, and tectonic sources....
Categories: Data;
Tags: Antelope-Fremont Valleys,
Boron,
California,
Edwards Air Force Base,
Kern County, All tags...
Leuhman Ridge,
Mojave Desert,
North Edwards,
electrical resistivity imaging,
environment,
geophysics,
geophysics,
geoscientificInformation,
measurement,
seismic methods, Fewer tags
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This dataset contains field measurements of lakebed groundwater temperatures collected during three surveys in July 2008, August 2014, and August 2015, by using a handheld thermocouple probe and GPS at a permeable reactive barrier at Ashumet Pond, Falmouth, MA. The comma-separated file includes unique site identifiers, locations of measurement points, temperatures, dates, and types of measurement (groundwater, surface water, or control). Also included are ESRI raster datasets for each measurement date for (1) interpolated lakebed groundwater temperatures, and (2) interpolated lakebed groundwater temperatures normalized to the surface water temperature at the time of measurement. This data release is provided...
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The Air Force Research Laboratory (AFRL) is about 7 kilometers southwest of Boron, California, and covers 320 square kilometers of Edwards Air Force Base. The AFRL consists of 12 facilities for testing full-size rocket engines, engine components, and liquid and solid propellants. The historical release of contaminants from rocket test stands, evaporation ponds, burn pits, catch basins, and leaking waste-collection tanks has contaminated groundwater in the AFRL. Groundwater aquifers near the AFRL are mostly restricted to fractured granitic bedrock, but previous studies indicate that groundwater and associated contaminants have moved into alluvium to the north and northwest. The U.S. Geological Survey (USGS) and the...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Antelope-Fremont Valleys,
Boron,
California,
California Water Science Center,
Edwards Air Force Base, All tags...
Electrical Resistivity Tomography,
Environmental Health,
Geochemistry,
Geomorphology,
Geophysics,
Hydrogeology,
Kern County,
Leuhman Ridge,
Mojave Desert,
North Edwards,
Remote Sensing,
Seismology,
Soil Sciences,
Structural Geology,
USGS Science Data Catalog (SDC),
Water Quality,
Water Resources,
bedrock geologic units,
electromagnetic surveying,
environment,
geophysics,
geoscientificInformation,
groundwater,
hydrologic processes,
seismic methods,
water resources, Fewer tags
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Time-domain electromagnetic (TEM) surveys were done northwest of the Air Force Research Laboratory (AFRL) at Edwards Air Force Base. TEM surveys were done at 33 locations between May and October 2018 to refine the understanding of the bedrock-alluvial aquifer transition zone downgradient from the AFRL. TEM surveys (also called transient electromagnetic surveys) provide 1D resistivity soundings of the subsurface, which can be related to lithology and hydrogeology. In the TEM method, electrical current is cycled through a transmitter loop (Tx) wire, which in turn produces a primary magnetic field. When the current is abruptly terminated, a secondary magnetic field is induced in the earth, and it moves downward and...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service,
Shapefile;
Tags: Antelope-Fremont Valleys,
Boron,
California,
Edwards Air Force Base,
Kern County, All tags...
Leuhman Ridge,
Mojave Desert,
North Edwards,
electrical resistivity tomography,
environment,
geophysics,
geophysics,
geoscientificInformation,
measurement,
time domain electromagnetic,
transient electromagnetic, Fewer tags
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