Groundwater aquifer potential using electrical resistivity method and porosity calculation: a case study | ||
| NRIAG Journal of Astronomy and Geophysics | ||
| Volume 9, Issue 1, January 2020, Pages 168-175 PDF (1.91 M) | ||
| DOI: 10.1080/20909977.2020.1728955 | ||
| Author | ||
| M.A. Rashed | ||
| Abstract | ||
| This study uses aquifer characteristics such as the aquifer thickness, depth to the aquifer, and the subsurface porosity calculated from 1-D vertical electrical sounding data to evaluate groundwater potential. Thirty geoelectric investigations were carried out using Schlumberger-vertical-electrical-sounding (VES). The VES data were plotted against their respective current electrode spacing (AB/2) and presented as curves. The curves were interpreted quantitatively by partial curve matching and 1-D computer-assisted forward modelling using the WINRESIST version1.0 software. Isopach and isoresistivity maps of aquifer units in the area were generated from 1-D vertical electrical sounding data. The investigated area was subdivided into three zones of high (C); medium (B) and low (A) groundwater potential. Zone A overburden thickness <20 m has 30%, zone B with overburden thickness <30 m, which is the most predominant occupies 55% while 15% overburden thickness for zone C is <40 m. The subsurface porosity is calculated using Archie’s Law. The aquifer in the northeastern and southeastern parts of the study area were determined to be of good quality and can yield reasonable quantities of water that can serve the community. | ||
| Keywords | ||
| Aquifer; porosity; Groundwater; yield; electrical resistivity | ||
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