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    <abstract>Un échantillonnage intensif de la pluie, de l'eau gravitaire dans le sol et dans le thalweg a été réalisé sur l'un des petits bassins versants en forêt primaire de la Piste Saint-Elie (Guyane). Une décomposition de l'hydrogramme de crue, basée sur le traçage isotopique et géochimique de l'eau des compartiments susceptibles d'alimenter la crue, a été réalisée afin de dissocier la crue en écoulement issu des différentes couches du sol : flux rapide (couche superficielle), flux ralenti (couche de profondeur intermédiaire) et flux lent (couche plus profonde). L'eau du sol (sub-surface, zones intermédiaires et profondes) joue un rôle significatif dans le marquage géochimique de l'eau qui participe à la crue. Après avoir appliqué certaines hypothèses qui semblent raisonnables, un modèle de contribution à plusieurs composantes permet d'expliquer la variation temporelle des traceurs isotopiques et géochimiques de l'eau de la crue. (Résumé d'auteur)</abstract>
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      <topic>EAU DU SOL</topic>
      <topic>CRUE</topic>
      <topic>COMPOSITION CHIMIQUE</topic>
      <topic>ISOTOPE</topic>
      <topic>ELEMENT EN TRACE</topic>
      <topic>ECOULEMENT</topic>
      <topic>CYCLE HYDROLOGIQUE</topic>
      <topic>ZONE FORESTIERE</topic>
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        <title>L'hydrologie tropicale : géosciences et outil pour le développement : mélanges à la mémoire de Jean Rodier</title>
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