Modeling an Alluvial Aquifer with Flood Irrigationby Victor R. Hasfurther, (M.ASCE), Univ of Wyoming, Laramie, WY, USA,
Hilaire W. Peck, Univ of Wyoming, Laramie, WY, USA,
Steve A. Mizell, Univ of Wyoming, Laramie, WY, USA,
Abstract: Interaction between an unconfined alluvial aquifer, recharged by flood irrigation, and the associated stream system in a glacial outwash area of Wyoming was studied. The United States Geological Survey model entitled, 'A Modular Three-Dimensional Finite-Difference Ground-Water Flow Model,' was chosen as the model best suited for simulating the stream-aquifer system. The methodology used for calibrating the USGS model and the methodology used in performing a sensitivity analysis on selected model parameters are based on a comparison to actual data collected on a 30 square mile area. Results obtained from the operation of the model were return flows to the stream, change in storage of the aquifer, and groundwater inflow minus groundwater outflow to the aquifer.
Subject Headings: Hydrologic models | Aquifers | Irrigation | Three-dimensional models | Three-dimensional flow | Groundwater flow | Alluvial channels | Floods | Porous media flow | Streamflow | Return flow | North America | United States | Wyoming
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