The study area is located in the south of the state of Hidalgo and comprises the municipalities of Pachuca, Mineral de la Reforma, Zapotlán de Juárez, Villa de Tezontepec, Tolcayuca, Tizayuca and part of San Agustín Tlaxiaca and Zempoala Figure 1, with a total surface area of 964.45 km2 Figure 1.
La zona de estudio se ubica al sur del estado de Hidalgo y comprende a los municipios Pachuca, Mineral de la Reforma, Zapotlán de Juárez, Villa de Tezontepec, Tolcayuca, Tizayuca y parte de San Agustín Tlaxiaca y Zempoala Figura 1; con un área total de 964.45 km Figura 1.