Geomorphic characteristics of dryland distributive systems

  • Paolo Billi International Platform for Dryland Reserach and Education, Tottori University
Keywords: distributive systems, ephemeral streams, fans, deltas, drylands

Abstract

Dryland distributive systems include different types of depositional bodies: distributary systems, alluvial fans, fan deltas, lacustrine deltas and sea deltas. Geomorphic data of 81 distributive systems from different arid lands in the world were selected and simple geomorphic parameters such as distributive system area, average length of radius, average slope and apex angle, were measured. The data analysis indicate that these typologies have different characteristics, though the most distinctive groups include fans, deltas and distributary system, the geomorphic characteristics of which are constantly intermediate between the two former groups. The results seem to confirm the hypothesis of De Chant et al. (1999) that the shape of distributive systems is mainly controlled by sediment diffusion, channel processes and accommodation space characteristics.

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Published
2021-12-11
How to Cite
Billi, P. (2021). Geomorphic characteristics of dryland distributive systems. Revista De Geomorfologie, 23(1), 5-16. https://doi.org/10.21094/rg.2021.101
Section
Articles