@article{fdi:010081030, title = {{GIS}-based assessment of aquifer vulnerability using {DRASTIC} model and stable isotope : a case study on {E}ssaouira basin}, author = {{E}l {M}ountassir, {O}. and {O}uazar, {D}. and {B}ahir, {M}. and {C}hehbouni, {A}bdelghani and {C}arreira, {P}. {M}.}, editor = {}, language = {{ENG}}, abstract = {{G}roundwater in the present study is defined as a sensitive contamination of fresh water to various pollutants that are made by human or natural elements. {T}he research sought to measure the vulnerability of groundwater in the semi-arid regions and to identify sites where protection is likely needed by way of examining the resources relative to the sources of pollutants in the {M}eskala-{K}rimat sub-basin by using the {DRASTIC} model in the {G}eographic {I}nformation {S}ystem ({GIS}) environment. {T}he {DRASTIC} index resulting from the groundwater modeling that ranges between 114 and 191 were classified into three categories: low vulnerability which signifies 1.7% confidence level, moderate vulnerability which signifies 14.7% confidence level, and high vulnerability which signifies 83.7% confidence level. {A}nalyzing this approach disclosed the electrical conductivity from the upstream part increased compared with the downstream part of the study area due to susceptibility to the high mineralization and leaching of {T}idzi {D}iapir. {I}n addition, the groundwater flow remained in the same direction from northeast to northwest and from northeast to southwest during the four campaigns 2007, 2018, 2019, and 2020. {S}table isotope ({H}-2 and {O}-18) measurements indicate that the {A}tlantic rainfall is continuously recharging the watershed recharge areas. {A}nd so, the low values of tritium ({H}-3) in the groundwater signify that the fresh water in the {C}enemano-{T}uronien aquifer is old. {T}he present study proved that {DRASTIC} modeling using {GIS} is an effective technique in managing and protecting the vulnerable groundwater.}, keywords = {{M}eskala-{K}rimat sub-basin ; {E}ssaouira ; {D}rastic ; {I}sotopes ; {T}ritium ; {MAROC} ; {ESSAOUIRA} {BASSIN} ; {MESKALA} ; {TIDZI} ; {ZONE} {SEMIARIDE}}, booktitle = {}, journal = {{A}rabian {J}ournal of {G}eosciences}, volume = {14}, numero = {4}, pages = {321 [21 p.]}, ISSN = {1866-7511}, year = {2021}, DOI = {10.1007/s12517-021-06540-6}, URL = {https://www.documentation.ird.fr/hor/fdi:010081030}, }