Submerged Vanes for Sediment Control in Rivers

by A. Jacob Odgaard, Univ of Iowa, Iowa City, IA, USA,
Anita Spoljaric, Univ of Iowa, Iowa City, IA, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

A procedure is developed for a rational design of a system of submerged vanes for depth control in alluvial-river channels. The vanes are vertical, small-aspect ratio foils installed on the channel bed at an angle of attack of 10 to 15 degrees with the flow. Their height is 0. 2 to 0. 5 times the water depth at design flow. The design procedure is based on a calculation of the transverse bed slope generated by the vane-induced transverse component of the near-bed velocity vector. The streamwise extent of the vanes' impact is governed by the momentum equation. The effectiveness of the technique is tested in a series of laboratory experiments.

Subject Headings: Vanes | Alluvial channels | Hydraulic design | Submerging | Laboratory tests | Slopes | Sediment transport

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