| Autor: |
Robert H. Gilkeson, Douglas E. Laymon, Paul C. Heigold |
| Rok vydání: |
1986 |
| Předmět: |
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| Zdroj: |
Groundwater Monitoring & Remediation. 6:54-61 |
| ISSN: |
1069-3629 |
| DOI: |
10.1111/j.1745-6592.1986.tb01224.x |
| Popis: |
Wastes were to be exhumed and removed from a hazardous and chemical waste disposal site. The major disposal practice was shallow burial of wastes in metal drums in parallel trenches. The actual boundaries of the trenches beneath the landscaped cover were not accurately known. Theoretical two-dimensional models were used to evaluate the application of magnetic methods to define trench boundaries on the disposal site. The models predicted that both the total field and the vertical component anomalies were diagnostic; however, the vertical component anomaly was more focused on the trench boundaries. A survey with a vertical component fluxgate magnetometer was successful in defining trench boundaries. Observations made along traverses that trended perpendicular to the long axis of the parallel trenches indicated vertical magnetic intensity values with a cyclical pattern of large positive values over trenches and large negative values over intertrench corridors. Vertical magnetic intensity values determined with theoretical two-dimensional models compared favorably to the observed vertical magnetic values. The models were used to constrain the interpretation of the field observations to define trench boundaries; the magnetic survey defined trench boundaries with an accuracy within ± 2 feet. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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