The transport of wood material in rivers has been the subject of various studies in recent years. Most research has focused on the ecological and geomorphologic role of wood, its recruitment processes and spatial distribution in streams. In this study, we focused on wood transport dynamics, and we have developed a numerical model to simulate wood transport coupled with a two-dimensional (2D) hydrodynamic model. For this purpose, wood drag forces were incorporated as additional source terms into the shallow water equations, which are solved together with wood transport by using the finite volume method. This new tool has been implemented as a computational module into ‘Iber’, a 2D hydraulic simulation software. The new module analyzes the initial motion threshold of wood based on the balance of forces involved in the wood's movement, and computes the position and velocity of differently shaped logs using a kinematic approach. The method also considers the interaction between the logs themselves and between the logs and the channel walls or boundaries. Flume experiments were used in a straight channel with obstructions to validate the model's capacity to accurately reproduce the movement of floating logs.
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Research Article|
March 12 2014
Two-dimensional numerical modeling of wood transport
Virginia Ruiz-Villanueva;
1Department of Research and Geoscientific Prospective, Geological Survey of Spain, Instituto Geológico Minero de España (IGME), Ríos Rosas 23, E-28003 Madrid, Spain
E-mail: [email protected]; [email protected]
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Ernest Bladé;
Ernest Bladé
2Flumen Research Institute, Universitat Politècnica de Catalunya – Barcelona Tech, Jordi Girona 1-3, (D1), E-08034, Barcelona, Spain
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Martí Sánchez-Juny;
Martí Sánchez-Juny
2Flumen Research Institute, Universitat Politècnica de Catalunya – Barcelona Tech, Jordi Girona 1-3, (D1), E-08034, Barcelona, Spain
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Belén Marti-Cardona;
Belén Marti-Cardona
2Flumen Research Institute, Universitat Politècnica de Catalunya – Barcelona Tech, Jordi Girona 1-3, (D1), E-08034, Barcelona, Spain
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Andrés Díez-Herrero;
Andrés Díez-Herrero
1Department of Research and Geoscientific Prospective, Geological Survey of Spain, Instituto Geológico Minero de España (IGME), Ríos Rosas 23, E-28003 Madrid, Spain
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José María Bodoque
José María Bodoque
3Facultad de Ciencias Ambientales y Bioquímica, Universidad de Castilla – La Mancha, Avda. Carlos III s/n, E-45071 Toledo, Spain
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Journal of Hydroinformatics (2014) 16 (5): 1077–1096.
Article history
Received:
February 28 2013
Accepted:
February 06 2014
Citation
Virginia Ruiz-Villanueva, Ernest Bladé, Martí Sánchez-Juny, Belén Marti-Cardona, Andrés Díez-Herrero, José María Bodoque; Two-dimensional numerical modeling of wood transport. Journal of Hydroinformatics 1 September 2014; 16 (5): 1077–1096. doi: https://doi.org/10.2166/hydro.2014.026
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