@article{fdi:010064164,
  title = {{C}aract{\'e}risation g{\'e}ochimique et bact{\'e}riologique des nappes d'une r{\'e}gion {\`a} climat tropical sec au centre {S}ud de {M}adagascar = {G}eochemical and bacteriological characterization of aquifers in a dry tropical region in south central {M}adagascar},
  author = {{Z}akaria, {M}. {G}. and {T}aupin, {J}ean-{D}enis and {R}anaivoarisoa, {A}. and {R}obison, {L}. {R}.},
  editor = {},
  language = {{FRE}},
  abstract = {{T}he district of {B}etroka, subjected to a dry tropical climate, experiences severe water resource problems. {F}or many inhabitants, this situation results in the consumption of water of very bad quality in terms of both its physical chemistry and bacteriology. {T}herefore, to improve this situation, the {M}alagasy government planned to undertake a programme of drinking water supply and purification in rural areas (a project of 350 drillings), as part of which the present work has been carried out, to obtain water for human consumption of acceptable quality in terms of bacteriology and mineralization. {T}he microbiological study of the groundwater of the district of {B}etroka confirmed the bacteriological purity because it does not contain bacteria of fecal origin. {T}he hydrochemical study revealed different processes leading to the mineralization of the groundwater in relation to: (a) the ascent of the saline water of deep origin along the transverse fractures of the major shearing of {B}etroka, along the normal faults at the origin of the graben of the {M}angoky, and of the domain of the massif in dome and basin of the intrusive complex of {I}anakafy; (b) the dissolution of the aerosols and sea spray deposited, dissolved by the rain and integrated into the aquifers; and (c) the interaction between meteoric water and groundwater with mineral rocks (scapolite, phlogopite, biotite, hornblende, etc.) could also contribute to the strong mineralization.},
  keywords = {zone of shearing ; dry tropical climate ; groundwater ; {M}adagascar ; drinking water supply ; hydrochemistry ; salinity ; contamination ; bacteriology ; {MADAGASCAR} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{H}ydrological {S}ciences {J}ournal = {J}ournal des {S}ciences {H}ydrologiques},
  volume = {60},
  numero = {4},
  pages = {746--759},
  ISSN = {0262-6667},
  year = {2015},
  DOI = {10.1080/02626667.2014.932052},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064164},
}