Author(s): Zen Simone; Perona Paolo
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Keywords: No Keywords
Abstract: In this work we investigated the influence of riparian vegetation dynamics on the temporal fluctuation of river channel width during river short-term temporal evolution. A statistical analysis is conducted to explore the time signal of channel width oscillation generated from the application of the bio -morphodynamic model proposed by Zen et al. [1] for different vegetation types, i. e. fast or low biomass grow, under periodic or random sequence of floods. The application of the autocorrelation function to the generated signals revealed a tendency of the vegetation to correlate the signal associated to a random disturbance. In order to further explore such dynamics, we proposed a dynamical model that describes vegetation and bank dynamics in a symmetric river cross-section where the two banks migrate laterally of the same quantity. The simplify model allowed us to investigate the conditions for which vegetation and bank dynamics reach an equilibrium and further provide evidence of the increasing in signal correlation due to higher influence of vegetation dynamics on river processes.
Year: 2018