@article {6924,
	title = {Using vadose-zone water stable isotope profiles for assessing groundwater recharge under different climatic conditions},
	journal = {Hydrological Sciences Journal},
	volume = {66},
	number = {10},
	year = {2021},
	abstract = {Considering three sites under different climate conditions (arid, semi-arid, and subhumid), this study aims to use the vadose-zone water stable isotope profiles to estimate the groundwater recharge rate. High-resolution vertical subsurface soil sampling along the vadose zone of the investigated sites was conducted. The collected samples were analysed to determine their stable isotope ratios (δ2H and δ18O) that were used along with the piston displacement method to estimate recharge. Annual recharge rates of 0.2\% ({\textpm} 0.1\%), 2.5\%, and 18\% of the total annual precipitation were obtained for the arid, semi-arid, and subhumid sites, respectively. Recharge rates at the semi-arid and subhumid sites are comparable to those previously estimated using water balance-based methods. The recharge rate at the arid site is lower than that previously estimated for that site using the water budget-based method, revealing difficulties in applying the piston displacement method under an arid regime.},
	url = {https://www.tandfonline.com/doi/full/10.1080/02626667.2021.1957479},
	author = {Boumaiza, Lamine and Chesnaux, Romain and Drias, Tarek and Walter, Julien and Stumpp, Christine}
}
@article {62688,
	title = {Using vadose-zone water stable isotope profiles for assessing groundwater recharge under different climatic conditions},
	journal = {Hydrological Sciences JournalHydrological Sciences Journal},
	volume = {66},
	number = {10},
	year = {2021},
	month = {2021},
	pages = {1597-1609},
	abstract = {
	Considering three sites under different climate conditions (arid, semi-arid, and subhumid), this study aims to use the vadose-zone water stable isotope profiles to estimate the groundwater recharge rate. High-resolution vertical subsurface soil sampling along the vadose zone of the investigated sites was conducted. The collected samples were analysed to determine their stable isotope ratios (δ2H and δ18O) that were used along with the piston displacement method to estimate recharge. Annual recharge rates of 0.2\% ({\textpm} 0.1\%), 2.5\%, and 18\% of the total annual precipitation were obtained for the arid, semi-arid, and subhumid sites, respectively. Recharge rates at the semi-arid and subhumid sites are comparable to those previously estimated using water balance-based methods. The recharge rate at the arid site is lower than that previously estimated for that site using the water budget-based method, revealing difficulties in applying the piston displacement method under an arid regime.

},
	isbn = {0262-6667},
	url = {https://www.tandfonline.com/doi/abs/10.1080/02626667.2021.1957479?journalCode=thsj20},
	author = {Boumaiza, Lamine and Chesnaux, Romain and Drias, Tarek and Walter, Julien and Stumpp, Christine}
}
@article {6925,
	title = {Identifying groundwater degradation sources in a Mediterranean coastal area experiencing significant multi-origin stresses},
	journal = {Science of The Total Environment},
	volume = {746},
	year = {2020},
	abstract = {This study investigates the multiple contamination sources of a coastal Mediterranean aquifer in northeastern Algeria that is bordered by two rivers and neighboring densely populated areas. Hydrogeochemical and isotopic groundwater characterization is carried out, including the analyses of major elements, water\&nbsp;stable isotopes\&nbsp;δ2H-H2O and δ18O-H2O, and stable isotopes of nitrate δ15N-NO3\&nbsp;and δ18O-NO3, and then integrated into the history of land use over the study area. Groundwater nitrate concentrations ranging from 1.6 to 235\&nbsp;mg/L with a median value of 69\&nbsp;mg/L are evidence of the degradation of groundwater quality induced by\&nbsp;anthropogenic sources. The combined of δ15N-NO3\&nbsp;and δ18O-NO3\&nbsp;ratios showed that nitrate in groundwater is attributable to (i) the uncontrolled development of inadequate private sanitation systems over the study area, and (ii) the unsafe application of animal manure to fertilize crops. Very active\&nbsp;saltwater intrusion\&nbsp;is confirmed by several hydrogeochemical indicators. Interestingly, the intrusion mechanism appears to be more complex than a direct intrusion from the Mediterranean Sea. During the high-water period, saltwater intrusion may also originate from the two rivers bordering the aquifer, via upstream migration of seawater through the river mouths. The heavier ratios in δ2H-H2O and δ18O-H2O of surface water collected from the rivers suggest that water from the Mediterranean Sea is mixing with water in the rivers. Multi-source contamination not only contributes to complex chemical reactions within the aquifer, but also contributes, via the\&nbsp;cumulative effect\&nbsp;of the various sources, to affecting large parts of the study area. The present study may serve as a warning to the effect that historical land-use practices may exert seriously deleterious impacts on groundwater quality and greatly limit conditions for the sustainable management of Mediterranean coastal areas.},
	url = {https://www.sciencedirect.com/science/article/abs/pii/S004896972034732X},
	author = {Boumaiza, Lamine and Chesnaux, Romain and Drias, Tarek and Walter, Julien and Huneau, Fr{\'e}d{\'e}ric and Garel, Emilie and Knoeller, Kay and Stumpp, Christine}
}
@article {63088,
	title = {Identifying groundwater degradation sources in a Mediterranean coastal area experiencing significant multi-origin stresses},
	journal = {Science of The Total EnvironmentScience of The Total Environment},
	volume = {746},
	year = {2020},
	month = {2020},
	pages = {141203},
	isbn = {0048-9697},
	author = {Boumaiza, Lamine and Chesnaux, Romain and Drias, Tarek and Walter, Julien and Huneau, Fr{\'e}d{\'e}ric and Garel, Emilie and Knoeller, Kay and Stumpp, Christine}
}
