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Three-dimensional traveltime tomogra...

Azaria, Aron.

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Three-dimensional traveltime tomography at a shallow groundwater contamination site.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Three-dimensional traveltime tomography at a shallow groundwater contamination site./
Author:	Azaria, Aron.
Description:	119 p.
Notes:	Source: Masters Abstracts International, Volume: 41-06, page: 1688.
Contained By:	Masters Abstracts International41-06.
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1414244

Three-dimensional traveltime tomography at a shallow groundwater contamination site.
Azaria, Aron.

Three-dimensional traveltime tomography at a shallow groundwater contamination site. - 119 p.

Source: Masters Abstracts International, Volume: 41-06, page: 1688.

Thesis (M.A.)--Rice University, 2003.

I performed traveltime tomography on a 3-D seismic refraction dateset collected at Hill Air Force Base, Utah in 2000. The survey covers a 95m by 36m area over a contaminated aquifer that is bounded below by a clay aquiclude, in which a paleochannel acts as a trap for the contaminants.Subjects--Topical Terms:

535228
Geophysics.

Three-dimensional traveltime tomography at a shallow groundwater contamination site.
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035 $a (UnM)AAI1414244
035 $a AAI1414244
040 $a UnM $c UnM
100 1 $a Azaria, Aron. $3 1953628
245 1 0 $a Three-dimensional traveltime tomography at a shallow groundwater contamination site.
300 $a 119 p.
500 $a Source: Masters Abstracts International, Volume: 41-06, page: 1688.
500 $a Chair: Colin A. Zelt.
502 $a Thesis (M.A.)--Rice University, 2003.
520 $a I performed traveltime tomography on a 3-D seismic refraction dateset collected at Hill Air Force Base, Utah in 2000. The survey covers a 95m by 36m area over a contaminated aquifer that is bounded below by a clay aquiclude, in which a paleochannel acts as a trap for the contaminants.
520 $a Presented are results using an iterative, nonlinear, traveltime tomographic approach applied to 187,877 traveltimes. The resulting velocity model shows that the near-surface velocity increases by roughly a factor of 5 in the upper 15m, from about 300m/s to 1500m/s. Cross-sections through the model show a north-south trending low-velocity feature interpreted to be the channel structure. Checkerboard tests applied to the velocity model establishes a 7.5m lateral resolution throughout most of the depth range of interest. While the long wavelength features of the model reveal the paleo-channel, the velocity model is likely a broad and smooth characterization of the true velocity structure.
590 $a School code: 0187.
650 4 $a Geophysics. $3 535228
650 4 $a Engineering, Environmental. $3 783782
690 $a 0373
690 $a 0775
710 2 0 $a Rice University. $3 960124
773 0 $t Masters Abstracts International $g 41-06.
790 1 0 $a Zelt, Colin A., $e advisor
790 $a 0187
791 $a M.A.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1414244