Efficiency of two water wells in Tucson Basin.
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azu_td_hy_e9791_1970_439_sip1_w.pdf
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azu_td_hy_e9791_1970_439_sip1_w.pdf
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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
Two water wells at the Water Resources Research Center (WRRC), The University of Arizona, were used as a thesis study to examine changes in the wells’ efficiencies. Seismic study, grain-size analysis, constant pump tests, and step-drawdown tests were used to explain the layered conditions and the hydraulic characteristics of the water -bearing media. One of the wells R₁ seems to be affected by the recharge tests that have been conducted over a long period; formation losses increased from 14 sec/ft² in 1967 to 19 sec/ft² in 1970. Both wells, R₁ and R₂, exhibited high well loss values, but well R₂ seems to be more highly affected. Losses in well R₁ are suspected as being caused by plugging of the aquifer by fine suspended particles and entrained air. Well losses in well R₂ are probably caused by inadequate well diameter and casing perforations. Boundary effects might be another cause for the change in discharge rates.Type
Thesis-Reproduction (electronic)text
Degree Name
M.S.Degree Level
mastersDegree Program
Mining and Geological EngineeringGraduate College