Hydrological Modeling of Aquifers and Their Ground Water Potentials: Implications for Water Resources Planning and Management in Parts of Obio/Akpor L.G.A, Rivers State, Nigeria ()
ABSTRACT
This study
examined the hydrological modeling of aquifers and their ground water potentials
for the purposes of water resources planning and management. This was done using
the electrical resistivity method employing the schlumberger electrode configuration
at randomly selected stations to obtain the thicknesses and resistivities of each
layer and depth to the presumably conglomeratic sand stone and its resistivity.
Findings showed that the top soil layer resistivity values vary from 59.3 to 248.4
ohm-m and thickness of 0.6 to 3.9 m. The second layer has resistivity values ranging
from 45.0 to 743.5 ohm-m and a thickness range of 1.5 to 13.8 m. The wet sand is
characterized by resistivity values ranging from 144.8 to 1930.2 ohm-m and a thickness
range of 3.8 to 65.8 m. The conglomeratic sand/sand stone has resistivity values
ranging from 55.8 to 7719.8 ohm-m. The depth to this bottom layer varies from 6.6
to 89.5 m. Findings indicate that the entire profile is a sedimentary formation
represented by lithological units of sand and clayey sand which make for a good
groundwater potentials. However, the groundwater potential zones of the study area
in terms of transmisivity revealed four distinct classes representing “very good”
(Mgbuosimini, Rumuigbo, Okporo, Rumuomasi and Rumuodara), “good” (Alakahia, Rumuodomaya,
Oginigba and Rumuola), “moderate” (Aluu, Rumuekeni, Rumuokoro, Rumuobiakani and
Rumueme), and “low” (Ogbogoro, Ozuoba, Akpajio, Elelenwo, Eliozu, Rumuepirikon,
Rumuokwuta, Rumuebekwe and Rumurolu) groundwater potential in the area. Well logging
should therefore be incorporated in borehole development process for safe and sustainable
yield of groundwater in Obio/Akpor.