La remontée des eaux dans la région du Souf : une menace sur un écosystème oasien

Kadri, Salima Rayene; Chaouche, Sabine

doi:10.4000/emam.1554

Cited by 6 publications

(10 citation statements)

References 2 publications

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“…These fluctuations result from a shift in the hydraulic balance between water supply and drainage, a shift intensified in recent years by the apparition of mechanical pumping. The main risk for the gardens is roots asphyxia and salinisation (Idder et al, 2014; Kadri & Chaouche, 2018). Within these horizons, the more oxidised units appear to be preferably enriched in Ni, Cr, Fe and Mg, whereas the others are enhanced in Al, Ti, K and Na.…”

Section: Results and Interpretationsmentioning

confidence: 99%

An oasis soil reference collection for the identification and study of ancient cultivated soils in arid environments (Oasis of Masafi, United Arab Emirates)

et al. 2021

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Oasis soils result from the combined action of natural and anthropic processes, and thus constitute valuable systems for the understanding of human–environment trajectories over the millennia. The present research aims to develop the study of ancient oasis soils by identifying proxies to detect past agricultural practices. Ten reference pits were dug in Masafi, in both cultivated plots (irrigated plots with palm trees/fruit trees/cereals; manure/ashes/carbonates) and abandoned ones. Bulk sediment samples were analysed for geochemistry/pedo‐sedimentary studies: inductively coupled plasma‐optical emission spectrometry, loss on ignition, pH, electrical conductivity, grain size and magnetic susceptibility. This multiproxy approach enabled the creation of a soil typology of oasis agricultural modes. Irrigation and liming lead to salinisation, particularly in a B‐horizon. Manure creates a hortic horizon, enriched in P and Zn. Ashes can be detected with a simultaneous increase of magnetic and salinity values. Soils in plots with fruit trees/cereals are not distinguishable from those with palm monoculture. Weathering was identified on the basis of the enrichment in Al, Ti, K Na, Ni, Cr and Fe, whereas proxies of ancient practices seem to be preserved after 15 years of abandonment. As leaching processes appear to be limited to the first 50 cm, the durability of soil signatures depends on how they were buried.

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Section: Results and Interpretationsmentioning

confidence: 99%

An oasis soil reference collection for the identification and study of ancient cultivated soils in arid environments (Oasis of Masafi, United Arab Emirates)

et al. 2021

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“…As a result, hundreds of farmers lost their agricultural lands, which were flooded. Kadri & Chaouche (2018) reported that of 9700 Ghouts in the region, only 2355 Ghouts remain. On the other hand, many areas were affected by salinization (Figure 4) (Khezzani & Bouchemal 2018b, Pulido-Bosch et al 2018.…”

Section: Figure 1 Study Area Locationmentioning

confidence: 99%

“…On the other hand, many areas were affected by salinization (Figure 4) (Khezzani & Bouchemal 2018b, Pulido-Bosch et al 2018. Unfortunately, all the measures taken by local authorities at that time were ultimately unable to solve the problem (Kadri & Chaouche 2018). sandy soil that is very poor in organic matter (Bouselsal & Ouarekh 2021).…”

Section: Figure 1 Study Area Locationmentioning

confidence: 99%

“…Therefore, as an urgent solution, the authorities considered adopting a biological drainage system to reduce the water table level, especially in severely damaged areas like Chott, Sidi Mestour and Nezla neighbourhoods. This afforestation process was accomplished under a green belt project (Kadri & Chaouche 2018;Khezzani 2018).…”

Section: The Green Belt Project and Its Consequences In Souf Oasismentioning

confidence: 99%

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Eucalyptussp. as biodrainage system in an arid region: A case study from the Souf oasis (south Algeria)

Khezzani¹,

Khechekhouche²,

Zaater³

et al. 2022

MJEE

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Arid environments are generally characterized by water scarcity, but some anthropogenic activities or extreme weather conditions can lead to inverse results at the local or regional scales, necessitating a drainage system. This paper describes the application of biodrainage systems in the Souf oasis (Algerian Sahara) as an example of arid environments. The bad management of water resources in the Souf oasis led to rising shallow water levels that threatened the agricultural sector and urban agglomeration; so, a system of bio drainage based on Eucalyptus camaldulensis was used to resolve and correct this perturbation. The adopted bio drainage system effectively contributed to decreasing shallow water levels with other benefits such as protecting soil from saliniation and ameliorating life quality. The paper recommends that water availability for agricultural activities be considered when using biodrainage systems in arid regions with the valorisation of treated wastewater.

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“…Consequently, the increase of wastewater discharges contributes to groundwater pollution [29]. However, to meet the needs for drinking water and irrigation due to the economic and demographic development of the region, intensive pumping was applied on deep groundwater aquifers (complex terminal and continental intercalary) for different uses, but without sufficient treatment and discharge, these quantities return to the phreatic aquifer [30].…”

Section: Site Descriptionmentioning

confidence: 99%

Assessment of Complex Terminal Groundwater Aquifer for Different Use of Oued Souf Valley (Algeria) Using Multivariate Statistical Methods, Geostatistical Modeling, and Water Quality Index

Barkat

Bouaicha

Bouteraa

et al. 2021

Water

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This research aims to assess the hydrogeochemical evolution of the groundwater in Oued souf valley for drinking and irrigation purposes. To achieve this, 49 groundwater samples from the complex terminal were examined and treated concurrently with multivariate statistical methods, geostatistical modeling and the WQI (water quality index). Focusing on the physico-chemical parameters, Q mode clustering analysis detected four major water groups, where the mineralization augmented from group 1 to group 4. The hydro-chemical type was the same, Ca-Mg-Cl-SO4 for all the groups. Calcite, dolomite, anhydrite, and gypsum would be the dominant reactions with the undersaturation of evaporates minerals, based on geochemical modeling, while the carbonate minerals are precipitating. Geostatistical analysis using ordinary Kriging demonstrated the exponential semi-variogram model fitted for EC (electrical conductivity), Ca2+ (calcium), Mg2+ (magnesium), K+ (potassium), HCO3− (bicarbonate), Cl− (chloride), and SO42− (sulfate). At the same time, the rational quadratic model was the best-fitted semi-variogram model for Na+ (sodium) and NO3− (nitrate). EC, SO42−, and NO3− have a strong spatial structure, while Ca2+, Na+, K+, and HCO3− have a moderate spatial structure. Moreover, there was a weak spatial structure for Mg2+ and Cl−. The WQI shows that CT (complex terminal groundwater aquifers) are not suitable for drinking and their quality for irrigation fluctuates from excellent to moderate quality.

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La remontée des eaux dans la région du Souf : une menace sur un écosystème oasien

Cited by 6 publications

References 2 publications

An oasis soil reference collection for the identification and study of ancient cultivated soils in arid environments (Oasis of Masafi, United Arab Emirates)

An oasis soil reference collection for the identification and study of ancient cultivated soils in arid environments (Oasis of Masafi, United Arab Emirates)

Eucalyptussp. as biodrainage system in an arid region: A case study from the Souf oasis (south Algeria)

Assessment of Complex Terminal Groundwater Aquifer for Different Use of Oued Souf Valley (Algeria) Using Multivariate Statistical Methods, Geostatistical Modeling, and Water Quality Index

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