Movement of Sediment Mixtures in a Parabolic Flume with Simulated Rainfall

by Jau-Yau Lu, Purdue Univ, United States,
M. J. Khan, Purdue Univ, United States,

Abstract: A 4-m long flume with parabolic cross section and adjustable slope was constructed to investigate the sediment carrying capacity and the variation of grain size distribution during deposition. Rainfall was applied on the flume bed using a programmable rainfall simulator. Preliminary results indicated that the degree of coarsening of the eroded material was related to the degree of equilibrium of the flow condition for a given sediment supply rate and rainfall intensity on the flume bed. A simplified dimensionless sediment transport relationship using a representative particle size was also developed based on the collected data.

Subject Headings: Flumes | Paraboloid | Rainfall | Sediment transport | Rain water | Bed materials | Mixtures

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