Aspects of Geophysical Exploration for Groundwater Using Vertical Electrical Sounding (VES) in Parts of University of Benin, Benin City, Edo State

Journal of Applied Sciences and Environmental Management

IDEHAI, IMOUKHUEDE M.¹  EGAI, AYIBAWARI O.¹ 

关键词: Vertical Electrical Sounding (VES);    Hydrogeological Parameters;    Aquifer;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

A geophysical survey using vertical electrical sounding (VES) was undertakenwithin the University of Benin (Ugbowo Campus) in an attempt to ascertain aspects of thehydrogeological parameters for groundwater exploitation. Six (6) vertical electrical soundingswith electrode spacing of 215m AB/2 were occupied along the traverse, with the aid ofABEM SAS 1000 Terrameter set. The data were interpreted using the IXID and 3-D fieldmapcomputer softwares. The subsurface stratigraphy is as follows; (262.43-784.7Ωm);topsoil, (205.65-3666.4Ωm); wet laterite, (44.017-2201Ωm); anomalous soil, (601.03-1450Ωm); clayed/silty sand, (2712.38-11741Ωm); dry sand, and (2909.7-12423Ωm); asaquifer. The results reveal depth to water table ranges of 31.2-65.5m. The range of values ofminimum thickness of the aquifer across the VES is from 45-63m. VES 3 is the shallowestand may be the cheapest to drill and install a borehole. VES 6 with a inferred depth of 63-65.5m, will probably be the best area to site a borehole in spite of the expected costimperatives. The area shows slight spatial variations and plausibly attests to naturalinhomogeneity, anthropogenic interplay in the course of the development of the area viaconstruction, and very marginal susceptibility to contamination from the health centre andhostels within the study area. Furthermore, the results conformed to those of previous writerswho described the aquifer as sandy and highly prolific.

【 授权许可】

Unknown