ABSTRACT
The U. S. Geological Survey has been collecting hydrologic and
geologic data in the major irrigated basins of Arizona for many years as
part of a statewide ground-water survey. The Agricultural Engineering
Department, Agricultural Experiment Station, University of Arizona, has
been collecting data inparts of the State for nearly an equal period of time.
The work of the Geological Survey is done mainly in cooperation with the
Arizona State Land Department, Obed M. Lassen, Commissioner; that of
the Agricultural Engineering Department is in cooperation with the city of
Tucson and Pima County. For several years, the results of the statewide
ground-water survey have been presented in the annual reports on ground
water in Arizona. In recent years, the volume of data collected has increased,
and the need for a comprehensive analysis of the data also has
increased along with the growing demand for water. This is the third in
a series of reports by the Geological Survey on individual basins, and it
is the first report prepared in conjunction with the Agricultural Engineering
Department ofthe University of Arizona, The reports present a more detailed
study of the hydrologic and geologic data than is feasible in the annual
reports covering the entire Stat8.
Source: An Appraisal of the Ground-Water Resources of Avra and Altar Valleys, Pima County, Arizona.
Reports and other documents about Sonoran Desert ecology, management, and conservation. Curated by the not-for-profit Altar Valley Conservation Alliance (AVCA) located outside Tucson, AZ.