Characteristic Deformation of Alternate Bars Due to Low Flow

by Kunihide Uchijima, Kitami Inst of Technology, Kitami, Japan,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Experiments on the formation of a small meander-channel at low stage are conducted by supplying a proper discharge on initial bed of alternate bars that have been formed in experimental flume. It is found that the formation of a small meander-channel results in the development of local scour and the deformation of bars. The hysterisis effect of a small meander-channel to the alternate bar that may be formed again at high stage is also examined by flume experiment. A diagram that can distinguish the deformed bar from a series of bars is proposed on the basis of the data of experiments presented herein and actual rivers.

Subject Headings: Deformation (mechanics) | Bars (structure) | Low flow | Shoals | Hydraulic models | Channel flow | Water discharge | Scour

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