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Long-term water quality monitoring of the Sejnane reservoir in northeast Tunisia

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Abstract

The Sejnane reservoir in northeast Tunisia provides drinking and irrigation water. Long-term water quality monitoring data including precipitation, evaporation, temperature, pH, conductivity, dissolved oxygen, turbidity, total suspended solids, major anions and cations, fluoride, BOD5, NO3 , NO2 , NH4 +, P tot, fecal coliform bacteria, boron and heavy metals (Fe, Zn, Cu, Ni, Pb, Cr and Cd) are reported. The appropriateness for irrigation was estimated by the SAR and Na percentage and the water quality assessed using the Canadian Water Quality Index as good to excellent, which confirmed its suitability for drinking, aquatic life and irrigation purposes.

Résumé

Le barrage Sejnane, situé au nord est de la Tunisie, a pour objectif de contribuer à la satisfaction des besoins en eau potable et l’irrigation des terres agricoles. L’article présente un suivi à long terme des paramètres de la qualité des eaux: précipitation, évaporation, température, pH, conductivité, oxygène dissous, turbidité, matières en suspension, Na+, K+, Ca2 +, Mg2+, Cl, F, SO =4 , HCO3 , BOD5, NO3 , NO2 , NH4 +, P tot, coliformes fécaux, bore et métaux lourds (Fe, Zn, Cu, Ni, Pb, Cr et Cd). La compilation de ces résultats a été réalisée avec une technique d’analyse multivariable pour la réduction des données. La convenance pour l’irrigation a été évaluée par les indices SAR et le pourcentage de sodium. Cette étude démontre la conformité des eaux aux règles de potabilité, de vie aquatique et d’irrigation. La qualité de l’eau a été évaluée via l’Indice canadien de qualité d’eau (WQI) et qualifiée de bonne à excellente.

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Acknowledgments

The authors would like to thank the staff of technicians (Laboratory of geochemistry—Ben Arous) for their assistance in the acquisition of samples and chemical analysis, Samia ZOUABI and specially Tahar ALOUI for their assistance in the preparation of this manuscript.

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Correspondence to Besma Zouabi Aloui.

Appendix 1

Appendix 1

See Table 5.

Table 5 Selected water quality variables of some reservoirs in Tunisia compared to international guidelines for drinking-water, aquatic life and irrigation uses

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Zouabi Aloui, B., Gueddari, M. Long-term water quality monitoring of the Sejnane reservoir in northeast Tunisia. Bull Eng Geol Environ 68, 307–316 (2009). https://doi.org/10.1007/s10064-009-0186-1

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