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<br />oc 1 G ~) <br /> <br />prioritized in the same manner as the information needs; study elements designed to provide <br />information considered necessary to improve the quantification of the system are prioritized as <br />essential, and those designed to provide information that would add additional understanding <br />of the system, but would not be necessary to improve the quantification of the system, are <br />prioritized as useful. Several study elements are of an experimental nature--that is, the <br />application of the techniques may not with certainty provide the information for which they are <br />designed. The study elements, along with their priority and expected duration, are listed below. <br /> <br />Essential Study Element Expected Duration <br /> <br />Update and adjust the Albuquerque Basin ground-water-flow model Continuous <br /> <br />Expand observation-well network Continuous <br /> <br />Install piezometers below Rio Grande 1-2 years <br /> <br />Monitor observation well network Continuous <br /> <br />Compile and automate ground-water-withdrawal data Continuous <br /> <br />Determine production zones within large-capacity production wells Continuous <br /> <br />Monitor the Rio Grande, canal, and drain flows Continuous <br /> <br />Define canal and drain physical characteristics 1-2 years <br /> <br />Conduct and analyze aquifer tests 3-5 years <br /> <br />Update inventOries of land cover and Rio Grande surface-water system lO-year intervals <br /> <br />Determine distribution of lithologies in the inner valley alluvium 1-2 years <br /> <br />Monitor extensometer and geodetic network Continuous <br /> <br />Analyze temperature profiles in piezometers below the Rio Grande 2-3 years <br />(Experimental) <br /> <br />Determine change in aquifer storage through temporal gravity surveys <br />(Experimental) <br /> <br />Useful Study Element Expected Duration <br /> <br />Chemically analyze water from observation wells and use <br />environmental tracers <br /> <br />Compile information to interpret the geohydrologic framework north <br />and south of Albuquerque <br /> <br />Determine the extent of axial channel deposits and faUlts, and estimate the <br />hydrologic characteristics of faults <br /> <br />Estimate recharge along the mountain front <br /> <br />Estimate tributary recharge (Experimental) <br /> <br />Determine evapotranspiration by cottonwoods and riparian communities <br />and relation to water-table depth <br /> <br />Conduct flood-pulse experiment to estimate aquifer characteristics <br />in the alluvium <br /> <br />1 year to <br />Continuous <br /> <br />3-4 years <br /> <br />Continuous <br /> <br />2-3 years <br /> <br />2-3 years <br /> <br />3-4 years <br /> <br />2-3 years <br /> <br />1 year <br /> <br />Several of the study elements are dependent on implementation of other study elements. <br />The plan of study flow diagram shown in figure 1 illustrates this dependency. The essential <br />study elements would be implemented along the information flow paths as shown in figure 1. <br /> <br />viii <br />