Vulnérabilité des ressources en eaux de surface du parc nationale d’El kala,Wilaya d’El Taref Extreme Nord-Est Algérien

Abstract

The present work aims to address the vulnerability of surface water to pollution due to anthropogenic pressure on this environment. For this, we have several themes: -The variables control of the ecosystem (geology, climate, relief, network ... etc). -Hydrology and the water resource. -Finally, the hydrochemistry and vulnerability of surface water by monitoring and analysis of some physicochemical parameters at the various prospected stations of the three lakes (Tonga, Oubeira, El Mellah) as well as some wadis and a dam , belonging to the complex of wetlands of the El Kala National Park which is located in the extreme northeastern Algeria. The results of the monitoring of the water quality parameters show that their spatiotemporal evolution varies from one station to another, influenced by the inflows and the losses of fresh and saline water: as for the Oubeira stations which are influenced by the contributions of wadi Messida and oued El Kebir during the floods and by the contributions of wadi Demet El Rihana to the north. The assessment of water pollution by the determination of the organic pollution index shows a moderate to high level of pollution for surface waters whose origin seems to be urban because of discharges into the wild.