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Evaluation and modification of the Pullman-Moscow ground-water flow model; Research Technical Completion Report Item Info

This work is a continuation and expansion of the numerical model described in Lum et al. (1990). A ground-water flow model was cooperatively developed by the U.S. Geological Survey and the University of Idaho in the 1980's to predict the impact of future ground-water withdrawals on aquifer water levels in the Pullman-Moscow area. This three-dimensional model was transferred from the University of Idaho mainframe computer to personal computer compatible files. These original file are retained for time-averaged, history-match and predictive simulations. The Pullman-Moscow ground-water flow model includes several assumptions which are difficult to support with the current level of information. Probably the greatest concern is the uncertainty of recharge and discharge to the deepest model layer in the Grand Ronde basalt. Most recharge to and discharge from this layer can not be directly measured. Evidence suggests, however, that discharge along the Snake River canyon has been overestimated. Over-estimation of this discharge would have adversely affected model calibration. A five-layer revision of the model was developed that subdivided the aquifer in the Grande Ronde basalt into three layers. The revised model was not re-calibrated due to inadequate information on aquifer water levels and characteristics.

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Title:
Evaluation and modification of the Pullman-Moscow ground-water flow model; Research Technical Completion Report
Authors:
Johnson, Gary S.; Bloomsburg, George; Ralston, Dale R.
Date Created (ISO Standard):
1996-01
Description:
This work is a continuation and expansion of the numerical model described in Lum et al. (1990). A ground-water flow model was cooperatively developed by the U.S. Geological Survey and the University of Idaho in the 1980's to predict the impact of future ground-water withdrawals on aquifer water levels in the Pullman-Moscow area. This three-dimensional model was transferred from the University of Idaho mainframe computer to personal computer compatible files. These original file are retained for time-averaged, history-match and predictive simulations. The Pullman-Moscow ground-water flow model includes several assumptions which are difficult to support with the current level of information. Probably the greatest concern is the uncertainty of recharge and discharge to the deepest model layer in the Grand Ronde basalt. Most recharge to and discharge from this layer can not be directly measured. Evidence suggests, however, that discharge along the Snake River canyon has been overestimated. Over-estimation of this discharge would have adversely affected model calibration. A five-layer revision of the model was developed that subdivided the aquifer in the Grande Ronde basalt into three layers. The revised model was not re-calibrated due to inadequate information on aquifer water levels and characteristics.
Subjects:
Groundwater flow hydraulic models groundwater discharge
Location:
Moscow
Latitude:
46.73
Longitude:
-117.02
Collection:
IWRRI
IWRRI number:
199605
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Source
Preferred Citation:
"Evaluation and modification of the Pullman-Moscow ground-water flow model; Research Technical Completion Report", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-199605.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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