Base of principal aquifer boundary for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska
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.
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "Chris Hobza",
"@type": "vcard:Contact",
"hasEmail": "mailto:cmhobza@usgs.gov"
}
|
| 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. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/P9MIC9HU",
"mediaType": "application/http",
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{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.0ede1aeb-cee7-4b27-b5e1-979b1989650d.xml"
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]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_0ede1aeb-cee7-4b27-b5e1-979b1989650d |
| keyword |
[
"Nebraska",
"Ogallala",
"Scottsbluff",
"Sidney",
"USGS:0ede1aeb-cee7-4b27-b5e1-979b1989650d",
"environment",
"geoscientificInformation",
"inlandWaters",
"principal aquifer boundary"
]
|
| modified | 2020-11-17T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -104.2, 41.0, -102.5, 41.44 |
| theme |
[
"Geospatial"
]
|
| title | Base of principal aquifer boundary for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska |
