La surexploitation des ressources hydriques au Sahara algérien et ses conséquences sur l’environnement

Idder, Tahar; Idder, A.; Cheloufi, Hamid; Benzida, A.; Khemis, R.; Moguedet, Gérard

doi:10.1051/tsm/201305031

Cited by 3 publications

(2 citation statements)

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“…Finally, to the north, the basin is limited by Zabret Bou Noura and a massive dune field that stretches along the left bank of the Oued N'sa to northernmost Sebkha Safioune (Djidel et al 2008, Hadj Kouider et al 2019. With an average valley slope gradient of <1‰, streamflow gradients in the area are very low, resulting in low hydraulic gradients within the underlying shallow groundwater system (ONA 2004, Idder et al 2013.…”

Section: Description Of the Study Areamentioning

confidence: 99%

Effect of a hyperarid climate on groundwater salinity: A case study of the Ouargla shallow aquifer (Northern Sahara, Algeria)

2023

Archives of Environmental Protection

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Groundwater resources are typically affected by both global climate factors and anthropogenic activities. This influence is most apparent in arid and semi-arid climates of the Saharan desert. With rising temperatures and minimal precipitation, climate variability in these regions has a particularly significant and systemic impact on the chemical composition of shallow aquifer water. In this regard, our study aims to evaluate the climatic effects on groundwater in Saharan environments, using the Ouargla basin as a prime example. Water samples taken from 45 observation piezometers in our selected study area in February and June 2021 were used to assess the overall impact of inter-annual climate variations on salinity within this shallow groundwater basin. The obtained results show that groundwater located in the first three meters of shallow aquifer depth is directly influenced by surface climate. This pattern holds true for both observed seasonal periods. Stratification indices within the saturated zone were found to be positive, indicating an increase in groundwater salinity at lower depths and negative in shallower depths. This suggests a direct climate influence on this groundwater. These findings can be used to enhance sustainable development strategies in such environments, notably by quantifying salt accumulation and efficiently managing salinity exchange between saturated and vadose horizons.

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Section: Description Of the Study Areamentioning

confidence: 99%

Effect of a hyperarid climate on groundwater salinity: A case study of the Ouargla shallow aquifer (Northern Sahara, Algeria)

2023

Archives of Environmental Protection

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“…During that decade, these networks were extended to evacuate the excesses generated by the rise in the water table due to the irrational exploitation of the fossil aquifers [1][2][3]. These networks aim to keep wastewater away from homes and the urban environment, but very quickly the problem of the fate of this wastewater arises [4,5].…”

Section: Introductionmentioning

confidence: 99%

Wastewater Treatment Performance of Aerated Lagoons, Activated Sludge and Constructed Wetlands under an Arid Algerian Climate

et al. 2022

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Water pollution reduces the availability of fresh water, especially in arid areas suffering from water stress, and also adversely affects soil, vegetation and environmental processes. Wastewater treatment processes aim to reduce environmental degradation and increase water availability by improving the quality of wastewater to a standard suitable for irrigation. This paper compares the performance of three wastewater treatment processes: (i) aerated lagoon (AL), (ii) activated sludge (AS), and (iii) constructed wetland (plant beds, PB) under the arid climate of Algeria. The statistical analysis focused on the comparison between the removal rates of the physical (SS) and biological pollution (BOD5 and COD) parameters in the three stations during 8 years of operation. Obtained results show that the maximum removal rates were observed in the AS process and the minimum were in the AL process. The comparison between the removal rates for a given parameter has shown that there is a significant difference between the AL process on the one hand and the AS and PB processes on the other hand. For the last two processes, AS and PB, there is a difference, but it is not statistically significant. For the values of the parameters of wastewater leaving the three systems, results showed that there is a seasonal variation in the average values of the parameters (temperature effect) and that with the exception of orthophosphate, the values recorded are, for the most part, below the values of Algerian discharge standards, WHO standards and FAO standards.

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Gestion de l’eau d’irrigation dans le Bas-Sahara algérien : le paradoxe hydrique de la palmeraie d’Ouargla

Amrani¹

2021

Annales De Géographie

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En 1998 paraissait un article de Marc Cote, un géographe Français : « les oasis malades de trop d’eau ». Était pointé du doigt l’excédent hydrique dû aux irrigations à outrance qui résultaient de pratiques inappropriées et d’une gestion défaillante. La situation ne s’est guère améliorée depuis plus de 20 ans. Pire, la palmeraie se dégrade à cause de ce qui devait être son facteur de développement : l’eau. Nous passons en revue les logiques qui sous-tendent les modes de gestion actuels en tentant d’expliquer les raisons de tels dysfonctionnements.

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La surexploitation des ressources hydriques au Sahara algérien et ses conséquences sur l’environnement

Cited by 3 publications

References 0 publications

Effect of a hyperarid climate on groundwater salinity: A case study of the Ouargla shallow aquifer (Northern Sahara, Algeria)

Effect of a hyperarid climate on groundwater salinity: A case study of the Ouargla shallow aquifer (Northern Sahara, Algeria)

Wastewater Treatment Performance of Aerated Lagoons, Activated Sludge and Constructed Wetlands under an Arid Algerian Climate

Gestion de l’eau d’irrigation dans le Bas-Sahara algérien : le paradoxe hydrique de la palmeraie d’Ouargla

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