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Évaluation de la contamination des eaux par les pratiques agricoles
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ISBN10: 6209084567
ISBN13: 9786209084560
Publisher: Editions Universitaires Europeennes
Published: Oct 17 2025
Pages: 148
Weight: 0.46
Height: 0.34 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786209084560
Publisher: Editions Universitaires Europeennes
Published: Oct 17 2025
Pages: 148
Weight: 0.46
Height: 0.34 Width: 6.00 Depth: 9.00
Language: French
Cette étude évalue l'impact des pratiques agricoles sur la contamination des eaux de la plaine des Triffa (Maroc oriental). L'intensification de l'agriculture, l'irrigation massive et l'usage excessif d'engrais et de pesticides ont conduit à une dégradation notable de la qualité des eaux souterraines et superficielles. Les analyses physico-chimiques montrent des concentrations de nitrates comprises entre 2,32 et 153 mg/L, dépassant dans 73 % des puits la norme OMS de 50 mg/L. Les eaux présentent également une salinité accrue, variant des classes C3S1 à C5S3, témoignant d'une sodicité croissante nuisible aux cultures sensibles. Les analyses bactériologiques révèlent une contamination quasi généralisée par les coliformes et streptocoques fécaux. Malgré une évolution chimique marquée, le faciès des eaux demeure principalement chloruré sodique et chloruro-sulfaté calcique et magnésien. Ce travail souligne la nécessité d'une gestion raisonnée des intrants agricoles pour préserver la qualité des ressources hydriques de la région.
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