Geochemistry of ground water in Avra Valley, Pima County, Arizona
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azu_td_hy_e9791_1986_249_sip1_w.pdf
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azu_td_hy_e9791_1986_249_sip1_w.pdf
Issue Date
1986Keywords
Hydrology.Geochemistry -- Arizona -- Avra Valley.
Geochemistry -- Arizona -- Pima County.
Groundwater -- Arizona -- Avra Valley.
Groundwater -- Arizona -- Pima County.
Committee Chair
Simpson, Eugene S.Metadata
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The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.Abstract
A geochemical evaluation of the ground water in Avra Valley, Arizona using major ions and the stable isotopes deuterium and oxygen-18 verifies that ground-water recharge from the surrounding mountains is negligible and that most ground water enters the valley as underflow from Altar Valley. Primarily granitic sediments result in soft waters with elevated pH in southern Avra Valley. Increasing sedimentary mineralization in northern reaches produces slightly harder waters. Elevated nitrate in the ground water results from intense local agriculture; uneven distribution of nitrate and corresponding ground-water mounding suggest leakage around irrigation well casings as the primary pathway for nitrates to the ground water.Type
Thesis-Reproduction (electronic)text
Degree Name
M.S.Degree Level
mastersDegree Program
Hydrology and Water ResourcesGraduate College