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The AAPG/Datapages Combined Publications Database

Houston Geological Society Bulletin

Abstract


Houston Geological Society Bulletin, Volume 34, No. 3, November 1991. Pages 22-22.

Abstract: Magna Scan: A Geophysical Tool for Environmental Site Assessments

By

James I. Pritchard

Development of new supplies of water, conservation of water, reuse of Previous HitwasteNext Hit water, and clean-up and prevention of pollution are at an all-time high demand by all sectors of the population. Today, most of the technology applied to these efforts has been limited to drilling exploratory wells, generating subsurface geologic pictures from the well logs, setting monitor wells, and performing hydrological pumping tests and chemical analysis of fluid samples. This approach alone is quite costly compared to an integrated approach of combining this data with geophysical surveys.

The addition of geophysical surveys to subsurface analysis for natural resources has proved to reduce exploration costs and time by as much as 30 to 80 percent. Properly performed electrical resistivity surveys will likewise reduce the costs and time to perform subsurface analysis for Water Resources Previous HitManagementNext Hit.

MagnaScan, since its inception in August of 1988, set out to bring electrical-resistivity tomography to the Water Resources Previous HitManagementTop with its OFFSET LOG and VECTOR SCAN techniques. By August of 1991, some 20 sites in California, Texas, Oklahoma, and Kansas had been successfully investigated, demonstrating the great cost and time effectiveness of these techniques. MagnaScan was successful because it has treated the Water Resource problem as a subsurface reservoir problem rather than as a shallow-depth engineering problem.

MagnaScan moves onward today under the direction of its principal scientists and its capable support staff. It looks forward to continuing to bring economy and solutions to the Water Resources problems.

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