@article{fdi:010073633,
  title = {{G}roundwater evolution and mean water age inferred from hydrochemical and isotopic tracers in a tropical confined aquifer},
  author = {{V}illegas, {P}. and {P}aredes, {V}. and {B}etancur, {T}. and {T}aupin, {J}ean-{D}enis and {T}oro, {L}. {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he coastal confined aquifer in the {G}ulf of {U}raba ({C}olombia) is an important water source for the banana agro-industry as well as for urban and rural communities. {H}owever, the main processes controlling recharge and mixing in the aquifer are still poorly understood. {H}ydrochemical analyses and stable isotope monitoring were conducted to (a) determine groundwater recharge origin, mean groundwater age, and the main processes governing groundwater chemistry and the potential mixing of marine water and the influence of diffusive processes from the two surrounding aquitard layers. {H}ydrochemical data indicate that the main processes affecting the dissolved chemical composition include cation exchange, dissolution of carbonated and {CO}2, and silicate weathering. {O}-18 and {H}-2 compositions combined with {C}-14 data highlight the differences in climatic conditions between the recharge zone and the confined section of the aquifer, which is close to the {A}tlantic {O}cean. {G}roundwater samples with {C}-14 ages from recent to 28,300years {BP} show a depleted isotopic trend ranging from -6.43 parts per thousand to -9.14 parts per thousand in {O}-18 and from -43.2 parts per thousand to -65.7 parts per thousand in {H}-2. {T}he most depleted {O}-18 and {H}-2 compositions suggest a cooler recharge climate than the current conditions (corresponding to the last glacial period of the late {P}leistocene). {D}epleted {C}-13 values in the total dissolved inorganic carbon indicate the existence of organic material oxidation processes within the geologic formation. {T}hese results can be used or transferred to enhance groundwater modelling efforts in other confined coastal aquifers of {S}outh {A}merica where scarcity of long-term monitoring data limits water resources planification under a changing climate.},
  keywords = {{C}olombia ; confined coastal aquifer ; isotope and geochemical hydrology ; mean groundwater ages ; recharge areas and groundwater flow ; {COLOMBIE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{H}ydrological {P}rocesses},
  volume = {32},
  numero = {14},
  pages = {2158--2175},
  ISSN = {0885-6087},
  year = {2018},
  DOI = {10.1002/hyp.13160},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073633},
}