Delineation of leachate plume migration by electrical resistivity methods Ile Epo dumpsite, Lagos, Southwestern Nigeria

2018 ◽  
Vol 59 (3C) ◽  
2016 ◽  
Vol 63 (2) ◽  
pp. 97-108
Author(s):  
Cyril Okpoli ◽  
Michael Oladunjoye ◽  
Toluwaleke Ajayi

Abstract An integrated geophysical (involving two-dimensional [2D] electrical resistivity) and petrophysical study was conducted in the Precambrian Crystalline Basement area of Iwaro-oka Akoko, southwestern Nigeria. Five 2D resistivity profiles, both around the perimeters and inside the dump, were investigated with maximum lengths of 100 m. Results of the resistivity imaging delineated the leachate plumes as low-resistivity zones, with values ranging from 3 Ω m to 55 Ω m. The coefficient of permeability ranged from 4.33 × 10-6 to 7.82 × 10-3, and the average porosity ranged from 32 Ω m to 169 Ω m, thus indicating migration of leachate plume to the groundwater due to the high coefficient of permeability and the porosity.


2018 ◽  
Vol 24 (1) ◽  
pp. 25
Author(s):  
Abel Giwa Usifo ◽  
Adewole John Adeola ◽  
Olumide Olufemi Akinnawo ◽  
Kingsley Nosakhare Onaiwu

Author(s):  
O. F. Ogunlana ◽  
O. M. Alile ◽  
O. J. Airen

The Electrical Resistivity Tomography (ERT) data was acquired within the area suspected to have high potential for bitumen occurrence using the Wenner-Schlumberger configuration in Agbabu, southwestern Nigeria. PASI 16GL-N Earth resistivity meter instrument was used to acquire data along five (5) traverses with 5m electrode spacing and traverses length of 150m. The apparent resistivity values obtained was processed using RES2DINV software which helped to automatically obtain the 2D inversion model of the subsurface. This study has shown the occurrence of bitumen between the depth of 13.4m and 9.93m for Traverses 1, 2, 3 and Traverses 4, 5 respectively in a 2-Dimensional electrical resistivity images for boreholes with a depth of about 18m. The results indicate that the bitumen is characterized by good lateral continuity and is sufficiently thick for commercial exploitation.


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