Modelación de la interfaz salina de un acuífero litoral: Plana de Oropesa-Torreblanca (Castellón, España).

Autores UPV
Año
LIBRO Modelación de la interfaz salina de un acuífero litoral: Plana de Oropesa-Torreblanca (Castellón, España).

Abstract

The proper characterization of salinization due to seawater intrusion requires an appropriate hydrodynamic modeling system, not being enough the knowledge of flows to the sea - based on hydrogeological budgets, or in flow models not able to account for variable density effects. A new mathematical model of ¿Plana de Oropesa-Torreblanca¿ (groundwater body 080.110), three-dimensional and transient, is presented. It accounts for the effects of variable density flow and transport (based on SEAWAT). It is built using as initial approach previous 2D models, it comprises the water body indicated above and includes a greater spatial resolution and parameterization. Its calibration is based on transient piezometric head data and salinity measurements. Results confirm the intrusion process characterized in previous studies, and the stabilization of it due to changes in the exploitation of the system. However, average annual intrusion is estimated as nearly three times higher than it was in previous models; besides, the lateral recharge to the aquifer might be considerably higher than in previous models as inferred from the new calibration of the system. The new model is closer to the real formation conditions than previous models; thus, it can be the basic tool for long-term predictions that account for exploitation changes as well as for hydrological and sea level changes due to climate change. However, it will be necessary reconsidering some of the hydrogeological and hydrodynamic definitions on the base of future studies.