Filters: Tags: transient electromagnetics (X)
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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...
Surface and water-borne geophysical methods can provide information for the characterization of the subsurface structure of the earth for aquifer investigations. Floating and towed transient electromagnetic (FloaTEM and tTEM) surveys provide resistivity soundings of the subsurface, which can be related to lithology and hydrogeology. In the TEM method, a primary electrical current is cycled through a wire in a transmitter loop (Tx), which in turn produces a static primary magnetic field. When the current in the TX loop is abruptly terminated, secondary electrical currents are induced in the earth that move downward and outward decaying with time. The decay of the secondary electrical field is controlled by the subsurface...
Water-borne towed transient electromagnetic method, commonly referred to as FloaTEM, was acquired along a single survey track on the Ouachita River during October 2018. During the survey, 39.75 line-kilometers were collected near Blankston, Louisiana study area. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and Lower-Mississippi Gulf Science Center and the Aarhus University Hydrogeophysics Group. FloaTEM data acquired along the approximately 40 line kilometers of the Ouachita River in Caldwell County, in Louisiana,were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi Alluvial...
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...
Water-borne towed transient electromagnetic method, commonly referred to as FloaTEM, was acquired along a single survey track on the Ouachita River during October 2018. During the survey, approximately 46.15 line-kilometers were collected near Monroe, Louisiana study area. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and Lower-Mississippi Gulf Science Center and the Aarhus University Hydrogeophysics Group. FloaTEM data acquired along the approximately 46.1 line kilometers of the Ouachita River in Ouachita Parish, in Louisiana,were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi...
Water-borne towed transient electromagnetic method, commonly referred to as FloaTEM, was acquired along a single survey track on the Ouachita River during October 2018. During the survey, approximately 15.85 line-kilometers were collected near Monroe, Louisiana study area. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and Lower-Mississippi Gulf Science Center and the Aarhus University Hydrogeophysics Group. FloaTEM data acquired along the approximately 15.9 line kilometers of the Eutah Bend in Ouachita Parish, in Louisiana,were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi...
Water-borne towed transient electromagnetic method, commonly referred to as FloaTEM, was acquired along a single survey track on the Big Sunflower River during October 2018. During the survey, approximately 8.89 line-kilometers were collected in Sunflower County near Indianola, Mississippi. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and Lower-Mississippi Gulf Science Center and the Aarhus University Hydrogeophysics Group. FloaTEM data acquired along the approximately 8.9 line kilometers were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi Alluvial Plain. FloaTEM data were...
Water-borne towed transient electromagnetic method, commonly referred to as FloaTEM, was acquired along a single survey track on the Ouachita River during October 2018. During the survey, 56.35 line-kilometers were collected near Columbia, Louisiana study area. Data were collected by members of the U.S. Geological Survey, Hydrogeophysics Branch, and Lower-Mississippi Gulf Science Center and the Aarhus University Hydrogeophysics Group. FloaTEM data acquired along the approximately 56.4 line kilometers of the Ouachita River in Caldwell Parish, in Louisiana,were collected to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation of the Mississippi Alluvial...
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