@article{fdi:010079391,
  title = {{I}sotopic characterisation and dating of groundwater recharge mechanisms in crystalline fractured aquifers : example of the semi-arid {B}anabuiu watershed ({B}razil)},
  author = {{K}reis, {M}. and {T}aupin, {J}ean-{D}enis and {P}atris, {N}icolas and {M}artins, {E}. {S}. {P}. {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ustainable groundwater management implies a good knowledge of recharge processes, especially in areas with water deficit, like the semi-arid region of {B}anabuiu watershed ({C}eara {S}tate, {N}ortheast of {B}razil). {I}n this zone, phreatic aquifers consist of {P}recambrian crystalline fractured reservoirs characterised by a high spatial anisotropy, both in terms of hydrodynamics and water quality. {T}his study implemented a multi-tracer approach ({O}-18,{H}-2,{C}-14,{H}-3, {CFC}, {SF}6), combined with hydrodynamic data (i.e. groundwater levels) to identify the groundwater recharge origin and the recharge mechanisms, and to estimate the groundwater residence time. {A}t the basin scale, hydrodynamic data and local observations indicated the high reactivity of aquifers to precipitation and suggested that infiltration processes occur mostly through preferential infiltration zones. {S}table isotope data showed a major contribution of evaporated surface water in the recharge process from many artificial or natural ponds. {G}roundwater residence time determination highlighted the spatio-temporal heterogeneity of flow path organisation within aquifers, with variable contributions between fast vertical flow (present-day end-member; 15-85 %) and a slower horizontal flow (old end-member <1960), underlining the vulnerability of aquifers to present-day environmental stress or pollution.},
  keywords = {{A}ge dating ; {B}razil ; carbon-14 ; crystalline aquifers ; groundwater ; recharge ; hydrogen-2 ; hydrogen-3 ; isotope hydrology ; multitracer approach ; oxygen-18 ; semi-arid ; stable isotopes ; {BRESIL} ; {ZONE} {SEMIARIDE} ; {CEARA} {ETAT} ; {BANABUIU}},
  booktitle = {},
  journal = {{I}sotopes in {E}nvironmental and {H}ealth {S}tudies},
  volume = {56},
  numero = {5-6},
  pages = {418--430},
  ISSN = {1025-6016},
  year = {2020},
  DOI = {10.1080/10256016.2020.1797275},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079391},
}