Advanced search
1 file | 2.54 MB Add to list

An approximate solution to the flow field on vegetated intertidal platforms: applicability and limitations

Author
Organization
Abstract
Tidal wetland evolution is governed by interactions between topography, vegetation, and the flow field. Aiming to provide an appropriate hydrodynamic tool within a long-term geomorphic model of vegetated wetlands, we describe an approximate procedure to model the depth-averaged flow field on vegetated intertidal platforms. The procedure is tested by a qualitative comparison with laboratory experiments and quantitatively comparing with a numerical model, focusing on the influence of spatial variations in friction on the flow field. Overall, satisfactory comparisons are obtained. Nevertheless, some limitations of the approach are apparent. These are discussed in the light of the model assumptions. We analyze the impact of the observed limitations on the ability of the approximate solution to describe the morphodynamic evolution of the bed elevation. This is performed by evaluating the changes in the bed elevation after one tidal cycle on the intertidal platform based on flow velocities obtained with a numerical model and those of the simplified procedure. It is found that the bed evolution on the platform is reasonably described with the approximate solution, even though the accumulation of sediment is underestimated near the watershed divide by the approximate model. Taking into account the computationally economic character of the approximate procedure, the analysis indicates that the model provides a suitable tool to investigate the long-term morphodynamic evolution of tidal wetlands.
Keywords
LOAD TRANSPORT, SEDIMENT TRANSPORT, TIDAL NETWORKS, MARSH GROWTH, SEA-LEVEL, MODEL, EVOLUTION

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 2.54 MB

Citation

Please use this url to cite or link to this publication:

MLA
Van Oyen, Tomas, et al. “An Approximate Solution to the Flow Field on Vegetated Intertidal Platforms: Applicability and Limitations.” JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, vol. 119, no. 8, 2014, pp. 1682–703, doi:10.1002/2013JF003064.
APA
Van Oyen, T., Carniello, L., D’Alpaos, A., Temmerman, S., Troch, P., & Lanzoni, S. (2014). An approximate solution to the flow field on vegetated intertidal platforms: applicability and limitations. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 119(8), 1682–1703. https://doi.org/10.1002/2013JF003064
Chicago author-date
Van Oyen, Tomas, L Carniello, A D’Alpaos, Stijn Temmerman, Peter Troch, and S Lanzoni. 2014. “An Approximate Solution to the Flow Field on Vegetated Intertidal Platforms: Applicability and Limitations.” JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 119 (8): 1682–1703. https://doi.org/10.1002/2013JF003064.
Chicago author-date (all authors)
Van Oyen, Tomas, L Carniello, A D’Alpaos, Stijn Temmerman, Peter Troch, and S Lanzoni. 2014. “An Approximate Solution to the Flow Field on Vegetated Intertidal Platforms: Applicability and Limitations.” JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 119 (8): 1682–1703. doi:10.1002/2013JF003064.
Vancouver
1.
Van Oyen T, Carniello L, D’Alpaos A, Temmerman S, Troch P, Lanzoni S. An approximate solution to the flow field on vegetated intertidal platforms: applicability and limitations. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE. 2014;119(8):1682–703.
IEEE
[1]
T. Van Oyen, L. Carniello, A. D’Alpaos, S. Temmerman, P. Troch, and S. Lanzoni, “An approximate solution to the flow field on vegetated intertidal platforms: applicability and limitations,” JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, vol. 119, no. 8, pp. 1682–1703, 2014.
@article{5668029,
  abstract     = {{Tidal wetland evolution is governed by interactions between topography, vegetation, and the flow field. Aiming to provide an appropriate hydrodynamic tool within a long-term geomorphic model of vegetated wetlands, we describe an approximate procedure to model the depth-averaged flow field on vegetated intertidal platforms. The procedure is tested by a qualitative comparison with laboratory experiments and quantitatively comparing with a numerical model, focusing on the influence of spatial variations in friction on the flow field. Overall, satisfactory comparisons are obtained. Nevertheless, some limitations of the approach are apparent. These are discussed in the light of the model assumptions. We analyze the impact of the observed limitations on the ability of the approximate solution to describe the morphodynamic evolution of the bed elevation. This is performed by evaluating the changes in the bed elevation after one tidal cycle on the intertidal platform based on flow velocities obtained with a numerical model and those of the simplified procedure. It is found that the bed evolution on the platform is reasonably described with the approximate solution, even though the accumulation of sediment is underestimated near the watershed divide by the approximate model. Taking into account the computationally economic character of the approximate procedure, the analysis indicates that the model provides a suitable tool to investigate the long-term morphodynamic evolution of tidal wetlands.}},
  author       = {{Van Oyen, Tomas and Carniello, L and D'Alpaos, A and Temmerman, Stijn and Troch, Peter and Lanzoni, S}},
  issn         = {{2169-9003}},
  journal      = {{JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE}},
  keywords     = {{LOAD TRANSPORT,SEDIMENT TRANSPORT,TIDAL NETWORKS,MARSH GROWTH,SEA-LEVEL,MODEL,EVOLUTION}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{1682--1703}},
  title        = {{An approximate solution to the flow field on vegetated intertidal platforms: applicability and limitations}},
  url          = {{http://dx.doi.org/10.1002/2013JF003064}},
  volume       = {{119}},
  year         = {{2014}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: