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<br />PROJECT TITLE: <br /> <br />Regional Aquifer System Analysis <br />of the Upper Colorado River Basin <br />in Colorado <br /> <br /> <br />PROJECT NUMBER: <br /> <br />CO-81-158 <br /> <br />STUDY LOCATION: <br /> <br />The Upper Colorado River Basin <br />in western Colorado <br /> <br />COOPERATING AGENCY: <br /> <br />None--U.S. Geological Survey funds only <br /> <br />PROJECT CHIEF AND <br />OFFICE: <br /> <br />O. James Taylor, District Office, Lakewood <br /> <br />PROJECT DURATION: <br /> <br />July 1981 to September 1987 <br /> <br />PROBLEM: Water demands are increasing in the Upper Colorado River Basin. <br />Ground-water reservoirs may contain large supplies, but not all have been <br />i nves t i gated. Effect i ve water management cannot proceed until quantity <br />and quality of available water supplies have been appraised. <br /> <br />OBJECTIVES: Locate major aquifer systems, estimate the vol ume of ground <br />water in storage, determine the quality of available ground water, and <br />estimate the hydrologic impacts of major withdrawals and injection. <br /> <br />APPROACH: Compile hydrologic and geochemical data from existing well logs <br />and onsite inventory of wells and springs. Prepare and use simulation <br />models to estimate the effects of withdrawals from, and injection into, <br />various aquifer systems. <br /> <br />PROGRESS: Most analytical work and report writing was completed on this proj- <br />ect. A hydrologic atlas and journal article were published. A water- <br />supply paper and WRI report were approved for publication. Completed and <br />ready for review are one professional paper, one hydrologic atlas, and <br />three WRI reports. <br /> <br />PLANS FOR FY 87: All reports will be completed, and project will be <br />terminated. <br /> <br />15 <br />