@article{fdi:010085400, title = {{A}ssessment of groundwater quality and the main controls on its hydrochemistry in a changing climate in {M}orocco ({E}ssaouira {B}asin)}, author = {{E}l {M}ountassir, {O}. and {B}ahir, {M}. and {C}hehbouni, {A}bdelghani and {D}hiba, {D}. and {E}l {J}iar, {H}.}, editor = {}, language = {{ENG}}, abstract = {{G}roundwater is essential for both water supply and environmental conservation, especially in semi-arid and desert areas. {M}anaging groundwater resources requires a thorough understanding of groundwater characteristics and dynamics. {T}he hydrogeochemical properties and evolution of groundwater in the {E}ssaouira synclinal basin in northwest {M}orocco were studied in this research, with 105 water samples collected in 2009, 2017, 2018, and 2019. {T}he {W}ater {Q}uality {I}ndex ({WQI}) and {I}rrigation {W}ater {Q}uality {I}ndex ({IWQI}) were developed to determine groundwater quality for consumption and irrigation purposes. {T}he chemical evolution of groundwater is mainly dominated by evaporite, mineral carbonate dissolutions, and cation exchange. {C}ontamination by nitrates is particularly severe in agricultural and tourist areas. {T}he {WQI} of the 2019 campaign showed that 6.7% of groundwater samples are unsuitable for drinking; 76.7% are poor quality water; and 13.3% are very poor-quality water; while only 3.3% are drinkable. {A}ccording to {IWQI}, the total study area has been split into 50% (good), 43.3% (bad), and 6.6% (unfit), respectively, and no excellent groundwater areas have been identified. {T}herefore, the water is suitable for agriculture but must be treated for drinking. {T}he presence of evaporation and maritime intrusion and the contribution of recent precipitations to aquifer recharging were demonstrated by stable isotope content.}, keywords = {{WQI} ; groundwater quality ; {E}ssaouira basin ; {IWQI} ; hydrogeochemical ; processes ; irrigation ; stable isotope ; climate change ; {MAROC} ; {ESSAOUIRA} {BASSIN}}, booktitle = {}, journal = {{S}ustainability}, volume = {14}, numero = {13}, pages = {8012 [31 p.]}, year = {2022}, DOI = {10.3390/su14138012}, URL = {https://www.documentation.ird.fr/hor/fdi:010085400}, }