Effect of equilibrium and non-equilibrium sediment transport flows on the shear velocity in an open channel.

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M. Maini, B.A. Kironoto, A.P. Rahardjo, Istiarto

2024 IOP Conference Series: Earth and Environmental Science Vol. 1311 Issue 1 Conference paper Cited by 1 SDG 6 Quartile

Abstract

Equilibrium and non-equilibrium sediment transport flow in natural rivers and artificial channels can result in degradation or aggradation of the river bed, which will affect many hydraulic parameters, one of which is shear velocity. This study evaluates the influence of sediment transport on shear velocity in open channels. In this study, laboratory experiments were carried out using a sediment-recirculating flume, and measurements of the velocity and Reynolds shear stress distributions were measured using a Sontek-acoustic Doppler velocimeter (ADV). This experimental study measured 120 velocity distributions, and Reynolds stress profiles, consisting of 12 different sets of measurements involving flow with sediment transport and movable sand bed. The results showed an average shear velocity, u∗, difference between sediment feeding and without sediment feeding by 9.41%. For the integration constant Br value, the average difference between sediment feeding and without sediment feeding was 5.58%. © Published under licence by IOP Publishing Ltd.

Affiliations

Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia; Department of Civil Engineering, Faculty of Infrastructure and Regional Technology, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35365, Indonesia

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