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Couverture fascicule

Pluviosité de la bordure sud-orientale du Massif Central

[article]

Année 1927 15-1 pp. 5-70

restrictedrestricted Cet article contient des illustrations pour lesquelles nous n'avons pas reçu d'autorisation de diffusion (en savoir plus)

Avant de procéder à toute mise en ligne, les responsables des revues sollicitent les auteurs d'articles et d'illustrations pour obtenir leurs autorisations. Dans cet article, la personne disposant des droits sur les illustrations a dû refuser la diffusion libre et gratuite de son travail. Nous avons donc apposé des masques permettant de dissimuler l'illustration (et donc de satisfaire la demande de l'ayant droit) et de laisser un accès libre au texte de l'article.

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Page 5

PLUVIOSITÉ DE LA BORDURE SUD-ORIENTALE DU MASSIF CENTRAL

Par A.-E. MITARD.

L'intérêt que peut offrir une étude géographique de la pluviosité n'a plus à être démontré, une assez riche littérature en la matière ayant remporté un légitime succès. Cet intérêt, variable . suivant les lieux, semble devoir être assez grand pour l'ensemble que constituent la bordure sud-orientale du Massif Central et ses abords. Un mur montagneux s'y oppose à des plaines; les influences océanique et méditerranéenne s'y combattent; la pluviosité y présente donc sur un petit espace des contrastes saisissants dans la quantité aussi bien que dans le régime, et maints facteurs de géographie physique ou humaine (travail de l'érosion, force motrice, cultures/ etc.) ne peuvent s'y expliquer que par le régime, des pluies. Enfin, une partie de la région est le théâtre des- remarquables « phénomènes torrentiels cévenols _» auxquels M. Pardé a consacré une étude approfondie dans le Recueil des Travaux de l'Institut de Géographie alpine г et dont il parle également dans sa remarquable thèse de doctorat sur le Régime du Rhône.

Les caractères fondamentaux- de la pluie dans cette contrée ont été établis par Angot quand il a publié dans les Annales du Bureau central météorologique 2 la partie relative à la région du

1 Tome VII, 1919. 8 Mémoires, 1912, tome I.

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