Nigeria - SEG

Integrated groundwater potentials and aquifer vulnerability study in parts of Anambra State, Nigeria

Location: Anambra State, Nigeria
Status: Complete
Project Partners: Nnamdi Azikiwe University, Chukwuemeka Odumegwu Ojukwu University, Department of Water Resources of the Anambra State Ministry of Public Utilities, Rural Water Supply and Sanitation Agency (RUWASSA), Nigeria Geological Survey Agency (NGSA); Noble Geoservices Limited, Keydrill Resources Nigeria Limited, National Water Resources Capacity Building Network – South East Centre; Geoscientists without Borders® (GWB)
Focus Area: Water Management

Overview

This project aims towards improving potable water access and supply for the benefit and socio-economic wellbeing of inhabitants based on scientific data and recommendation on sustainable exploitation, development, and management of groundwater resources in the Awka Capital Territory by using Vertical electrical sounding (VES), Electromagnetic (EM) and Electrical Resistivity Tomography (ERT) techniques to interpret geo-electric sections and model to give the subsurface lithology distribution, and provide scientific data that will inform groundwater management policy decision making and improve access to potable water resources by the communities of study area.

This project was aimed at investigating the groundwater potentials and aquifer vulnerability in select rural communities using geological and geophysical field data. Locals in the study area rely mainly on groundwater for their needs. Most groundwater exploitation schemes fail due to poor development. Data for proper groundwater development was therefore needed.

Approach

This project was aimed at investigating the groundwater potentials and aquifer vulnerability. The objectives included establishing the presence, spatial distribution, and depth to, and thickness of aquiferous units. Also, producing aquifer depth, properties, thickness, distribution, and vulnerability maps for sustainable groundwater resources management. The transfer of this knowledge and skills in sustainable groundwater resources management was to participating students and local authorities/stakeholders.

Impact

Surface geologic field mapping showed that the study area is underlain by the varied lithologies

Interpretations and modelling of the geophysical field data showed the potential of an aquifer and its depth

Hydrogeochemical analysis of groundwater samples showed that most of the parameters tested are well below / within the WHO (2011) standard

The estimated Water Quality Index (WQI) showed that the water quality in the study area was of good quality but must be conserved by relevant policies

In the build-up and execution of this project, major stakeholders in water supply development were identified for partnerships

These outcomes showed that productive aquifers existed and could be developed sustainably when guided by appropriate data, and that protection of groundwater quality must accompany development.

Next Steps

The methodology and skills employed for this project will continue to be used well into the future by the individuals of the communities for harnessing groundwater and improving water supply in the area.