Volume 59, Issue 329, May 2023

Application of geo-electric indices in groundwater vulnerability mapping: A case study of Agbor, Delta State, southern region Nigeria

Omajene Aghogho¹, Ighrakpata F², Umayah OS^3♦

¹Demonstration Secondary School, College of Education, Warri, Delta State, Nigeria
²Physics Department, College of Education, Warri, Delta State, Nigeria
³Department of Physics, Delta State College of Education Mosogar, Delta State, Nigeria

^♦Corresponding author
Department of Physics, Delta State College of Education Mosogar, Delta State, Nigeria

ABSTRACT

To identify the aquifer protection and groundwater potential of the aquifer in Agbor and its surroundings, Delta State, Nigeria, an electrical resistivity approach was used. The Schlumberger configuration was used to conduct a total of 16 vertical electrical soundings (VES) surveys. To process and interpret the VES data, a quantitative partial curve matching technique was used, which involved computer models and iterative software. Aquifer resistivity, aquifer thickness, aquifer conductivity and transverse resistivity, transmissivity are parameters that are estimated, with a value range from 205.3 to 3942.9Ωm, 17.3 to 36.4 m. 0.000253 to 0.004871, 1070.24 to 118681.3 and 173 to 364 m²/day respectively. Results obtained from VES data suggested that the layer model ranges from 5 to 6 layers, it was observed that curve KHA is the dominant curve type with 44%, followed by HAA at 25%, while curve HKQH is 7%, HKH, KHAA, HAK and QHA are 6%. Findings from longitudinal conductance revealed that aquifer protective capacity ranges from weak to poor; this implies groundwater is prone to surface contamination. Deduction from this study suggested that the study is vulnerable to surface contamination due to anthropogenic activities.

Keywords: Vertical, conductance, array, resistivity, groundwater

Discovery, 2023, 59, e51d1210

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Published: May 2023