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Volume 23 (1) - 2000

COLICA A.

Analysis of the genesis and evolution of calanco morphology in an experimental area of Paiccia (Radicofani, Siena, Italy)

Pages 21-32

Abstract

A study of calanco morphology in the area of Paiccia (Radicofani, Siena, Italy) was conducted in the period 1989-1996, based on the evaluation of the geological, morphological, pedological, tectonic and climatic aspects. The data collected, along with the examination of the calanco morphology, carried out by a series of photographic surveys, have clearly indicated that a calanco is formed by dynamic landforms such as rills, gullies, crowns and mudflows. The analysis of the evolution of these landforms allowed us to identify the self-feeding and genesis mechanisms of the calanco morphology. The self-feeding is essentially related to the development of these landforms. The development in turn is mainly linked to the climatic conditions and to the presence of perched watertables. The genesis seems to be due to the evolution of the rill hydrographic pattern.

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