Location
Virtual
Start Date
7-5-2021 12:00 AM
End Date
7-8-2021 12:00 AM
Description
Recently, various low-head environment friendly structures have been used to control the sediment transport and preserve river navigability. Among these structures, double winged log-frames are effective for concentrating the flow by decreasing channel width. Moreover, they create scour holes which can be used by fishes as resting spots. Usually, log-frames are placed in mountainous curved channels where there is natural growth of various types of in-stream vegetation in the downstream stilling basin of the structure which influences scour geometry and depth. Therefore, the current study aims to analyze the impact of rigid woody vegetation, placed downstream of double winged log-frames, on the overall equilibrium stilling basin morphology and scour depth magnitude in curved channels. The presence of rigid vegetation in different configurations and densities generally reduces the maximum scour depth with respect to the maximum scour generated in reference tests. Moreover, the vegetation considerably influences scour morphology and acts as natural protection to maintain channel bank and stilling basin stability.
Included in
Scour Downstream of Log-Frame Structures in the Presence of Rigid Vegetation
Virtual
Recently, various low-head environment friendly structures have been used to control the sediment transport and preserve river navigability. Among these structures, double winged log-frames are effective for concentrating the flow by decreasing channel width. Moreover, they create scour holes which can be used by fishes as resting spots. Usually, log-frames are placed in mountainous curved channels where there is natural growth of various types of in-stream vegetation in the downstream stilling basin of the structure which influences scour geometry and depth. Therefore, the current study aims to analyze the impact of rigid woody vegetation, placed downstream of double winged log-frames, on the overall equilibrium stilling basin morphology and scour depth magnitude in curved channels. The presence of rigid vegetation in different configurations and densities generally reduces the maximum scour depth with respect to the maximum scour generated in reference tests. Moreover, the vegetation considerably influences scour morphology and acts as natural protection to maintain channel bank and stilling basin stability.