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EXPERIMENTAL STUDY ON SEDIMENT DISTRIBUTION AT CHANNel BIFURCATION

International Journal of Sediment Research 2002年第2期17卷 124-136页

作者： G.M. tarekul ISLAM1, M.R. KABIR2 and Ainun NISHAT3 1 Institute of Flood Control and Drainage Research, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh, E-mail: tarek@ifcdr.buet.ac.bd 2 Department of Water Resources Engineeri Institute of Flood Control and Drainage Research Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh Department of Water Resources Engineering Bangladesh University of Engineering and Technology Dhaka 1000 Bangladesh International Union for Conservation of Nature Dhaka Bangladesh

This paper presents the experimental results on the distribution of sediments at channel bifurcation. The experiments have been conducted in a physical model of channel bifurcation. It consists of a straight main channel which bifurcates into two branch channels of different widths. The test rig is a mobile bed with fixed bank. Four different noses have been used to study the phenomenon. For each nose, three upstream discharges viz. 20 l/s, 30 l/s and 40 l/s have been employed. From the measured data, discharges and sediment transport ratios per unit width are calculated in the downstream branches. These data have been set to the general nodal point relation and a set of equations has been developed to describe the distribution of sediments to the downstream branches for different nose angles.

关键词： Bifurcation Distribution of sediment Nose angle Nodal point relation

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