Distribución de la contaminación por nitrato en las aguas subterráneas de la cuenca del río Manol (Alt Empordà, NE España)

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Preventing nitrate pollution in ground water requires an appropriate knowledge of regional hydrogeological flow systems, and their influence upon the migration of solutes. In this paper, we describe the hydrological features of the Manol River basin (Alt Empordà, NE Spain). It consists of a two unit system with distinct hydraulic head that define a downward vertical flux, and therefore, a larger nitrate pollution of the deepest layers. Intensive use of pig manure as fertilizer and the actual ground water withdrawal rates enhances nitrate occurrence, and a lost of the quality of ground water resources ​
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