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<br />. <br /> <br />. <br /> <br />", <br /> <br />; <br /> <br />F. PROBLEM: <br /> <br />The Denver Basin aquifers are Colorado's largest source of ground water used for dc,mestic and pl,blic supply. <br />The deep and shallow parts of these aquifers are extensively used near the Denver metropolitan a:'ea, but orily <br />the shallow parts of the aquifers are used in the more outlying rural areas. In a 2,000 square-mile area in the <br />central part of the Denver Basin, few deep water wells exist and almost no information is availabl e to define <br />the water-yielding character of the deeper aquifers (the Denver, Arapahoe, and Laramie-Fox Hill: aquifers). <br />Important decisions about the economic life of the Denver Basin aquifers, and manHgement of thl: area's vital <br />ground-water resources are being made using ground-water models that are of uncertain validity because of <br />lack of data about the water-yielding character of these deeper aquifers near the center of the basi n, <br /> <br />G, OBJECTIVES: <br /> <br />The general objective is to use the Kiowa core to maximum advantage in defining the hydraulic characteristics <br />of the Denver Basin aquifers in this area of sparce data. Specific tasks include: <br /> <br />TASK 1, Define the transmissivity, lateral hydraulic conductivity, porosity, spc:citic yield, ar d specific <br />retention of the principal water-yielding materials in the aquifers, and define the vertical hydraulic conductivity <br />of the principal confining layers. <br /> <br />TASK 2, Expand the knowledge of the thiekness and lithology of the Basin aquifers by ider tification of <br />the aquifer geometries and lithologic characterization of the core hole. <br /> <br />TASK 3, Determine the ground-water quality of one of the deeper aquifers by sampling the completed <br />well. <br /> <br />TASK 4. Enhance public understanding of the ground,water resources of the l.ea by public irion of <br />geohydrologic results and by aiding Denver Museum of Natural History in preparation of public jisplays. <br /> <br />H. APPROACH: <br /> <br />TASK 1 will be accomplished by laboratory analyses of about SO selected core samples to d:termine <br />lateral and vertical hydraulic conductivity, porosity, and specific yield. Transmissivity will be est imaled for <br />permeable intervals using lateral hydraulic conductivity data and interval thickness determined f1 om <br />. geophysical logs. Specific retention will be calculated as the difference between !l')rosity and specific yield. <br />Laboratory analyses will be conducted by Dr. William Sanford at Colorado State University in Fort Collins, <br />Co. Bulk transmissivity of an aquifer will be determined by means of an aquifer test run on the co mpleted well <br /> <br />2 <br />