Dataset Identification:
Resource Abstract:
- description: The U.S. Geological Survey and its partners have collaborated to complete airborne geophysical surveys for areas
of the North and South Platte River valleys and Lodgepole Creek in western Nebraska. The objective of the surveys was to map
the aquifers and bedrock topography of selected areas to help improve the understanding of groundwater-surface-water relationships
to be used in water management decisions. Frequency-domain (2008 and 2009) and time-domain (2010) helicopter electromagnetic
surveys were completed, using a unique survey flight line design, to collect resistivity data that can be related to lithologic
information for refinement of groundwater model inputs. To make the geophysical data useful for multidimensional groundwater
models, numerical inversion is necessary to convert the measured data into a depth-dependent subsurface resistivity model.
This inversion model, in conjunction with sensitivity analysis, geological ground truth (boreholes), and geological interpretation,
is used to characterize hydrogeologic features. The two- and three- dimensional interpretation provides the groundwater modeler
with a high-resolution hydrogeologic framework and a quantitative estimate of framework uncertainty. This method of creating
hydrogeologic frameworks improved the understanding of the actual flow path orientation by redefining the location of the
paleochannels and associated bedrock highs. The improved models represent the hydrogeology at a level of accuracy not achievable
using previous data sets.; abstract: The U.S. Geological Survey and its partners have collaborated to complete airborne geophysical
surveys for areas of the North and South Platte River valleys and Lodgepole Creek in western Nebraska. The objective of the
surveys was to map the aquifers and bedrock topography of selected areas to help improve the understanding of groundwater-surface-water
relationships to be used in water management decisions. Frequency-domain (2008 and 2009) and time-domain (2010) helicopter
electromagnetic surveys were completed, using a unique survey flight line design, to collect resistivity data that can be
related to lithologic information for refinement of groundwater model inputs. To make the geophysical data useful for multidimensional
groundwater models, numerical inversion is necessary to convert the measured data into a depth-dependent subsurface resistivity
model. This inversion model, in conjunction with sensitivity analysis, geological ground truth (boreholes), and geological
interpretation, is used to characterize hydrogeologic features. The two- and three- dimensional interpretation provides the
groundwater modeler with a high-resolution hydrogeologic framework and a quantitative estimate of framework uncertainty. This
method of creating hydrogeologic frameworks improved the understanding of the actual flow path orientation by redefining the
location of the paleochannels and associated bedrock highs. The improved models represent the hydrogeology at a level of accuracy
not achievable using previous data sets.
Citation
- Title Base of principal aquifer boundary for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts,
western Nebraska.
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- creation Date
2018-06-08T02:58:39.387569
Resource language:
Processing environment:
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Metadata data stamp:
2018-08-06T19:49:26Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T19:49:26Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
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- Contact information
-
-
- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:1abe901b-1666-47a0-871a-afab9dfa4950
Metadata record format is ISO19139 XML (MD_Metadata)