ABSTRACT
Groundwater evaluation studies involve several well known procedures in hydrogeological sciences, such as the application of the continuity equation under specific boundary conditions according to the characteristics of the flow domain. The continuity equation is applied on a flow domain where groundwater flow is assumed to take place in a specific time lapse and in a three dimension field. The chemical and physical characteristics of the groundwater flow provide information on the interaction between groundwater and the geological material that is occupied by an active flow system. In a strict sense, the vertical limits that bound and control saturated groundwater flow are referred to those placed by the geological framework where the bottom part is the basement rock and the top part of the
groundwater flow domain is represented by the potentiometric surface; lateral boundaries are those of the regional flow path travelling from the top of the foremost watershed (see sketch inset in figure 1) to its discharge area.
