Modelagem do fluxo subterrâneo na bacia sedimentar costeira do baixo curso do rio Paraíba.

Abstract

The increased use of groundwater resources to meet the population on various activities, contributes to lack of it, causing crises in the supply of large cities, conflicts of use and deterioration of quality and quantity of water. This exploration has occurred disorderly and uncontrolled in some areas causing the disappearance of groundwater and surface water sources, land subsidence, loss of the ability of the aquifer and seawater intrusion in coastal aquifers. In order to manage the groundwater properly, avoiding the problems described above, it has been used applications through mathematical modeling, providing decision makers with greater reliability with respect to qualitative and quantitative aspects of these resources. The overall objective of this research is to establish a mathematical model to represent the hydrogeological behavior in part of the Sedimentary Coast of the Lower course of Paraíba River, State of Paraíba, in order to support Groundwater Management. Through application of mathematical behavior was established and simulated aquifer hydrogeological criteria for granting right of use of water resources. As a result we obtained the current diagnosis of the confined aquifer, the volume (exploitable) of the natural discharge of the subsystem, the flow rate of exploitation by wells, the interference caused by wells and saltwater intrusion into the hydrogeological subsystem under study. These results show that the modeled aquifer, is in an intense exploitation, and that measures of Water Resources must be taken to avoid compromising quality and quantitative aspects of groundwater.