At a contaminated site near Oyster Virginia, spontaneous potential (SP) measurements correlate closely with dissolved oxygen (DO) data from wells, indicating that a contaminant plume can be identified by this geophysical method. The field site is a 200 m X 190 m grassy field underlain by electrically homogeneous, Pleistocene, semiconsolidated sands bearing oxidized groundwater. At this site, DO measurements from 28 wells revealed a zone of reduction created by the biodegradation of buried tomato waste leaching from trenches. SP was measured using two sampling techniques: along a grid of 16 transects at 3 m intervals; and at 5 m intervals along 7 selectively oriented transects between significant wells. Spatial distribution of SP values compared favorably with the patterns formed by the DO data. This correlation was confirmed by the non-parametric Spearman rank correlation analysis, along two transects perpendicular to the redox boundary, which revealed a strong negative correlation between DO and SP at the 99% confidence level. Other potential sources of SP were ruled out by the use of resistivity, magnetometry, and ground penetrating radar, thus isolating redox potentials as the sole cause of SP. Therefore, SP can be used to map zones of reduction present in oxidized subsurfaces when all other sources of SP can be eliminated. / Earth and Environmental Science
| Identifer | oai:union.ndltd.org:TEMPLE/oai:scholarshare.temple.edu:20.500.12613/8668 |
| Date | January 2000 |
| Creators | Korniewicz, Gregory James |
| Contributors | Nyquist, Jonathan, Toran, Laura E., Goodwin, Peter W. |
| Publisher | Temple University. Libraries |
| Source Sets | Temple University |
| Language | English |
| Detected Language | English |
| Type | Thesis/Dissertation, Image |
| Format | 77 pages |
| Rights | IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available., http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | http://dx.doi.org/10.34944/dspace/8632, Digital copy of print original., Theses and Dissertations |
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