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Stream Width Adjustment to Upstream Loading

by Carlos V. Alonso, USDA, Fort Collins, CO, USA,
Samuel T. Combs, USDA, Fort Collins, CO, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Channel width adjustments takes place either by fluvial erosion or accretion of the banks, or by their mass failure under gravity and subsequent removal of the slump debris. Simulation experiments were performed using a physically-based computer model which treats the dynamic interrelations of momentum and mass conservation, alluvial flow resistance, sediment transport, bank stability, and lateral accumulation and depletion of sediment within a cross section. The results of these experiments show that the rate at which an alluvial channel bed degrades decreases significantly where there is bank failure. It is also shown that bank accretion during aggradation can lead to increased bank stability.

Subject Headings: River bank stabilization | Alluvial channels | Stream channels | Sediment transport | Computer models | River and stream beds | Rivers and streams

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