Abstract:
An integrated geological, geoelectrical and hydrogeochemical investigations were carried out in Eha-amufu to determine the extent and the distribution of saline zone. Hydrochemical characteristic of the groundwater in Eha-amufu was investigated. Eha-amufu area is underlain by Nkporo Formation and Awgu Formation. Both are of low permeability Formation. Twenty seven (27) Vertical Electrical Sounding (VES) were occupied at different locations within the study area, employing the Schlumberger electrode configuration with a maximum electrode separation of 600m. The VES data were modeled with the IP12win software. The result of the VES revealed that the study area is characterized by 3 to 6 geoelectrical layers, and are predominantly of QH and H curve type. Static water Levels (SWL) of the hand dug well were measured and the result used to generate hydraulic head map. The static water level ranges from 3.0m to 15.0m. Aquifer Protective Capacity (APC) parameters were used to classify the aquifer as moderately good to poor aquifer. Hydrochemical analysis of the groundwater samples collected from ten (10) hand dug well in the study area reveal that weathering is the major process that controls the groundwater chemistry and the water type is Calcium – Chloride. Water quality of Eha-Amufu its environ is not good for drinking based on World Health Organization Guideline for drinking water, but this can serve the purposes of irrigation.
