We focus on the measurement of the topography and bathymetry in flume-models of braided rivers. To this aim, an innovative measurement system is adopted. It consists of a laser-ultrasonic sensor and can survey the bed elevation under flowing water. This measurement system was used to profile a flume transect with a frequency of 2 minutes, without stopping the water discharge. By this technique, the topography and the bathymetry of a single transect was continuously acquired in 3 braided rivers generated with the same experimental set-up. The main results are: (i) the quantification of the variability of the number of channels and number of active channels; (ii) the assessment of the probability distribution of some key hydraulic and morphodynamic parameters; and (iii) the verification of the repeatability of results obtained from flume-models of braided rivers.
Hydraulics of braided river dynamics. Insights from flume experiments / Vesipa, Riccardo; Camporeale, Carlo; Ridolfi, Luca. - In: E3S WEB OF CONFERENCES. - ISSN 2267-1242. - ELETTRONICO. - 40:(2018), pp. 0202001-0202008. (Intervento presentato al convegno 9th International Conference on Fluvial Hydraulics, River Flow 2018 tenutosi a Lyon nel 2018) [10.1051/e3sconf/20184002020].
Hydraulics of braided river dynamics. Insights from flume experiments
Vesipa, Riccardo;Camporeale, Carlo;Ridolfi, Luca
2018
Abstract
We focus on the measurement of the topography and bathymetry in flume-models of braided rivers. To this aim, an innovative measurement system is adopted. It consists of a laser-ultrasonic sensor and can survey the bed elevation under flowing water. This measurement system was used to profile a flume transect with a frequency of 2 minutes, without stopping the water discharge. By this technique, the topography and the bathymetry of a single transect was continuously acquired in 3 braided rivers generated with the same experimental set-up. The main results are: (i) the quantification of the variability of the number of channels and number of active channels; (ii) the assessment of the probability distribution of some key hydraulic and morphodynamic parameters; and (iii) the verification of the repeatability of results obtained from flume-models of braided rivers.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2726613
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