Distribution of erosion across bedrock channels |
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| Authors: | Jens M Turowski Niels Hovius Hsieh Meng‐Long Dimitri Lague Chen Men‐Chiang |
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| Institution: | 1. Department of Earth Sciences, University of Cambridge, UK;2. Department of Earth Sciences, National Taiwan University, Taiwan;3. Géosciences Rennes, UMR 6118 CNRS, Rennes, France;4. Taroko National Park, Hualien Province, Taiwan |
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| Abstract: | Lateral erosion in bedrock rivers is an important control on the shape of channel cross‐sections, and the coupling of channels and hillslopes. Recent observations link lateral erosion to the variability of flow. We propose two mechanisms to explain this. One is based on changing shear stress distributions within the channel with varying flood level, the other on the competition between cover and tool effects in fluvial bedrock erosion. We assess these processes for the Liwu River, Taiwan, and conclude that cover and tool effects dominate the partitioning of lateral and vertical erosion in this case. Copyright © 2007 John Wiley & Sons, Ltd. |
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| Keywords: | fluvial geomorphology bedrock erosion sediment effects Taiwan |
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