Abstract

Population growth and socio-economic development have contributed to the degradation of the waters in the Oued Djedra watershed. This study aims to identify the degree of pollution of the waters and sediments in this basin. Seven sampling points were chosen, distributed along the Oued Djedra and its tributaries, to assess the impact of urban, industrial, and agricultural discharges on water and sediment quality. Sampling was conducted over a period from November 2020 to December 2021 to account for seasonal variability in hydrological conditions.
The results revealed two dominant geochemical facies: calcium chloride and calcium sulfate. They also indicated nitrogen and phosphorus pollution, particularly affecting the waters of Oued Akiba, where anthropogenic pressures are evident. The analysis of water suitability for irrigation revealed significant differences; some waters are of good quality and can be used without risk, while others require prior treatment, and another group is entirely unusable. 14.3% of the analyzed water samples showed cadmium levels exceeding the required standards for drinking water, and significant copper and lead levels were noted, though remaining below maximum values. Enrichment in Cd (85.7%), Cu (82.1%), Zn (28.6%), and Pb (25%) was observed, indicating sediment contamination within the Oued Djedra watershed.
Partial triadic analysis (PTA) confirmed the presence of organic and metallic pollution, particularly pronounced in the waters of Oued Akiba and downstream of Oued Djedra.
Keywords: Pollution, irrigation, sediments, PTA, watershed, Wadi Djedra.

Information

Item Type:	Thesis
Divisions:	» Laboratory sciences and technical water and environment » Faculty of Science and Technology
ePrint ID:	5436
Date Deposited:	2025-06-19
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/5436

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