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Bed Waves Generated by Internal Waves in Alluvial Channels

by Bartele de Jong, Twente Univ, Netherlands,



Document Type: Proceeding Paper

Part of: Sediment Transport Modeling

Abstract:

The flow in an alluvial channel is conceived as a stratified flow both with respect to the velocity- and density-distribution. In such flows internal waves may occur which influence the generation of bed elevations. This paper presents a theory that explains for low-Froude-number flows the initiation of dunes and ripples by these waves on a flat bed. The theory is demonstrated by comparing theoretical and experimental results for the case of bed-load transport. However, an extension to the case of suspended-load transport is straightforward.

Subject Headings: Alluvial channels | Internal waves | Water waves | Bed loads | Water supply systems | Suspended loads | Sediment transport

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