Flow interaction with dynamic vegetation patches: Implications for biogeomorphic evolution of a tidal landscape

Vandenbruwaene, W., Temmerman, S., Bouma, T.J., Klaassen, P.C., De Vries, M.B., Callaghan, D.P., Van Steeg, P., Dekker, F., Van Duren, L. A., Martini, E., Balke, T., Biermans, G., Schoelynck, J. and Meire, P. (2011) Flow interaction with dynamic vegetation patches: Implications for biogeomorphic evolution of a tidal landscape. Journal of Geophysical Research F: Earth Surface, 116 F1: . doi:10.1029/2010JF001788

Author Vandenbruwaene, W.
Temmerman, S.
Bouma, T.J.
Klaassen, P.C.
De Vries, M.B.
Callaghan, D.P.
Van Steeg, P.
Dekker, F.
Van Duren, L. A.
Martini, E.
Balke, T.
Biermans, G.
Schoelynck, J.
Meire, P.
Title Flow interaction with dynamic vegetation patches: Implications for biogeomorphic evolution of a tidal landscape
Journal name Journal of Geophysical Research F: Earth Surface   Check publisher's open access policy
ISSN 0148-0227
Publication date 2011-01-01
Year available 2011
Sub-type Article (original research)
DOI 10.1029/2010JF001788
Open Access Status Not yet assessed
Volume 116
Issue F1
Total pages 13
Place of publication Hoboken, NJ United States
Publisher Wiley-Blackwell Publishing, Inc.
Language eng
Subject 1904 Performing Arts and Creative Writing
1908 Geophysics
Abstract Feedback between vegetation growth, water flow, and landform is important for the biogeomorphic evolution of many landscapes, such as tidal marshes, alluvial rivers, and hillslopes. While experimental studies often focus on flow reduction within static homogeneous vegetation, we concentrate on flow acceleration around and between dynamically growing vegetation patches that colonize an initially bare landscape, with specific application to Spartina anglica, a pioneer of intertidal flats. Spartina patches were placed in a large-scale flow facility of 16 × 26 m, simulating the growth of two vegetation patches by increasing the patch diameter (D = 1-3 m) and decreasing the interpatch distance (d = 2.3-0 m). We quantified that the amount of flow acceleration next to vegetation patches, and the distance from the patch where maximum flow acceleration occurs, increases with increasing patch size. In between the patches, the accelerated flow pattern started to interact as soon as D/d ≥ 0.43-0.67. As the patches grew further, the flow acceleration increased until D/d ≥ 6.67-10, from which the flow acceleration between the patches was suppressed, and the two patches started to act as one. These findings are in accordance with theory on flow around and between nonpermeable structures; however, the threshold D/d values found here for permeable vegetation patches are higher than those for nonpermeable structures. The reported flow interactions with dynamic vegetation patches will be essential to further understanding of the larger-scale biogeomorphic evolution of landscapes formed by flowing water, such as tidal flats, floodplain rivers, and hillslopes. Copyright
Keyword Geosciences, Multidisciplinary
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 022441
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
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