large wood transport
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Hydrology ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 21
Author(s):  
Elisabetta Persi ◽  
Gabriella Petaccia ◽  
Stefano Sibilla ◽  
Roberto Bentivoglio ◽  
Aronne Armanini

An advection-diffusion model is proposed to simulate large wood transport during high flows. The mathematical model is derived from the wood mass balance, taking into consideration both the wood mass concentration and the log orientation, which affects log transport and, most importantly, wood accumulation. Focusing on wood mass transport, the advection-diffusion equation is implemented in a hydrodynamic model to provide a one-way coupled solution of the flow and of the floating wood mass. The model is tested on a large series of flume experiments, involving at least 30 logs and different control parameters (flow Froude number, log length, diameter, release point). The validation through the experimental data shows that the proposed model can predict the correct displacement of the most probable position of the logs and to simulate with a sufficient accuracy the planar diffusion of the wooden mass. Transversal wood distribution is more accurate than the streamwise one, indicating that a higher control on the longitudinal diffusion needs to be implemented.



2017 ◽  
Vol 17 (11) ◽  
pp. 2053-2058 ◽  
Author(s):  
Diego Ravazzolo ◽  
Luca Mao ◽  
Bruno Mazzorana ◽  
Virginia Ruiz-Villanueva

Abstract. Large wood transported during extreme flood events can represent a relevant additional source of hazards that should be taken into account in mountain environments. However, direct observations and monitoring of large-wood transport during floods are difficult and scarce. Here we present a video of a flood characterised by multiple phases of large-wood transport, including an initial phase of wood-laden flow rarely described in the literature. Estimations of flow velocity and transported wood volume provide a good opportunity to develop models of large-wood-congested transport.





2017 ◽  
Author(s):  
Diego Ravazzolo ◽  
Luca Mao ◽  
Bruno Mazzorana ◽  
Virginia Ruiz-Villanueva

Abstract. Large wood transported during extreme flood events can represent a relevant additional source of hazards that should be taken into account in mountain environments. However, direct observation and monitoring of large wood transport during floods are difficult and scarce. Here we present a video of a flood characterized by multiple phases of large wood transport, including an initial phase of wood-laden flow, rarely described in literature. Estimations of flow velocity and transported wood volumes provide a good opportunity for developing models of large wood congested transport.



Author(s):  
Elisabetta Persi ◽  
Gabriella Petaccia ◽  
Stefano Sibilla


Geomorphology ◽  
2016 ◽  
Vol 272 ◽  
pp. 21-31 ◽  
Author(s):  
Virginia Ruiz-Villanueva ◽  
Bartłomiej Wyżga ◽  
Joanna Zawiejska ◽  
Maciej Hajdukiewicz ◽  
Markus Stoffel


Author(s):  
Virginia Ruiz-Villanueva ◽  
Bartłomiej Wyżga ◽  
Joanna Zawiejska ◽  
Paweł Mikuś ◽  
Hanna Hajdukiewicz ◽  
...  


2015 ◽  
Vol 51 (12) ◽  
pp. 10065-10077 ◽  
Author(s):  
S. L. Davidson ◽  
L. G. MacKenzie ◽  
B.C. Eaton


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