International Journal of Environmental & Earth Sciences MedMax Publishers, 2021
The study established the use of Electrical Resistivity Method and Geospatial Technolog... more The study established the use of Electrical Resistivity Method and Geospatial Technology to investigate soil corrosivity and competence in part of Yenagoa, Bayelsa State, Nigeria. A total of 22 Geoelectric was acquired using Abem Terrameter SAS1000 and Schlumberger configuration with a maximum half current electrode spacing of 160 m. Geoelectric layers were determined using IPI2win software and ArcGIS 10.4 for modeling. The results indicate a low elevation of 0.65 m and a high elevation of 29.09 m with an estimated land area of approximately 80 km2, geoelectrical sections of three layers are observed but our main interest is the Topsoil (first layer) and perhaps the second layer with respect to depth. The soil corrosivity of topsoil indicates five corrosivity class namely essentially non-corrosive with an estimated land area of 59%, moderately corrosive is 9%, mildly corrosive with 12%, and soil competent indicating moderately competent of 0.10% and 99% incompetent with geoelectric curve present H, K KH and AH, with a thickness range from 0.4 m to 1.5 m while layer 2 indicate the area contain incompetent with 4.98 km2 land area, moderately competent 28 km2 land area cover, competent 19 km2 and highly competent with a land area cover of 31.39 km2 and soil corrosivity indicate three class namely moderately corrosive with 6% land area, mildly corrosive contains 17% and essentially non-corrosive indicate 61.68 km2 with 77% land area present in layer 2 with thickness ranging from 1.2 m to 18.89 m. Therefore, corrosion-resistant pipes are strongly recommended to forestall challenges associate with rupture of corroded pipes with a depth of about 2 m depth as recommended and GIS techniques have shown to be a useful tool in mapping soil corrosivity and competence using geophysical data.
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