@article{fdi:010063119,
  title = {{H}ydro-geochemical processes in the {C}omplexe {T}erminal aquifer of southern {T}unisia : an integrated investigation based on geochemical and multivariate statistical methods},
  author = {{A}mmar, {F}. {H}. and {C}hkir, {N}. and {Z}ouari, {K}. and {H}amelin, {B}runo and {D}eschamps, {P}ierre and {A}igoun, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{H}ydrochemical data from a total of 104 groundwater samples were used to investigate the main factors and mechanisms that control the chemistry of groundwaters in the {C}omplexe {T}erminal ({C}l') aquifer of {C}hott region in southern {T}unisia. {M}ultivariate statistical techniques combining {H}ierarchical {C}luster {A}nalysis ({HCA}) and {P}rincipal {C}omponent {A}nalysis ({PCA}) were applied to the dataset of 12 physicochemical parameters (i.e. p{H}, {T} degrees, depth, {N}a+, {K}+, {C}a2+, {M}g2+, {HCO}3- {NO}3-, {C}l-, {SO}42-, and {TDS}). {T}he {HCA} using {W}ard's method and squared {E}uclidean distance classified the parameters into four clusters based on their dissimilarities. {T}he application of {PCA} resulted in two factors explaining 64.25% variance. {G}eochemical methods combined with {HCA} and {PCA} confirm that groundwater chemistry is not controlled by the different lithological fades of the aquifer, but by the presence of evaporates randomly distributed in the basin. {A}lthough stable isotope data ({H}-2 and {O}-18) of some groundwater are consistent with a slight modern recharge, {C}l' groundwaters are mostly depleted bearing witness to the recharge of the aquifer system occurred under different climatic conditions than present. {T}he stable isotopic composition of these paleowaters which all lie to the right of the local meteoric water line also indicates more pronounced evaporation of rainfall during the recharge process than during present-day conditions.},
  keywords = {{CT} southern {T}unisia ; {G}eochemistry ; {HCA} ; {PCA} ; {S}table isotopes ; {TUNISIE}},
  booktitle = {},
  journal = {{J}ournal of {A}frican {E}arth {S}ciences},
  volume = {100},
  numero = {},
  pages = {81--95},
  ISSN = {1464-343{X}},
  year = {2014},
  DOI = {10.1016/j.jafrearsci.2014.06.015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063119},
}