GIS morphometric indicators for the analysis of sediment dynamics in mountain basins |
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| Authors: | Lorenzo Marchi Giancarlo Dalla Fontana |
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| Institution: | (1) CNR IRPI, Corso Stati Uniti 4, Padova, 35127, Italy;(2) Department of Land and AgroForest Environments, University of Padova, Via dell Università 16, Legnaro, 35020, Italy |
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| Abstract: | Watershed management and headwater reconstruction programs require a reliable knowledge of sediment dynamics. Geographical Information Systems (GIS) provide the framework for the implementation of different complex techniques for the assessment of shallow landsliding and erosion processes in mountain basins. This paper presents some morphometric indicators aimed at erosion and sediment delivery analysis. The proposed indicators can be easily derived from medium to fine resolution Digital Elevation Models (DEM). Applications conducted in Eastern Italian Alps have shown the adequateness of the proposed approach to address erosion and sediment-related problems. The analysis considered the classification of sediment source areas with regard to their activity, the comparison between drainage basins having different morphological characteristics and the topographic control on sediment transport capacity, with a particular attention to the identification of channel reaches characterised by a low sediment transport capacity. |
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| Keywords: | Digital elevation model Sediment dynamics Sediment source Morphometric indicator Basin ruggedness |
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