@article{fdi:010091419,
  title = {{T}he importance of mountain-block recharge in semiarid basins : an insight from the {H}igh-{A}tlas, {M}orocco},
  author = {{B}ouimouass, {H}. and {T}weed, {S}arah and {M}arc, {V}. and {F}akir, {Y}. and {S}ahraoui, {H}. and {L}eblanc, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ountain-block recharge ({MBR}), consisting of groundwater inflows from the mountain block into adjacent alluvial aquifers, can be an important source of recharge for groundwater in (semi)arid areas. {T}he present study examined {M}ountain-{B}lock {R}echarge ({MBR}) from the {M}arrakech {H}igh-{A}tlas {M}ountain to the adjacent {H}aouz alluvial aquifer in {M}orocco, using environmental tracers and endmember mixing analysis ({EMMA}). {T}he influence of the isotopic altitude effect on rainfall (?0.18 ? per 100 m for ?18{O}) in the mountains allows a distinction between groundwater originating from rainfall recharged at different altitudes. {M}ean ?18{O} values are heavier at lower altitudes (?5.1 ?; < 1000 m.a.s.l), compared to medium altitudes (?6.4 ?; 1000-1500 m.a.s.l), and higher altitudes (?7.6 ?; >2000 m.a.s.l). {S}table isotopes suggest a mountain-aquifer connectivity via two {MBR} flow pathways: a regional {MBR} from lower-medium altitudes, and a localised {MBR} from the foothills. {I}n addition, chloride highlighted a potential origin via regional groundwater flowpath from the lower-medium altitudes where important evaporite deposits are present. {F}urthermore, samples dominated by lower-medium altitude recharge displayed lower 3{H} content, suggesting longer residence times typical of {MBR}, where mountain front recharge prevails. {EMMA} illustrated {MBR} contributions ranging from under 1 % to 98 %, varying by proximity to irrigated areas and streams. {E}astern areas showed more significant regional {MBR} influence than the western due to existing faults, acting as hydrogeologic barriers to {MBR}. {T}hese findings are crucial in defining groundwater recharge origins for protection strategies in water-stressed semi-arid regions. {U}nderstanding {MBR} dynamics and connectivity between mountain blocks and aquifers is pivotal for sustainable groundwater resource management.},
  keywords = {{MAROC} ; {HAUT} {ATLAS} {DE} {MARRAKECH}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {631},
  numero = {},
  pages = {130818},
  ISSN = {0022-1694},
  year = {2024},
  DOI = {10.1016/j.jhydrol.2024.130818},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091419},
}