DOI: 10.5194/hess-18-1-2014
Scopus记录号: 2-s2.0-84891772809
论文题名: Flow resistance of vegetated oblique weir-like obstacles during high water stages
作者: Ali S ; , Uijttewaal W ; S ; J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 1 起始页码: 1
结束页码: 14
语种: 英语
Scopus关键词: Conveyance capacity
; Flood plains
; Flow downstream
; Flow resistance
; High water
; Momentum conservation equations
; Subcritical flow
; Sudden expansion
; Drag
; Energy dissipation
; Hydraulic structures
; Water levels
; Weirs
; Rivers
; emergence
; experimental study
; floodplain
; numerical model
; one-dimensional modeling
; river flow
; vegetation structure
; water level
英文摘要: 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. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78361
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Fluid Mechanics Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600GA Delft, Netherlands
Recommended Citation:
Ali S,, Uijttewaal W,S,et al. Flow resistance of vegetated oblique weir-like obstacles during high water stages[J]. Hydrology and Earth System Sciences,2014-01-01,18(1)