Water table response to barometric pressure changes : a laboratory investigation.

Persistent Link:
http://hdl.handle.net/10150/191548
Title:
Water table response to barometric pressure changes : a laboratory investigation.
Author:
White, Robert R.(Robert Rankin),1942-
Issue Date:
1971
Publisher:
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:
The water level in water-table wells and in evapotranspirometers has been observed to fluctuate in response to barometric pressure changes. It has been suggested that air bubbles entrapped in the porous media cause the water level changes. It was to test that hypothesis that this study was undertaken. Previous studies of barometric effects are reviewed. Possible sources and consequences of gas in aquifers are discussed. Experiments using gamma-attenuation equipment are described which allow measurement of the amount of air contained in a sample of water-saturated sand at different pressure levels. The theory and practice of gamma-attenuation measurements and the applicability of this method to hydrologic studies are explained. The experimental results demonstrate that air bubbles in the water-saturated sand do change in size in response to pressure changes and that this size change accounts in large part for water level changes. However, an exact correlation between air content and water level was not found, due in part to the difficulty in measuring the small changes which occur. Additional mechanisms which may cause water-level fluctuations are suggested.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Groundwater -- Research.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Simpson, Eugene S.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleWater table response to barometric pressure changes : a laboratory investigation.en_US
dc.creatorWhite, Robert R.(Robert Rankin),1942-en_US
dc.contributor.authorWhite, Robert R.(Robert Rankin),1942-en_US
dc.date.issued1971en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © 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.en_US
dc.description.abstractThe water level in water-table wells and in evapotranspirometers has been observed to fluctuate in response to barometric pressure changes. It has been suggested that air bubbles entrapped in the porous media cause the water level changes. It was to test that hypothesis that this study was undertaken. Previous studies of barometric effects are reviewed. Possible sources and consequences of gas in aquifers are discussed. Experiments using gamma-attenuation equipment are described which allow measurement of the amount of air contained in a sample of water-saturated sand at different pressure levels. The theory and practice of gamma-attenuation measurements and the applicability of this method to hydrologic studies are explained. The experimental results demonstrate that air bubbles in the water-saturated sand do change in size in response to pressure changes and that this size change accounts in large part for water level changes. However, an exact correlation between air content and water level was not found, due in part to the difficulty in measuring the small changes which occur. Additional mechanisms which may cause water-level fluctuations are suggested.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshGroundwater -- Research.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairSimpson, Eugene S.en_US
dc.identifier.oclc213296145en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.