Modelling the effect of vegetation on channel pattern in bedload rivers

Journal Article (Journal Article)

We modify a simple numerical stream-pattern model to examine the effect of sediment stabilization by roots on the channel pattern of bedload rivers. In the model, vegetation enhances bank resistance to erosion, causing the development of a single channel instead of a rapidly changing, multiple channel (braided) pattern. Net aggradation resulting from a high sediment supply, however, causes frequent avulsions that destroy vegetation locally, leading to the development of a multiple-channel pattern. A stability diagram representing multiple model runs predicts whether a river will exhibit single or multiple channels, based on plant-enhanced bank strength, and on the time scale of plant development relative to a time scale for change in unvegetated channels. A second stability diagram predicts the way in which the amplitude and period of a fluctuating imposed sediment load influence whether a single or multiple-channel pattern develops. © 2003 John Wiley and Sons. Ltd.

Full Text

Duke Authors

Cited Authors

  • Murray, BA; Paola, C

Published Date

  • February 1, 2003

Published In

Volume / Issue

  • 28 / 2

Start / End Page

  • 131 - 143

International Standard Serial Number (ISSN)

  • 0197-9337

Digital Object Identifier (DOI)

  • 10.1002/esp.428

Citation Source

  • Scopus