JWARP  Vol.5 No.6 , June 2013
Groundwater Investigation Using Geoelectrical Method: A Case Study of the Western Region of Cameroon
ABSTRACT

A geoelectrical survey using the electrical resistivity method was carried out in some villages in the western region of Cameroon to investigate the sub-surface layers and evaluate the characteristics of aquifers. The direct current electrical resistivity method was utilized for the present study. Applying the Schlumberger array, a total of twenty four (24) Vertical Electrical Soundings (VES) were conducted. Quantitative and qualitative interpretations of data were carried out to determine the nature and thickness of the aquifer zone combined with existing litho-logs aided correlation of geoelectric sections to litho-logs. Four to five geoelectric layers were delineated from the survey area. The first layer which is the topsoil has resistivity values ranging from 6 - 949 Ωm and the thickness is between 0.2 - 4.2 m. The second layer which is made up of clay and laterite has resistivity values ranging between 9 - 1862 Ωm and thickness range from 1.0 - 16.4 m. The third and fourth geoelectric layers are made up of clay and granite/basalts with thickness varying from 2.2 - 39.5 m which corresponds to an aquifer horizon. Resistivity values of the aquifer ranges from 10 to 70,506 Ωm. The resistivity map drawn from these measurements shows the presence of a low resistivity zone which indicates the reflection in the direction of ground water from northeast to southwest with the recharge concentrated to the south of the study area. This study has revealed for this area, an average depth of the aquifer of 32 m with the average thickness of the aquifer being 22 m. The geoelectric sections of some VES stations demarcated corroborate very well with the geological description of the area.


Cite this paper
T. Keleko, J. Tadjou, J. Kamguia, T. Tabod, A. Feumoe and J. Kenfack, "Groundwater Investigation Using Geoelectrical Method: A Case Study of the Western Region of Cameroon," Journal of Water Resource and Protection, Vol. 5 No. 6, 2013, pp. 633-641. doi: 10.4236/jwarp.2013.56064.
References
[1]   W. A. Teikeu, P. N. Njandjock, T. Ndougsa-Mbarga and T. C. Tabod, “Geoelectric Investigation for Groundwater Exploration in Yaounde Area, Cameroon,” Intemational Joumal of Geosciences, Vol. 3, No. 3, 2012, pp. 640-649. doi:10.4236/ijg.2012.33064

[2]   J. Asfahani, “Geoelectrical Investigation for Characterizing the Hydrogeological Conditions in Semi-Arid Region in Khanasser Valley, Syria,” Journal of Arid and Environments, Vol. 68, No. 1, 2007, pp. 31-52. doi:10.1016/j.jaridenv.2006.03.028

[3]   O. G. Omosuyi, A. Adeyemo and A. O. Adegoke, “Investigation of Groundwater Prospect Using Electromagnetic and Geoelectric Sounding at Afunbiowo, Near Akure, Southwestern Nigeria,” Pacific Journal of Science and Technology, Vol. 8, No. 2, 2007, pp. 172-182.

[4]   O. E. Osagie, “Geoelectritric Groundwater Investigation, Southwestern Nigeria,” Journal of Environmental Hydrology, Vol. 18, No. 3, 2010, p. 3.

[5]   L. J. Meli’I, P. N. Njandjock and D. H. Gouet, “Magnetotelluric Method for Groundwater Exploration in Crystalline Basement Complex, Cameroon,” Journal of Environmental Hydrology, Vol. 19, No. 16, 2011, p. 16.

[6]   O. J. Oseji, E. A. Atakpo and E. C. Okolie, “Geoelectric Investigation of the Aquifer Characteristics and Groundwater Potential in Kwale, Delta State, Nigeria,” Journal of Applied Science and Environmental Management, Vol. 9, No. 1, 2005, pp. 157-160.

[7]   N. N. Onu, “Estimates of the Relative Specific Yield of Aquifers from Geo-Electrical Sounding Data of the Coastal Plains of Southeastern Nigeria,” Journal of Technology and Education in Nigeria, Vol. 8, No. 1, 2003, pp. 69-83.

[8]   C. J. Dumort, “Carte Géologique de Reconnaissance du Cameroun à L’échelle du 1/500,000, Coupure Douala-Ouest Avec Notice Explicative,” Bulletin de la Direction de Géologie et des Mines, Cameroun, 1968, p. 69.

[9]   G. Njiekak, W. Doir, J. P. Tchouankoué and G. Zulanf, “U-Pb Zircon and Microfabric Data of (Meta) Granitoids of Western Cameroun: Constraints of the Timing of Pluton Emplacement and Deformation in the Pan-African Belt of Central Africa,” Lihos, Vol. 102, No. 3-4, 2008, pp. 460-477.

[10]   D. G. Kouankap Nono, “Etude du Cirsaillement Centre Camerounais Dans la Région de Banéfo-Mvoutsaha au N-E de Bafoussam, Dans le Domaine Centre de la Chaine Panafricaine Nord Equatoriale: Pétrogenese, Géochronologie et Structurologie des Formations du Socle,” Ph.D. These de Doctorat, Université de Yaoundé 1, Yaoundé, 2011.

[11]   C. Chebeu, C. D. N. Nlend, J. P. Nzenti and S. Ganno, “Neoproterozoic High-K Calc-Alcaline Granitoids from Bapa-Batié, North Equatorial Fold Belt, Central Cameroon: Petrogenesis and Geodynamic Significance,” The Open Geology Journal, Vol. 5, 2011, pp. 1-20.

[12]   D. Tchaptchet Tchato, “Geology of the Kekem Area (Cameroun Central Domain): Metamorphic Petrology, P-T-t Path, EMP, LA-ICPMS Dating and Implications for the Geodynamic Evolution of the Pan-African North Equatorial Folt Belt,” Ph.D. These de Doctorat, Université de Yaoundé 1, Yaoundé, 2012.

[13]   M. F. Tchoua, “Contribution à L’Etude Géologique et Pétrologique que Quelques Volcans de la ‘Ligne du Cameroun’ (Monts Manengouba et Bamboutos),” These d’Etat, Université Clermont-Ferrand, Clermont-Ferrand, 1974.

[14]   P. Kamgang, “Contribution à L’Etude Géochimique et Petrologique du Massif de Nko-Gam (Pays Bamoun), Ouest Cameroun,” These 3eme Cycle, Université de Yaoundé, Yaoundé, 1986.

[15]   P. Wandji, J. J. Menard and M. F. Tchoua, “L’activité Hydromagmatique Récente Dans la Plaine du Noun (Ouest Cameroun) et Les Aléas Volcaniques Associés,” Compte Rendu de L’académie des Sciences, Vol. 319, No. 2, 1994, pp. 417-422.

[16]   H. Pfannkuch, “On the Correlation of Electrical Conductivity Properties of Porous Systems with Viscous Flow Transport Coefficients,” Developments in Soil Science, Vol. 2, 1972, pp. 42-54. doi:10.1016/S0166-2481(08)70527-0

[17]   A. Takounjou-Fouépé, V. V. S. R. Gurunadha, J. N. Ndam, L. N. Sigha and G. E. Ekodeck, “Groundwater Flow Modeling in the Upper Anga’a River Watershed, Yaounde, Cameroun,” African Journal of Environmental Science and Technology, Vol. 3, No. 10, 2009, pp. 341-352.

 
 
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