Resumen de Las actividades agrícolas en el polje de Zafarraya y la evolución del contenido en nitratos en dos manantiales del acuífero de Sierra Gorda (Granada y Málaga).
L. Cherif, Antonio Pulido Bosch, Manuel López-Chicano, Ignacio Morell Evangelista, José Antonio Gámez Vintaned
The monthly nitrate content in the springs of Riofrio and Guam on the northwestern and southern edges, respectively, of the karstic aquifer of Sierra Gorda have been studied during the period February 1994 - January 1995. The mean value of the nitrates in the two springs registered 20 mg/I, tripling the mean of 6,7 mg/I for the period 1974-89. The highest contents were recorded during rainy periods, due to the hidraulic connexion between the polje of Zafarraya and the karstic aquifer. In this polje, agricultural activities covered 1500 ha. The springs of the northern edge appear to be more vulnerable to pollution than which are situated in southern part
