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Influence de l oued cheliff sur l écosystème marin
Paperback
Series: Omn.Univ.Europ.
Literary CriticismEnvironmental Studies
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ISBN10: 6131589666
ISBN13: 9786131589669
Publisher: Omniscriptum
Published: Feb 28 2018
Pages: 108
Weight: 0.37
Height: 0.26 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786131589669
Publisher: Omniscriptum
Published: Feb 28 2018
Pages: 108
Weight: 0.37
Height: 0.26 Width: 6.00 Depth: 9.00
Language: French
Neuf Wilayas du pays rejettent leurs eaux usées dans l'Oued Cheliff qui les achemine vers le Nord pour les déverser dans la Baie de Mostaganem. Les polluants comptent des substances azotées, phosphorées et soufrées, de la matière en suspension (organique et minérale). Selon le suivi scientifique réalisé entre octobre 2004 et avril 2005, les polluants détectés ont des conséquences négatives sur la faune et la flore marine de la baie de Mostaganem, notamment dans la zone de l'embouchure du Cheliff. Les énormes quantités de particules solides qui se trouvent dans l'eau empêchent la pénétration de la lumière solaire, pour cela, le développement de la flore est réduit au strict minimum dans la zone de l'embouchure comme le confirment les immersions d'observation du benthos marin. Cette pauvreté végétale implique par conséquent une très faible diversité de la faune. De ce fait, le suivi scientifique a mis en évidence l'influence de l'Oued Cheliff sur l'écosystème marin, notamment les effets négatifs sur le phytoplancton qui présente une réelle perturbation quant à son abondance.
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