Mapping Groundwater Contamination around a Dumpsite in Benin City, Nigeria Using VLF-EM Method
| Autor: | I. Ikhifa, M. N. Umego |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Groundwater contamination
010504 meteorology & atmospheric sciences Soil test Electrical resistivity and conductivity Electrical resistance survey Field data Benin city Soil science Electrical resistivity tomography 010502 geochemistry & geophysics 01 natural sciences Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geography, Environment and Earth Science International. 4:1-9 |
| ISSN: | 2454-7352 |
| DOI: | 10.9734/jgeesi/2016/19899 |
| Popis: | An electromagnetic survey was used to delineate conductive and non conductive zones in order to accurately locate electrical resistivity tomography profiles at Ikhueniro refuse dumpsite. The survey comprised four roughly N ‐ S, and E ‐ W direction, very low frequency electromagnetic (VLF-EM) profiles around the perimeter of refuse dumpsite where contaminants/conductive bodies were observed using resistivity imaging and soil analysis method in a previous study. The Fraser and the Karous-Hjelt filters were used in the interpretation of the VLF-EM field data. The data inversion was carried out using a 2-D code which was constrained using previous resistivity survey. The results of the resistivity models calculated from the pseudosections indicate the presences of low resistivity zone up to a depth of 50 m within the subsurface that is in a good agreement with the results obtained from the previous resistivity imaging survey which indicated leachate contamination at the refuse dumpsite. |
| Databáze: | OpenAIRE |
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