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Nonrigid, Nonsubmerged, Vegetative Roughness on Floodplains
Abstract
Individual pine and cedar tree saplings and branches were used to model the resistance to flow in a water flume for nonsubmerged and nonrigid vegetation to determine the amount that streamlining decreases the drag coefficient and reduces the momentum absorbing area. Currently, vegetation on floodplains is commonly assumed to behave as rigid roughness that can lead to large errors in the relationships between velocity and drag force. This presents a basic fluid mechanics problem. An extreme variation of roughness with depth of flow can result due to a large increase in the momentum absorbing area in nonsubmerged vegetation as depth is increased. This deems all the available roughness equations (which generally are based on relative roughness approach) useless for this application. In this paper a dimensional analysis, supported by experimental results, is developed to obtain a relationship between roughness conditions (i.e., density and flexural rigidity) and flow conditions (i.e., velocity and depth) for floodplains and vegetative zones of natural waterways.
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Citations
Cited by
Corenblit, D., Tabacchi, E., Steiger, J., & Gurnell, A. M. (2007) · Earth-Science Reviews · doi:10.1016/j.earscirev.2007.05.004 · Cited by 721
Impacts of riparian vegetation on hydrological processes
Tabacchi, E., Lambs, L., Guilloy, H., Planty-Tabacchi, A.-M., Muller, E., & D�camps, H. (2000) · Hydrological Processes · doi:10.1002/1099-1085(200011/12)14:16/17<2959::aid-hyp129>3.0.co;2-b · Cited by 485
On inducing equations for vegetation resistance
Baptist, M. J., Babovic, V., Rodríguez Uthurburu, J., Keijzer, M., Uittenbogaard, R. E., Mynett, A., & Verwey, A. (2007) · Journal of Hydraulic Research · doi:10.1080/00221686.2007.9521778 · Cited by 484
Flow resistance of flexible and stiff vegetation: a flume study with natural plants
Järvelä, J. (2002) · Journal of Hydrology · doi:10.1016/s0022-1694(02)00193-2 · Cited by 406
Chen, H., Song, B., Zhang, H., Yan, J., Zhao, Y., & Zhao, X. (2026) · Journal of Hydraulic Engineering · doi:10.1061/jhend8.hyeng-14398 · Cited by 3
Metadata
- Authors
- Fathi-Maghadam, M., & Kouwen, N.
- Venue
- Journal of Hydraulic Engineering
- Published
- 1997-01
- Volume
- 123
- Issue
- 1
- Pages
- 51-57
- ISSN
- 0733-9429 (ISSN-L)
- 1943-7900
- DOI
- 10.1061/(asce)0733-9429(1997)123:1(51
- OpenAlex
- W2126459061
- Cited by
- 227
- References
- 0
- FWCI
- 3.74
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fathi-Maghadam, M., & Kouwen, N. (1997). Nonrigid, Nonsubmerged, Vegetative Roughness on Floodplains. Journal of Hydraulic Engineering. https://doi.org/10.1061/(asce)0733-9429(1997)123%3A1(51
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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