Dataset Identification:
Resource Abstract:
- description: In 2006, a cooperative study was established to compile reliable data describing groundwater and surface-water
interactions in the Elkhorn and Loup River Basins. The purpose of the study was to address state legislation that requires
a sustainable balance between long term water supplies and uses of surface water and groundwater. A groundwater-flow model
[hereinafter referred to as the Elkhorn-Loup Model (ELM)] was constructed as part of the first two phases of that study as
a tool for understanding the effect of groundwater pumpage on stream base flow and the effects of management strategies on
hydrologically connected groundwater and surface-water supplies. The third phase of the study was implemented to gain additional
geologic knowledge and update the ELM with enhanced water-budget information and refined discretization of the model grid
and stress periods. As part of that effort, the ELM is being reconstructed to include two vertical model layers, whereas phase-one
and phase-two simulations (Peterson and others, 2008; Stanton and others, 2010) represented the aquifer system using one vertical
model layer. The goal for defining the base of the upper model layer was to divide the model vertically so that the upper
layer had different water transmitting and storage characteristics than the lower layer. Texture descriptions were used in
most cases to identify the depth in a test-hole, water well, or surface-geophysical log at which dividing the aquifer produced
contrasting texture characteristics for the upper and lower model layers. The study area covers approximately 30,000 square
miles, and extends from the Niobrara River in the north to the Platte River in the south. The western boundary roughly coincides
with the western boundary of the Upper Loup NRD, and the eastern boundary roughly coincides with the approximate location
of the westernmost extent of glacial till in eastern Nebraska (University of Nebraska, 2005). This data release consists of
a line shapefile of contours attributed with values representing the elevation of the base of the upper layer of the two-layer
phase-three ELM above the vertical datum (National Geodetic Vertical Datum of 1929).; abstract: In 2006, a cooperative study
was established to compile reliable data describing groundwater and surface-water interactions in the Elkhorn and Loup River
Basins. The purpose of the study was to address state legislation that requires a sustainable balance between long term water
supplies and uses of surface water and groundwater. A groundwater-flow model [hereinafter referred to as the Elkhorn-Loup
Model (ELM)] was constructed as part of the first two phases of that study as a tool for understanding the effect of groundwater
pumpage on stream base flow and the effects of management strategies on hydrologically connected groundwater and surface-water
supplies. The third phase of the study was implemented to gain additional geologic knowledge and update the ELM with enhanced
water-budget information and refined discretization of the model grid and stress periods. As part of that effort, the ELM
is being reconstructed to include two vertical model layers, whereas phase-one and phase-two simulations (Peterson and others,
2008; Stanton and others, 2010) represented the aquifer system using one vertical model layer. The goal for defining the base
of the upper model layer was to divide the model vertically so that the upper layer had different water transmitting and storage
characteristics than the lower layer. Texture descriptions were used in most cases to identify the depth in a test-hole, water
well, or surface-geophysical log at which dividing the aquifer produced contrasting texture characteristics for the upper
and lower model layers. The study area covers approximately 30,000 square miles, and extends from the Niobrara River in the
north to the Platte River in the south. The western boundary roughly coincides with the western boundary of the Upper Loup
NRD, and the eastern boundary roughly coincides with the approximate location of the westernmost extent of glacial till in
eastern Nebraska (University of Nebraska, 2005). This data release consists of a line shapefile of contours attributed with
values representing the elevation of the base of the upper layer of the two-layer phase-three ELM above the vertical datum
(National Geodetic Vertical Datum of 1929).
Citation
- Title Digital map of the elevation of base of the upper layer of the phase-three Elkhorn-Loup Model, north-central Nebraska.
-
- creation Date
2018-05-20T02:34:14.020100
Resource language:
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Metadata data stamp:
2018-08-06T19:58:43Z
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 2018-08-06T19:58:43Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- 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:25155e47-4315-4030-9fe6-34d01f00b650
Metadata record format is ISO19139 XML (MD_Metadata)