Articles | Volume 7, issue 4
Earth Surf. Dynam., 7, 1041–1057, 2019
Earth Surf. Dynam., 7, 1041–1057, 2019

Research article 29 Nov 2019

Research article | 29 Nov 2019

Estimating the disequilibrium in denudation rates due to divide migration at the scale of river basins

Timothée Sassolas-Serrayet et al.

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Cited articles

Bierman, P. and Nichols, K. K.: Rock to sediment slope to sea with 10Be rates of landscape change, Annu. Rev. Earth Planet. Sci., 32, 215–255, 2004. 
Binnie, S. A., Phillips, W. M., Summerfield, M. A., and Fifield, L. K.: Tectonic uplift, threshold hillslopes, and denudation rates in a developing mountain range, Geology, 35, 743–746, 2007. 
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Burbank, D. W., Leland, J., Fielding, E., Anderson, R. S., Brozovic, N., Reid, M. R., and Duncan, C.: Bedrock incision, rock uplift and threshold hillslopes in the northwestern Himalayas, Nature, 379, 505–510,, 1996. 
Campforts, B. and Govers, G.: Keeping the edge: A numerical method that avoids knickpoint smearing when solving the stream power law, J. Geophys. Res.-Ea. Surf., 120, 1189–1205, 2015. 
Short summary
The topographic steady-state assumption is often used in geomorphology. However, recent studies suggest that a drainage network is more mobile than previously thought. Using landscape evolution models, we show that those migrations have a significant impact on basin-wide denudation rates even if an overall topographic steady state is achieved at large scale. Our approach provides new tools to derive minimal uncertainties in basin-scale denudation rates due to this topographic disequilibrium.