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 2014-01-03 Abstract At high water stages, obstacles (submerged and particularly emerged vegetation) in the flood plains of a river contribute to the flow resistance and hamper the conveyance capacity. In particular the elevated vegetated parts are expected to play an important role. The objective of this research work is to determine the form drag due to vegetated oblique weir-like obstacles. Experiments have been performed to measure the energy head losses for a range of subcritical flow conditions, varying discharges and downstream water levels. The energy head loss caused by the submerged vegetated weir-like obstacle has been modeled using an expansion loss form drag model that has been derived from the one-dimensional momentum conservation equation and accounts for the energy loss associated with a deceleration of the flow downstream of a sudden expansion. The results have been compared with the experimental data and showed an overall good agreement. To reference this document use: http://resolver.tudelft.nl/uuid:edba50d2-19d6-4b19-b3f2-9984dbff9f65 DOI https://doi.org/10.5194/hess-18-1-2014 Publisher European Geosciences Union ISSN 1812-2108 Source http://www.hydrol-earth-syst-sci.net/18/1/2014/ Source Hydrology and Earth System Sciences, 18 (1), 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 The Author(s)CC Attribution 3.0 License Files PDF Ali_2013.pdf 664.95 KB Close viewer /islandora/object/uuid:edba50d2-19d6-4b19-b3f2-9984dbff9f65/datastream/OBJ/view