Signal pluie et traçage par les isotopes stables en Méditerranée occidentale. Exemple de la région avignonnaise (Sud-Est de la France)

Signal pluie et traçage par les isotopes stables en Méditerranée occidentale. Exemple de la région avignonnaise (Sud-Est de la France)

Signal pluie et traçage par les isotopes stables en Méditerranée occidentale. Exemple de la région avignonnaise (Sud-Est de la France)

Abstract

Rainwater tracing using environmental isotopes in the western Mediterranean region. Case of the region of Avignon (Southeast France). An isotopic survey of rainwater has been carried out in Avignon during the two periods 1978–1989 and 1997–1998. This monthly study allowed observation of the evolution of rainwater isotopic content during the year and its lack of relation with meteorological parameters, as well as definition of the local relationship between oxygen-18 and deuterium. Moreover, a comparison of the weighted mean isotopic value of rainwater (–6,21‰) with groundwater values provides a first approach to the estimation of the mean regional input function. © 2000 Académie des sciences / Éditions scientifiques et médicales Elsevier SAS.

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