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Updated Steady State USGS MODFLOW Juab Valley UT

Authors: Susan A. Thiros
Owners: Paul Inkenbrandt
DOI:10.4211/hs.397b353baf384cc99777e06c6a2a3215 How to Cite
Resource type:MODFLOW Model Instance Resource
Created:Oct 26, 2017 at 5:34 p.m.
Last updated: Oct 27, 2017 at midnight by Paul Inkenbrandt


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


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.


Sharing status:

  • Published Resource  Published



 Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
 Coordinate Units:  Decimal degrees
North Latitude
East Longitude
South Latitude
West Longitude


 Start Date:
 End Date:


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The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Susan A. Thiros U.S. Geological Survey


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
Model Output
Includes output files? No

Executed By
Name MODFLOW-2000
Version MODFLOW-2000 Version 1.19.01
Resource URI

Study Area

Grid Dimensions
Number of layers 4
Type of rows Regular
Number of rows 31
Type of columns Regular
Number of columns 157

Stress Period
Type Steady

Groundwater Flow
Flow package BCF6
Flow parameter Hydraulic Conductivity

Boundary Condition
Specified head boundary package(s) CHD
Specified flux boundary package(s) RCH, WEL
Head-dependent flux boundary package(s) DRN, EVT, STR

Model solver PCG
Output control package OC


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