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              <p>Lorsque vous aurez réalisé ce TD vous serez capable 1) D'identifier les zones émettrices de pollution azotée à l'échelle d'un bassin versant. Pour cela vous devrez : - Estimer la lixiviation de l'azote à l'échelle de la parcelle en prenant en compte trois composantes (évaluation de la sensibilité du milieu au transfert d'azote vers la profondeur, évaluation du transfert d'azote par type de rotation, évaluation du transfert d'azote en fonction des pratiques de fertilisation excédentaires). - Quantifier les risques de transfert de nitrate à l'échelle du bassin versant en intégrant l'abattement possible par les zones humides efficaces vis-à-vis de la dénitrification. 2) Proposer des leviers d'action à mettre en œuvre par les gestionnaires du territoire (agriculteurs, collectivités) pour limiter les pertes : - L'analyse des indicateurs vous permettra d'identifier les leviers ; - Vous pourrez proposer des actions aménagement de l'espace rural ou amélioration des pratiques à mettre en œuvre sur le bassin versant.</p>
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