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Influence of Tectonic Uplift on Longitudinal Profiles of Bedrock Rivers: Numerical Simulations  

Kim Jong Yeon (Department of Geography & Geomatics, University of Glasgow)
Publication Information
Journal of the Korean Geographical Society / v.39, no.5, 2004 , pp. 722-734 More about this Journal
Abstract
Longitudinal profiles of bedrock rivers play a fundamental role in landscape history by setting the boundary conditions for landform evolution. Longitudinal profiles are changed with climatic conditions, lithology and tectonic movements. Tectonic movement is an important factor controlling longitudinal profiles, especially in tectonically active area where uplift rates are regarded as a major factor controlling channel gradient. However study on bedrock channel has made little progress, because controls over bedrock river incision are yet to be clarified. Previous numerical simulations have used a simple diffusion model, which links together the overall processes of bedrock channel erosion as in other landform evolution models. In this study, previous bedrock incision models based on physical processes (especially abrasion) are reviewed and new modifications are introduced. Using newly formulated numerical model, the role of spatial pattern and intensity of tectonic uplift on changes in river longitudinal profile was simulated and discussed.
Keywords
bedrock rivers; abrasion; numerical simulation; tectonic movements;
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