Saline intrusion represents one of the most persistent environmental problems at the worldwide coasts; this problem has arisen due to overexploitation of coastal aquifers, sea-level rise accelerated by climate change and changes on the hydrogeological cycle.Typically, changes on the hydrological cycle are associated to urbanization of recharge areas and changes on the natural surface and subsurface water bodies induced by anthropogenic interventions.Because of the accelerated growth of the population and the increased touristic activities this perturbation has called the attention of the scientific community and more recently of the decision makers.In the international context, one can find many efforts to define strategies to control and mitigate the effects of the saline intrusion on coastal aquifers, however at Colombia only some initiatives has been reported that intended to understand conceptually the phenomena.In this work, a numerical model is presented to simulate saline intrusion that allows understanding quantitatively the advance of the seawater into the aquifer.Such a model may serve as starting point towards the design of water management strategies at the Colombian coasts.In order to show the applicability of numerical models the Morrosquillo aquifer case is used.Different scenarios were studied using hypothetical conditions.