Geomorphological classification of fluvial systems from G.I.S. Tools

This paper gathers a valid method for the geomorphological classification of fluvial systems, as well as its development with Geographic Information Systems (G.I.S.). The characterization and reach-making of the fluvial network is based on valley geomorphology, streambed slope and channel geomorphology. A process of simplification is necessary to achieve an applicable classification, which is explained with an example (Cabe river, Lugo, Spain). 14 hydromorphological types have been differentiated. There is a clear dominance of alluvial sinuous channels in valleys of moderate confinement and wide valley-floor. The incorporation of G.I.T. (Geographic Information Technologies) tools in fluvial geomorphology has marked a substantial change in the analysis of processes and classifications, as far as its versatility and its possibilities obtaining precise and fast information. Likewise, in the last years the geomorphology begins to settle as the central point of many projects about restoration and comprehension of the natural dynamics of fluvial systems, the reason why is basic to establish guidelines and methodologies that help in this task.