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On June 5, 2015, transient electromagnetic (TEM) data were acquired on the baseball field at the East Falmouth, Massachusetts Elementary School approximately 30 m north the well MA-FWS-750. Transient electromagnetic induction (TEM) surveys provide resistivity soundings of the subsurface, which can be related to lithology and hydrogeology. Electrical current is cycled through a wire placed on the land surface in a transmitter loop (Tx), which in turn produces a static magnetic field. When the current is abruptly terminated, an instantaneous current is induced in the earth, and it moves downward and outward as the induced current decays with time. The decay is controlled by the resistivity of the earth. One or more...
Tags: Borehole Logging,
East Falmouth,
Electromagnetic,
Groundwater,
Massachusetts, All tags...
Nantucket Sound,
Resistivity,
TEM,
Time Domain,
Transient Electromagnetic,
environment,
geoscientificInformation, Fewer tags
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Towed transient electromagnetic (tTEM) data were acquired along levees at select area near Vicksburg, Mississippi during March 2018. During the survey, 13.7 line-kilometers were collected in the focus area. Data were collected by members of the U.S. Geological Survey, Technology Development and Transfer Team, and the Aarhus University Hydrogeophysics Group. tTEM data acquired along the approximately 14 line-kilometers atop and along the toe of a levee near the banks of the Mississippi River in Warren County, Mississippi. Data were collected to characterize the subsurface resistivity structure of levees in support of a technical demonstration for the U.S. Army Corps of Engineers. tTEM data were collected using an...
Tags: Eagle Lake,
Levees,
Mississippi,
Mississippi River,
Vicksburg, All tags...
Warren County,
electromagnetic surveying,
electromagnetics,
engineering sciences,
environment,
geophysics,
geoscientificInformation,
groundwater,
groundwater,
hydrogeology,
magnetic field,
resistivity,
resistivity,
transient electromagnetics,
water resources,
water-borne, Fewer tags
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Towed transient electromagnetic (tTEM) data were acquired at two field locations near Shellmound, Mississippi during March 2018. During the survey, approximately 34.7 line-kilometers were collected in the study area. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and the Aarhus University Hydrogeophysics Group. tTEM data acquired along the approximately 35-line kilometers in two agricultural fields near the banks of the Tallahatchie River in Leflore County, Mississippi. Data were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi Alluvial Plain. tTEM data were collected using an...
Tags: Greenwood,
Leflore County,
MRVA,
Mississippi,
Mississippi Alluvial Plain, All tags...
Mississippi River Valley Alluvial aquifer,
Shellmound,
Sunflower County,
Tallahatchie River,
aeromagnetic surveying,
aeroradiometric surveying,
electromagnetic surveying,
electromagnetics,
engineering sciences,
environment,
geophysics,
geoscientificInformation,
geospatial datasets,
groundwater,
groundwater,
hydrogeology,
magnetic anomaly maps,
magnetic field,
resistivity,
resistivity,
transient electromagnetics,
water resources,
water-borne, Fewer tags
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In March 2016, the U.S. Geological Survey drilled a borehole, MA-FSW-750-0100, through the unconsolidated sediments and 1.5 m into the bedrock in East Falmouth, Massachusetts, to improve understanding of the glacial history and hydrologic properties of the Cape Cod aquifer. Prior to drilling, candidate sites were investigated using surface geophysical methods. Passive seismic horizontal-to-vertical spectral ratio (HVSR) methods were used to estimate the depth of the unconsolidated deposits over bedrock. Transient electromagnetic (TEM) surveys were conducted to characterize the lithology and salinity of formation water in the subsurface, which was used to plan the borehole completion. The specific conductance of...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Borehole Logging,
Conductivity,
East Falmouth,
Electromagnetic Induction (EMI),
Electromagnetic Surveying, All tags...
Gamma-Ray Logging,
Groundwater,
Horizontal to Vertical Spectral Ratio Seismic (HVSR),
Massachusetts,
Nantucket Sound,
Nuclear Magnetic Resonance (NMR),
Passive Seismic,
Resistivity,
Seismic Methods,
Time Domain,
Transient Electromagnetics (TEM),
USGS Science Data Catalog (SDC),
environment,
geoscientificInformation, Fewer tags
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