APPLICATIONS OF 2D ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) TECHNIQUES TO SITE INVESTIGATIONS AT IGUOVIEMWEN COMMUNITY SOUTH-SOUTH NIGERIA.
DOI:
https://doi.org/10.60787/jnamp.v67i2.368Keywords:
Site Investigations, Resistivity, 2D Abem TerrameterAbstract
Geophysical investigations involving the use of 2D electrical resistivity tomography (ERT) techniques have been used to carry out site investigations at Iguoviemwen Community Southern Nigeria, to study the nature of the subsurface so as to assess its suitability for the construction of heavy structures. Five (05) high resolution 2D electrical resistivity images were acquired using the Wenner configuration array method with minimum electrode separation of 5m. The Abem terrameter SAS 4000 was used to carry out the study and RE2DINV software was used to analyze and invert the acquired data. A profile length of 200m was surveyed and an average depth of 39.6m and 57.2m were covered at the study location. The results revealed the presence of 3 main geoelectric layers beneath the subsurface. Which were identified as top Layer, consisting mainly Laterite and some pockets of Clayey Soil, the Middle Layer which consisted of Compacted coarse and Dry Sand and the bottom Layer which consisted mainly of Sandstones.
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