Open AccessGeophysical Investigations and Aquifer Characteristics of the Benin Formation at Agbarho, Delta State, Nigeria
Author(s) -
F. C. Ugbe,
D.O. Ugbome,
Erik Emmanuel
Publication year - 2021
Publication title -
journal of applied science and environmental management
Language(s) - English
Resource type - Journals
eISSN - 2659-1499
pISSN - 2659-1502
DOI - 10.4314/jasem.v25i6.8
Subject(s) - aquifer , geology , groundwater , hydraulic conductivity , vertical electrical sounding , lithology , geophysical survey , topsoil , aquifer properties , aquifer test , range (aeronautics) , hydrology (agriculture) , geomorphology , soil science , geotechnical engineering , geophysics , petrology , groundwater recharge , soil water , materials science , composite material
Groundwater investigations were carried out at Agbarho using geophysical survey method to delineate the aquifer and subsurface lithology. Three (3) vertical electrical sounding were conducted with a maximum current electrode spacing of 300m. The data acquired were subjected to partial curve matching and computer processing. The results delineated five geoelectric layers for the area, which include; topsoil, silty sand, silty clay, fine sand, medium grain sand and coarse sand. The Dar-Zarrouk parameter revealed an aquifer system that has a resistivity values ranging from 503.9-966.9ohm-m, an average hydraulic conductivity of 7.73 m/day, and transmissivity in the range of 156.24-181.44m2/day. The depth to the aquifer range from 13.2-42.7m and the aquifer thickness is between 7-36.7m. Results from seven down-hole logs revealed the presence of silty sand, fine sand and fine-medium grained sand. The transmissivity values from pumping test range from 162.29-286.56m2/day and storativity is from 0.001-0.00838. The aquifer is capable of yielding useful quantity of water to the wells and sustainable groundwater management plan can be develop for the area.