▪ Analyse the dynamic movement of seawater/fresh water interfaces using geophysical electrical resistivity techniques and its impacts on heterogeneous formation of the island.
▪ Define a safe setback distance from the highwater mark for safe exploitation of brackish water
▪ Generate maps showing the extent of seawater intrusion
• Piezometric level and Location of boreholes
To what extent is pumping of groundwater along the coastal zones increasing the rate of seawater ingress in basaltic aquifers which are in dynamic contact with the sea?
A four electrodes geophysical electrical resistivity meter was used to map the thickness of the different subsurface layers at various sites around the coastal zone of the island.