Les précipitations intenses en Bretagne: l'influence possible des mutations paysagères sur les tendances d'évolution récentes

Vincent Dubreuil 1 Florence Huon 1 Claire Lejeune 1
1 LETG - Rennes - Littoral, Environnement, Télédétection, Géomatique
LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554
Abstract : The study of heavy rains (more than 20 mm per a day) for two stations in Brittany (Brest and Rennes) shows important differences between monthly repartition and recent evolution. For Brest, heavy rains occur more frequently in winter and in Rennes it appears more often in summer. But, since 1970, the volume given by those heavy rains increases in Rennes while it seems to be stable in Brest. As the number of days of thunderstorms is not increasing, it could mean that precipitations are locally intensified by regional landuse and landcover. In fact it could be the result of the recent extension of urban areas, of maize and the elimination of hedges in the basin of Rennes.
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Journal articles
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https://hal.archives-ouvertes.fr/hal-00319181
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Submitted on : Friday, September 5, 2008 - 9:32:49 PM
Last modification on : Friday, July 5, 2019 - 12:42:03 PM

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Vincent Dubreuil, Florence Huon, Claire Lejeune. Les précipitations intenses en Bretagne: l'influence possible des mutations paysagères sur les tendances d'évolution récentes. Norois, Presses universitaires de Rennes, 1996, 43 (170), pp.395-406. ⟨10.3406/noroi.1996.6718⟩. ⟨hal-00319181⟩

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