Print Email Facebook Twitter Flow resistance of vegetated oblique weir-like obstacles during high water stages Title Flow resistance of vegetated oblique weir-like obstacles during high water stages Author Ali, S. Uijttewaal, W.S.J. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2011-12-31 Abstract At high water stages obstacles in the floodplains of a river contribute to the flow resistance. In particular the elevated vegetated parts are expected to play an important role. The objective of this study is to estimate and parameterize the form drag due to vegetated oblique weir-like obstacles. An experimental study has been carried out in the Laboratory of Environmental Fluid Mechanics of Delft University of Technology. Measurements for energy head losses were carried out for a range of discharges and downstream water levels covering submerged and subcritical flow conditions. The Head loss due to submerged vegetated dikes has been modeled by an expansion loss form drag model. Expansion loss form drag model has been derived from one dimensional momentum conservation equation and accounts for the energy loss associated with a deceleration of the flow downstream of a sudden flow expansion. The results have been compared with experimental data. Subject oblique weir, vegetated weir, weir-like obstacles, flow resistance, floodplain resistance To reference this document use: http://resolver.tudelft.nl/uuid:3bf2ed72-3b9f-4d1e-a1c6-bbec4443a990 ISBN 978-0-85825-868-6 Source Proceeding of the 34th IAHR World Congress - Balance and Uncertainty; 33rd Hydrology and Water Resources Symposium; 10th Hydraulics Conference, 2011, June/July, Brisbane Part of collection Institutional Repository Document type conference paper Rights (c) 2011 Ali, S., Uijttewaal, W.S.J. Files PDF 277955.pdf 303.41 KB Close viewer /islandora/object/uuid:3bf2ed72-3b9f-4d1e-a1c6-bbec4443a990/datastream/OBJ/view