Estimation of Aquifer Pontential Using Geoelectric and Hydraulic Parameters: A Case Study of Owerri And Some Selected Towns in Imo State

Authors

  • Kennedy Achilike Abia State University Uturu

Keywords:

Groundwater Potential, Groundwater Vulnerability, Protective Capacity, Transmissivity and Hydraulic Conductivity

Abstract

The aim of the study was to estimate the hydraulic characteristics of aquifers in Owerri and some selected towns in Imo State from surface geophysical techniques. Sixteen (16) Schlumberger vertical electrical soundings (VES) were carried out with maximum current electrode separation (AB) of 400 m. The data was acquired using R-plus resistivity meter and processed with Resixtm Interpex Software.

The results of the VES interpretation identified 3-5 geoelectric layers overlying the aquiferous layers: surface soil, lateritic earth, the fine-medium-coarse grained sands with intercalations of clay which constitute the water bearing zone. The curves identified in the study area include HK, KHK, KQQQ, KQHK, AAKH, HKHK, AKHK and HAAK. The results of the qualitative interpretation indicate that majority of the field curves terminated as K-shaped and Q-shaped type curves.

The general shapes suggest that the transverse resistance of the aquifers can be considered as the dominant parameter for the estimation of transmissivity in the study area. The main aquiferous zones occur between the 4th and 6th geoelectric layers with a resistivity range of 409.5 - 12704.7 ohm-m, depths range varying from 39.37 – 207.30m, and layer thickness range between 28.14 and 176.70m.

The hydraulic characteristics of the aquifer estimated from the geoelectric parameters revealed that the aquifer has protective capacities of between 0.008 and 0.085 mhos, transverse resistance ranges from 39573.3 – 1.911E + 06 ohm-, transmissivity values from 1132.26 - 105211.12 /day and hydraulic conductivity ranges from 11.72 – 2448.77 m/day.

The estimated aquifer transmissivity values suggest that aquifer materials are highly permeable to fluid movement within the aquifer. This study has demonstrated the efficacy of surface geophysics in estimating hydraulic characteristics of an aquifer where pumping test data are not available and also its vulnerability to surface contaminants.

Downloads

Download data is not yet available.

Author Biography

Kennedy Achilike, Abia State University Uturu

Department of Industrial Physics, Abia State University Uturu, Nigeria

References

Bayewu, O. O., (2018). NRIAG Journal of Astronomy and Geophysics, https://doi.org/10.1016/j.nrjag.2018.05.002.

Devi S. P., Sirinivasulu S. and Raju K. K. (2001). Delineation of groundwater potential zones and electrical resistivity studies for groundwater exploration. Environ. Geol. 40 1252 – 1264.

Frohlick R. K., Barosh P. J. and Boving T. (2008). Investigating changes of electrical characteristics of the saturated zone affected by hazardous organic waste: J. Appl. Geophysics.64 25 – 36.

Gupta G., Erram V. C. and Kumar S. (2012). Temporal geoelectric behavior of dyke aquifers in northern Deccan volcanic Province, India: J. earth system SCI. 121(3) 723 – 732.

Hubbard S. and Rubin Y. (2002). EOS 83(51) 573 – 581

Johansen H. K. (1977). Geophysical prospecting. 25(4) 667-691.

Karlik G. and Kaya M. A. (2001). Investigation of groundwater contamination using electric and electromagnetic methods at an open waste-disposal site: a case study from Isparta,Turkey; Environ. Geol. 40 725-731.

Kelly W. E. (1977). Groundwater. 15(6) 420 – 425

Kosinski W. K. and Kelly W. E. (1981). Groundwater 19(2) 163 – 171.

Lenkey L., Hamori Z. and Minalffy P. (2005). Investigating the hydrogeology of a water supply area using direct-current vertical electrical sounding: Geophysics 70(4) 1111 – 1119.

Oladapo M. I. and Akintorinwa O. J. (2007). Global Journal of pure and applied science. 13(1) 55 – 61.

Opara A. I., Onu N. N. and Okoroafor D. Y. (2012). Geophysical sounding for the determination of aquifer hydraulic characteristics from Dar-Zarrouk parameters: case study of Ngor Okpala, Imo River Basin, Southeastern Nigerial. The Pacific Journal of science and Technology. 13 590 – 601.

Park Y. H., Doh S. J. and Yun S. T. (2007). Geoelectric resistivity sounding of riverside alluvial aquifer in an agricultural area at Buyeo, Geum River watershed, Korea: An application to ground water contamination study; Environ. Geol. 53 849 – 859.

Salem H. S. and Chilingarian G. V. (1999). Journal of Petroleum science and Engineering. 23(2) 55-61.

Vereecken H., Kemna A., Munch H. M., Tillmann A. and Verweerd A. (2005). Aquifer characterization by Geophysical methods. Encyclopedia of Hydrological sciences. Edited by M. G. Anderson. John Wiley and sons Ltd.

Zohdy A. A. R. (1969). The use of Schlumberger and equatorial soundings in groundwater investigations near El Paso, Texas. Geophysics 34 713 – 728

Zohdy A. A. R., Eaton G. P., Mabey D. R. (1974). Application of surface geophysics to groundwater investigation: Techniques of water resources investigations of the united Geophysical survey Book. United states Government Printing office, Washington D1, P. 116.

Published

2020-04-30

How to Cite

Kennedy Achilike. (2020). Estimation of Aquifer Pontential Using Geoelectric and Hydraulic Parameters: A Case Study of Owerri And Some Selected Towns in Imo State. To Physics Journal, 5, 1-12. Retrieved from https://purkh.com/index.php/tophy/article/view/659

Issue

Section

Research Articles