Geophysical Investigation of Some Flood Prone Areas in Ota, Southwestern Nigeria
No Thumbnail Available
Date
Journal Title
Journal ISSN
Volume Title
Publisher
IDOSI Publications
Abstract
Description
Thirteen shallow vertical electrical resistivity soundings using Schlumberger array were conducted
within the study area. The aim of the study was to investigate the nature of the subsurface in some flood prone
areas within the study area by determining the lithology and the corresponding inverse model resistivities at
the depths investigated and hence the cause of flooding in the area during the wet season. The resistivity
sounding data were collected along seven traverses using a Campus Tigre terrameter. The observed data were
interpreted quantitatively using curve matching and computer assisted iteration method. The results of the
inversion show a lithology that comprises of the top soil and a paralic sequence of sand and lateritic clay at the
depth investigated with varied resistivity and thickness. The flooding is thought to be due to the shallow
lateritic clay layer at an average depth of 5.2 m with thickness ranging from 14.5m to 31.8m at the various points
of investigation and the shallow depth of the water table
Keywords
QC Physics