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Hydrogeology and a mathematical model of ground-water flow in the Pullman-Moscow region, Washington and Idaho Item Info
- Title:
- Hydrogeology and a mathematical model of ground-water flow in the Pullman-Moscow region, Washington and Idaho
- Authors:
- Smoot, John Leach; Ralston, Dale R.
- Date Created (ISO Standard):
- 1987-04
- Description:
- Increasing pumpage rates and declining ground-water levels in the Columbia River Basalts of the Pullman-Moscow area of Washington and Idaho indicate a need for ground-water management. A three-dimensional numerical computer model of ground-water flow is constructed to guide this management. Basalt aquifer thicknesses of 0 to 3500 feet are determined by a magnetotelluric geophysical survey in support of the study. The model incorporates a Grande Ronde Basalt layer, a Wanapum Basalt layer, and an overlying surficial loess layer. A recharge rate of 139 cubic feet per second to the upper layer of the ground-water flow model is calculated using a recharge model developed by the U.S. Geological Survey. Ground-water discharge is modeled as stream inflow and seepage where a layer is incised by a river. Cross-sectional models distributed across the domain of the three-dimensional model along flow lines provide an efficient means of obtaining hydraulic coefficient input for the three-dimensional model. The three-dimensional model is calibrated using the time-average method and evaluated through a history match procedure. The model incorporates numerous assumptions and simplifications; model predictions therefore are indicative only of general trends for the future. The model suggests that it is possible for ground-water levels to stabilize if ground-water pumpage stabilizes at a constant level. Ground-water level declines will continue into the foreseeable future as long as ground-water pumpage continues to increase.
- Subjects:
- geohydrology groundwater flow mathematical models
- Location:
- Moscow
- Latitude:
- 46.73
- Longitude:
- -116.99
- Collection:
- Palouse Basin
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
- Publisher:
- Idaho Water Resources Research Institute
- Contributing Institution:
- University of Idaho
- Type:
- Text
- Format:
- application/pdf
- Cataloger:
- wbv
- Date Digitized:
- 2012
Source
- Preferred Citation:
- "Hydrogeology and a mathematical model of ground-water flow in the Pullman-Moscow region, Washington and Idaho", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-1987_smoot_et_hydrogeology_mathematical.html
Rights
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/