ANÁLISIS DE LA CALIDAD GENERAL DEL AGUA SUPERFICIAL EN LA CUENCA HIDROGRÁFICA DEL JÚCAR: PERIODO 2000-2009/General quality of surface water analysis in the Júcar watershed: 2000-2009 period

This paper analyzes the quality of surface water in the Confederación Hidrográfica del Júcar, over the period 2000-2009. First, in a wide range of sampling points and at different times, the values for the General Quality Index (GQI) have been determined from observed data on the physical and chemical parameters defining the index. The results have allowed to evaluate the quality of surface water, regardless of their possible use. Subsequently, the study has been carried out to model the behavior of the general index based on their most important parameters and other control variables, by using panel data analysis. This methodology allows to consider the specific individual effect of each sampling point with more flexibility than classical regression methods. [PUBLICATION ABSTRACT]