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OREGON WATER SCIENCE CENTER |
Deschutes Basin Ground-Water Study |
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The study was conducted in two phases: Phase I included the characterization of the hydrogeologic framework using surface geologic maps and lithologic data from wells. This phase also included estimation of the rates and distribution of recharge to the aquifer system from precipitation (using a mass-balance approach), canal leakage, and deep percolation of irrigation water applied to fields. Discharge from the aquifer system to streams was estimated using streamflow records and gain-loss measurements. Discharge to wells was estimated using pumping records, analysis of satellite imagery (for identification of crop areas and types), and water-right information. Water-level elevation maps were created using water levels measured in wells precisely located in the field. The last part of phase I consisted of construction and calibration of a steady-state numerical flow model. Phase II of the study involved construction and calibration of a transient ground-water flow model. The models can be used to test various future ground-water development scenarios and canal lining scenarios, particularly with regard to their effects on regional ground-water levels and streamflow.Go back to site navigation barGo to external links
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