Delineation:

This involves the characterization of the existing conditions so that people can have an adequate understanding of the hydrogeological conditions and a detailed spatial characterization of the saltwater interface (Hussain et al., 2019) . In this report, all data obtained were gotten through direct (hydrogeochemical parameters).

Monitoring:

It involves a monitor program that can monitor conditions and provide a reasonable accurate assessment of the changes in the saltwater interface (Barlow, 2003; EPA, 2023) . This can be achieved by accurately selecting the location of monitoring wells and providing sufficient screens length to monitor the changes in the saltwater interface (Ashcroft & Mubashar, 2011) .

Modeling:

It is the use of Numerical modeling to predict long-term behavior of saltwater interface in response to changes in rainfall, water use and other activities or actions, which affect groundwater (Ashcroft & Mubashar, 2011) . The numerical modeling that is often used is Finite Element Model and Finite definite Model. They are both good at solving complicated boundary value problems through discretization (Ashcroft & Mubashar, 2011) .

Modification:

Based on the results provided in the other three steps. There must be a modification of the pumping and control runoff or re-injection of wastewater to maintain the freshwater head to prevent further encroachment of saltwater (Hussain et al., 2019) .