A mixing-length model for predicting vertical velocity distribution in flows through emergent vegetation |
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| Authors: | PAWE? M ROWI?SKI JANUSZ KUBRAK |
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| Institution: | 1. Institute of Geophysics, Polish Academy of Sciences , ul. Ksi?cia Janusza 64, 01-452, Warsaw, Poland E-mail: pawelr@igf.edu.pl;2. Faculty of Environmental Science , Warsaw Agriculture University SGGW , ul. Nowoursynowska 166, 02-787, Warsaw, Poland |
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| Abstract: | Abstract The vertical profiles of streamwise velocities are computed on flood plains vegetated with trees. The calculations were made based on a newly developed one-dimensional model, taking into account the relevant forces acting on the volumetric element surrounding the considered vegetation elements. A modified mixing length concept was used in the model. An important by-product of the model is the method for evaluating the friction velocities, and consequently bed shear stresses, in a vegetated channel. The model results were compared with the relevant experimental results obtained in a laboratory flume in which flood plains were covered by simulated vegetation. |
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| Keywords: | flood plains vertical velocity distributions emergent vegetation shear velocities shear stresses Prandtl hypothesis velocity measurements |
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