@article{fdi:010086400, title = {{C}ombining stable isotope and {WQI} methods to study the groundwater quality : a case study in {E}ssaouira city, {M}orocco}, author = {{B}ahir, {M}. and {E}l {M}ountassir, {O}. and {D}hiba, {D}. and {C}hehbouni, {A}bdelghani and {C}arreira, {P}. {M}. and {E}lbiar, {H}.}, editor = {}, language = {{ENG}}, abstract = {{G}roundwater is an important water resource in arid and semi-arid regions. {T}herefore, this study aimed to assess groundwater's suitability for drinking and irrigation using the {W}ater {Q}uality {I}ndex ({WQI}) and the {I}rrigation {W}ater {Q}uality {I}ndex ({IWQI}). {T}o this end, groundwater data were collected from 58 sites in 2019 (wet season) and 61 samples in 2020 (dry season) in the {M}eskala-{O}uazzi sub-basin. {T}he {P}iper diagram showed that {C}a-{M}g-{C}l was the dominant groundwater facies type. {T}he confinement due to {COVID}-19 has significantly improved the water quality of the {M}eskala-{O}uazzi sub-basin. {I}nstead, approximately 50% of sites showed improved water quality when calculating the {WQI} and {IWQI}. {H}owever, the sodium adsorption ratio ({SAR}) showed that most samples below 10 are found in all of the examined samples, which are mostly found, indicating excellent irrigation water, and the {W}ilcox diagram depicted 20.14% of samples lying in the unsuitable region. {S}table isotopes (delta {O}-18 and delta {H}-2) of groundwater reveal that local precipitation is the main source of recharge. {H}owever, groundwater recharge is affected by the evaporation process due to the different geological conditions caused by topographic differences in the study area. {T}he present study is useful for proper planning and managing water resources available for consumption and irrigation.}, keywords = {{E}ssaouira {B}asin ; {IWQI} ; {WQI} ; {G}roundwater quality ; {COVID}-19 ; {S}table isotope ; {MAROC} ; {ZONE} {SEMIARIDE} ; {ESSAOUIRA} {BASSIN}}, booktitle = {}, journal = {{SN} {A}pplied {S}ciences}, volume = {4}, numero = {11}, pages = {317 [22 p.]}, ISSN = {2523-3963}, year = {2022}, DOI = {10.1007/s42452-022-05165-y}, URL = {https://www.documentation.ird.fr/hor/fdi:010086400}, }