Temporal Scour Variations at Permeable and Angled Spur Dikes under Steady and Unsteady Flows
Water (Switzerland), 2022 Spur dikes are river protection structures typically used for flow diversion from erodible banks. However, scouring might be a severe problem that compromises their stability and, consequently, their hydraulic function. This paper aims to study the maximum scour depth at permeable and angled spur dikes under hydrographs of different duration ...
Seyed Mahmood Kashefipour +1 more
exaly +3 more sources
Experimental Study on Effects of Permeability and Spur Dike Series Length on Scour-Hole Dimensions in a 90° mild bend under non-submerged conditions [PDF]
علوم و مهندسی آبیاری, 2017 River changes happen due to the periodic erosion and sedimentation along river bed, destruction and widening of river banks, movement of the meandering pattern and flow direction, changing of river form (braided, sinusoidal, and straight), and shortcut ...
maryam champour +1 more
doaj +2 more sources
Sustainability, 2023 Owing to the different degrees of bending in rivers in nature, it is difficult to conduct experiments in situ. In this study, the renormalization group (RNG) k-ε turbulence model in ANSYS Fluent was used to analyze the three-dimensional flow structure and turbulence characteristics near a spur dike and to evaluate the variation trend of flow in rivers ...
He-Fang Jing, Chunguang Li
exaly +2 more sources
Experiment Study on Bed Topography around Wedged Bandal-like, Bandal-like and Impermeable Spur dike Structures at 180 Degree Bend in Non-Submerged Conditions [PDF]
علوم و مهندسی آبیاری, 2022 Due to scouring problems in impermeable spur dikes, which compromise structural strength and stability and as a result repair and maintenance costs increase, an alternative method of scouring is needed to protect the river bank. In this area, bandal-like
Abdollah Sardasteh +3 more
doaj +1 more source
Local Scour at Permeable Spur Dikes
Journal of Applied Sciences, 2008 A. Nasrollahi +2 more
exaly +2 more sources
Experimental and numerical investigation of flow over a spillway bend with different combinations of permeable spur dikes [PDF]
Water Supply, 2021 Abstract In this paper, the effects of different combinations of permeable spur dikes installed in the bend section of spillway on flow characteristics and energy dissipation rate were experimentally and numerically investigated. The results indicate that the permeable spur dikes installed in the spillway bend appreciably contributes to ...
Jinmeng Yang +5 more
openaire +2 more sources
Experimental Analysis of The Effect of Bandal-like Spur Dike Submergence on Bed Topography In 90 Degree Bend [PDF]
علوم و مهندسی آبیاری, 2018 Spur dikes are one of the coastal protection methods. Bandal- like is a local type of spur dikes that would be constructed to improve the water depth for navigation in alluvial rivers.
Mohsen Jalili +3 more
doaj +1 more source
Experimental Study on the Influence of New Permeable Spur Dikes on Local Scour of Navigation Channel
Sustainability, 2022 The depths and areas of the scour holes around spur dikes are the most concerning issues regarding spur dike design. In this study, using a moving bed experiment, the influence of traditional rock-fill spur dikes and new permeable spur dikes with different permeabilities on riverbed scour under unsteady flow was studied, and the spatial characteristics
Hu, Jielong +4 more
openaire +1 more source
Measurement and Characteristic Analysis of Turbulent Flow near Permeable Spur Dike
Instrumentation Mesure Métrologie, 2020 To disclose the turbulence features near a permeable spur dike, this paper measures the three-dimensional (3D) instantaneous velocity at different vertical lines and depths around the permeable spur dike through acoustic Doppler velocimetry (ADV). The relative turbulence intensity and Reynolds stress were calculated for each measuring point, and the ...
Jielong Hu +5 more
openaire +2 more sources
مجله آب و خاک, 2017 Introduction: Outer bank region is always exposed to destruction and scour due to secondary flow. Different methods are generally used to protect the outer bank. One of the most common and economical ways is spur dike.
somayeh rahimi +3 more
doaj +1 more source