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Updated Steady State USGS MODFLOW Juab Valley UT


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Created: Oct 26, 2017 at 5:34 p.m.
Last updated: Oct 26, 2017 at 6:39 p.m.
DOI: 10.4211/hs.397b353baf384cc99777e06c6a2a3215
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Content types: Model Instance Content 
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Abstract

Steady State and Transient models of Juab Valley converted to MODFLOW 2000 models.
<a href="https://pubs.er.usgs.gov/publication/70179114" rel="nofollow">https://pubs.er.usgs.gov/publication/70179114</a>

Plans to import water to Juab Valley, Utah, primarily for irrigation, are part of the Central Utah Project. A better understanding of the hydrology of the valley is needed to help manage the water resources and to develop conjunctive-use plans.

The saturated unconsolidated basin-fill deposits form the ground-water system in Juab Valley. Recharge is by seepage from streams, unconsumed irrigation water, and distribution systems; infiltration of precipitation; and subsurface inflow from consolidated rocks that surround the valley. Discharge is by wells, springs, seeps, evapotranspiration, and subsurface outflow to consolidated rocks. Ground-water pumpage is used to supplement surface water for irrigation in most of the valley and has altered the direction of groundwater flow from that of pre-ground-water development time in areas near and in Nephi and Levan.

Greater-than-average precipitation during 1980-87 corresponds with a rise in water levels measured in most wells in the valley and the highest water level measured in some wells. Less-than average precipitation during 1988-91 corresponds with a decline in water levels measured during 1988-93 in most wells. Geochemical analyses indicate that the sources of dissolved ions in water sampled from the southern part of the valley are the Arapien Shale, evaporite deposits that occur in the unconsolidated basin-fill deposits, and possibly residual sea water that has undergone evaporation in unconsolidated basin-fill deposits in selected areas. Water discharging from a spring at Burriston Ponds is a mixture of about 70 percent ground water from a hypothesized flow path that extends downgradient from where Salt Creek enters Juab Valley and 30 percent from a hypothesized flow path from the base of the southern Wasatch Range.

The ground-water system of Juab Valley was simulated by using the U.S. Geological Survey modular, three-dimensional, finite-difference, ground-water flow model. The numerical model was calibrated to simulate the steady-state conditions of 1949, multi-year transient-state conditions during 1949-92, and seasonal transient-state conditions during 1992-94. Calibration parameters were adjusted until model-computed water levels reasonably matched measured water levels. Parameters important to the calibration process include horizontal hydraulic conductivity, transmissivity, and the spatial distribution and amount of recharge from subsurface inflow and seepage from ephemeral streams to the east side of Juab Valley.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
North Latitude
40.0192°
East Longitude
-111.6815°
South Latitude
39.3470°
West Longitude
-112.1924°

Temporal

Start Date:
End Date:

Content

Additional Metadata

Name Value
MIGRATED_FROM MODFLOW Instance Resource

Related Resources

The content of this resource is derived from https://pubs.er.usgs.gov/publication/70179114

Credits

Contributors

People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Paul C. Inkenbrandt Utah Geological Survey UT, US 4358812816

How to Cite

Thiros, S. A. (2017). Updated Steady State USGS MODFLOW Juab Valley UT, HydroShare, https://doi.org/10.4211/hs.397b353baf384cc99777e06c6a2a3215

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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