Abstract
An analysis of channel changes of the Toce River (Northern Italy) was carried out with the main aim of identifying the trajectories of channel adjustments. A first phase consisted of a general characterization of the catchment and a division of the river into homogeneous reaches. A systematic analysis of topographic maps and aerial photographs was then carried out using a Geographic Information Systems. The analysis of channel changes showed a progressive reduction of channel width through time. Width adjustments were intense along the upstream braided or wandering reaches, while decreased along the downstream single-thread reaches. Downstream the town of Pieve Vergonte, between 1954 and 1988 (period of maximum local industrial activity), channel narrowing was significant, varying in a range of several meters. The present riparian portions derived from vegetation encroachment of alluvial surfaces before channel narrowing are the preferential sources of sediment delivery from lateral mobility.
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References
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Rinaldi, M., Teruggi, L.B., Colombo, F., Groppelli, B. (2015). Trajectories of Channel Adjustments of the Toce River (Northern Italy). In: Lollino, G., Arattano, M., Rinaldi, M., Giustolisi, O., Marechal, JC., Grant, G. (eds) Engineering Geology for Society and Territory - Volume 3. Springer, Cham. https://doi.org/10.1007/978-3-319-09054-2_64
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DOI: https://doi.org/10.1007/978-3-319-09054-2_64
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