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- W2807231750 abstract "The influence of rigid vegetation on the longitudinal dispersion coefficient in a compound open channel was examined using an image processing technique. To simulate floodplain vegetation, cylinders of 5 mm diameter were attached to the floodplain surface. Potassium permanganate solution was used as a conservative tracer. Instantaneous velocity components were measured using particle image velocimetry. The results showed that, compared with non-vegetated conditions, floodplain vegetation decreased the depth-averaged longitudinal velocity and maximum tracer concentration by up to 83% and 12·5%, respectively. It was also found that the magnitude of the longitudinal dispersion coefficient, K, increased with the relative flow depth, D r (the ratio of the floodplain to main channel flow depth). Furthermore, the value of K increased by up to 39·3% for vegetated tests compared with non-vegetated tests. Moreover, the results were compared with several previous empirical equations and the most appropriate equation for prediction of K in compound channels with partly vegetated floodplain was found to be that proposed by Fischer in 1975." @default.
- W2807231750 created "2018-06-13" @default.
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- W2807231750 date "2019-10-01" @default.
- W2807231750 modified "2023-10-15" @default.
- W2807231750 title "Flow and longitudinal dispersion in channel with partly rigid floodplain vegetation" @default.
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- W2807231750 doi "https://doi.org/10.1680/jwama.17.00079" @default.
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