Introduction: It is expected that as the populations and economies of coastal regions grow and the climate changes, there will be a greater demand for public water supply. The exploitation of available water sources will therefore increase in order to meet these increasing demands, thus all persons responsible for the supply, supervision and regulation of public services must ensure the correct use and exploitation of the hydraulic resources. Because surface water has been severely contaminated and diminished in some areas and treatment of this water is costly, some utility providers consider groundwater exploitation to be an effective source. Aquifers are the primary storage and transport structures for groundwater in all regions, including inland and coastal. What differentiates an inland aquifer from a coastal aquifer is that the latter interacts with the ocean both above and below ground. Coastal freshwater aquifers eventually recharge to the ocean level and, therefore, interactions can cause the freshwater aquifer to be affected by the ocean as well as its saltwater aquifer. Since inappropriate use of coastal aquifers could result in irreversible damage up to complete deterioration and inability to use an aquifer due to public safety concerns, it is necessary to develop methodologies and strategies for more appropriate uses of water resources in a way that is in harmony with the physical and socio-economic environment. Modeling tools to quantitatively measure the available groundwater supply will facilitate the creation of management plans that will enable more correct management in order to stabilize economic growth, population growth and ensure that it will live up to sustainability and availability. ... middle of paper ......ter to replace fresh water.5. Dissolution of groundwater from evaporated materials incorporated into the stratigraphic column. Intense pumping can cause leaching of salts contained in areas of low permeability.6. Movement of groundwater contained in deeper aquifers. The upward movement of groundwater containing high salt content from deep confined aquifers to shallower aquifers can cause an increase in salinity.7. Infiltration of wastewater or irrigation water for domestic or industrial use infused with dissolved salts.8. Infiltration of brackish water from estuaries or artificial canals can be a source of salinity. In this case, there may be 3 types of water interacting in the same aquifer.9. Brackish water, brine or chlorinated water can be trapped in a geological medium and can be mixed with water closer to the surface, under appropriate conditions..