Measurement of Threshold Friction Velocities at Potential Dust Sources in Semi-arid Regions

Persistent Link:
http://hdl.handle.net/10150/596087
Title:
Measurement of Threshold Friction Velocities at Potential Dust Sources in Semi-arid Regions
Author:
King, Matthew A.
Issue Date:
2015
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 threshold friction velocities of potential dust sources in the US Southwest were measured in the field using a Portable Wind Tunnel, which is based on the Desert Research Institute's Portable In-Situ Wind Erosion Laboratory (PI-SWERL). A mix of both disturbed and undisturbed surfaces were included in this study. It was found that disturbed surfaces, such as those at the Iron King Mine tailings site, which is part of the EPA's Superfund program and contains surface concentrations of arsenic and lead reaching as high as 0.5% (w/w), had lower threshold friction velocities (0.32 m s⁻¹ to 0.40 m s⁻¹) in comparison to those of undisturbed surfaces (0.48 to 0.61 m s⁻¹). Surface characteristics, such as particle size distribution, had effects on the threshold friction velocity (smaller grain sized distributions resulted in lower threshold friction velocities). Overall, the threshold friction velocities of disturbed surfaces were within the range of natural wind conditions, indicating that surfaces disturbed by human activity are more prone to causing windblown dust.
Type:
text; Electronic Thesis
Keywords:
Dust; Portable Wind Tunnel; Semi-Arid; Threshold Friction Velocity; Atmospheric Sciences; Aerosol
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Atmospheric Sciences
Degree Grantor:
University of Arizona
Advisor:
Betterton, Eric A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleMeasurement of Threshold Friction Velocities at Potential Dust Sources in Semi-arid Regionsen_US
dc.creatorKing, Matthew A.en
dc.contributor.authorKing, Matthew A.en
dc.date.issued2015en
dc.publisherThe University of Arizona.en
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
dc.description.abstractThe threshold friction velocities of potential dust sources in the US Southwest were measured in the field using a Portable Wind Tunnel, which is based on the Desert Research Institute's Portable In-Situ Wind Erosion Laboratory (PI-SWERL). A mix of both disturbed and undisturbed surfaces were included in this study. It was found that disturbed surfaces, such as those at the Iron King Mine tailings site, which is part of the EPA's Superfund program and contains surface concentrations of arsenic and lead reaching as high as 0.5% (w/w), had lower threshold friction velocities (0.32 m s⁻¹ to 0.40 m s⁻¹) in comparison to those of undisturbed surfaces (0.48 to 0.61 m s⁻¹). Surface characteristics, such as particle size distribution, had effects on the threshold friction velocity (smaller grain sized distributions resulted in lower threshold friction velocities). Overall, the threshold friction velocities of disturbed surfaces were within the range of natural wind conditions, indicating that surfaces disturbed by human activity are more prone to causing windblown dust.en
dc.typetexten
dc.typeElectronic Thesisen
dc.subjectDusten
dc.subjectPortable Wind Tunnelen
dc.subjectSemi-Ariden
dc.subjectThreshold Friction Velocityen
dc.subjectAtmospheric Sciencesen
dc.subjectAerosolen
thesis.degree.nameM.S.en
thesis.degree.levelmastersen
thesis.degree.disciplineGraduate Collegeen
thesis.degree.disciplineAtmospheric Sciencesen
thesis.degree.grantorUniversity of Arizonaen
dc.contributor.advisorBetterton, Eric A.en
dc.contributor.committeememberBetterton, Eric A.en
dc.contributor.committeememberArellano, Avelino F.en
dc.contributor.committeememberSaez, Eduardoen
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.