A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bed configurations downstream combined V-Notch-sharped edged Weir with inverted V-Shaped gate
Weirs and gates are hydraulic structures installed in canals, mainly for controlling the discharge. Because of their existence, unfavorable influences regarding the downstream bed configurations were recorded. This study experimentally explores the combined effect of simultaneous flow through a hydraulic device consisting of a V-notch sharped weir with an inverted V-shaped gate, aiming to minimize the downstream bed scour. Eighty-one runs were carried out using nine weir-gate models with three different vertex angles. The tests were executed considering three upstream and three downstream water depths. A V-notch weir with an angle of 120º was tested under similar hydraulic conditions and was used for comparison. The results revealed that the length of backflow was increased by the decrease in weir angle under a fixed 120° gate angle. The bed configurations were sensitive to gate angle. The combined device showed a significant decrease in bed disturbances regardless of the angles used compared to the traditional V-notch weir. Simple formulas were developed to predict the scour parameters.
Bed configurations downstream combined V-Notch-sharped edged Weir with inverted V-Shaped gate
Weirs and gates are hydraulic structures installed in canals, mainly for controlling the discharge. Because of their existence, unfavorable influences regarding the downstream bed configurations were recorded. This study experimentally explores the combined effect of simultaneous flow through a hydraulic device consisting of a V-notch sharped weir with an inverted V-shaped gate, aiming to minimize the downstream bed scour. Eighty-one runs were carried out using nine weir-gate models with three different vertex angles. The tests were executed considering three upstream and three downstream water depths. A V-notch weir with an angle of 120º was tested under similar hydraulic conditions and was used for comparison. The results revealed that the length of backflow was increased by the decrease in weir angle under a fixed 120° gate angle. The bed configurations were sensitive to gate angle. The combined device showed a significant decrease in bed disturbances regardless of the angles used compared to the traditional V-notch weir. Simple formulas were developed to predict the scour parameters.
Bed configurations downstream combined V-Notch-sharped edged Weir with inverted V-Shaped gate
Ibrahim, Mohamed M. (author) / Diwedar, Al Sayed Ibrahim (author) / Ibraheem, Ahmed M. (author) / Fathallah, Noha F. (author) / Ibrahim, Amir (author)
ISH Journal of Hydraulic Engineering ; 30 ; 151-161
2024-03-14
11 pages
Article (Journal)
Electronic Resource
English
Generalized Head-Discharge Equation for Flow over Sharp-Crested Inclined Inverted V-Notch Weir
| British Library Online Contents | 2004
Combined Flow over Weir and under Gate
| Online Contents | 2009
Combined Flow over Weir and under Gate
| British Library Online Contents | 2009
V-Notch Weir Overflow: an Unsteady Calibration
| HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2013