L‘analisi morfometrica del reticolato idrografico come mezzo per l’individuazione di sollevamenti recenti : una applicazione al T. Banna (Piemonte)

Morphometric analysis of drainage pattern as a way of detecting recent uplifting and its application to the T. Banna (Piemonte)

Abstract

The extent to which morphometric analysis of the drainage pattern of a watercourse affords a way of detecting deformation occurring during the evolution of a particular basin is examined. Use was made of MELTON’S ratios, in which the value of the exponent varies in function of the presence or absence of uplifting, in an investigation of the drainage pattern of the T. Banna following reconstruction of its geodynamic evolution. The data furnished by this ratio were sufficiently consistent with the differences in evolution that had emerged from the geological study. The evidence in each case indicated that the uplifting which occurred in the Upper Pleistocene-Holocene primarly involved the S and E portions of the basin. This correspondence of the findings thus points to the soundness of drainage pattern analysis as a means of detecting recent uplifting.