This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

No description available.

As Arizona enters the 1980's, we see that population growth, economic expansion, and resource depletion go hand-in-hand. Non-renewable groundwater-reserves in Arizona are being extracted at rates that cannot long continue without incurring serious consequences, economic as well as environmental. Growth of irrigated agriculture in the alluvial basins of the state, growth of urban and suburban populations, and,growth of industrial pumping, especially for copper mining -milling and for cooling of electric power generation facilities, have incurred a heavy draft on the state's aquifers. The net result of such ground-water withdrawals has been the "mining" of underground water reserves, a continuing overdraft in excess of natural replenishment, and steadily dropping water tables. This rate of depletion of ground water is generally considered to be the most serious water problem in Arizona. It is by no means the only problem. We must be concerned also with maintenance of water quality in view of existing and potential pollution; administrative systems for equitable and efficient water allocation and use; and the legal and environmental aspects of water acquisition and utilization.In order to assess present and possible future water conditions in the state relative to growth, water resources will be viewed from the standpoint of (1) water usage, both quantitative and qualitative; (2) conservation of water; (3) availability of water; and (4) projected water needs.

A Handbook Prepared by The University of Arizona for the City of Tucson.

No description available.

Arizona agriculture faces many changes in the near future. One of the most imminent changes will come from the enactment of the 1980 Arizona Groundwater Management Act. The 1980 AGWMA is designed ultimately to curtail the use of groundwater in Arizona. Agriculture will be affected since this sector used approximately 87 percent of all water in the State in 1980. This study reports on the possible effects that a proposed pump tax and water duty policy would have on agriculture within the Phoenix Active Management Area. The PAMA is one of four such areas in the State that have been identified as needing groundwater use management. The results of this study indicate that the proposed water duty is more effective in curbing groundwater use than the proposed pump tax. Investment in more water application efficient irrigation technologies is also important in this study. However, substantial amounts of capital investment funds will be needed to begin this investment.