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Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union
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ESurf | Articles | Volume 8, issue 2
Earth Surf. Dynam., 8, 447–470, 2020
https://doi.org/10.5194/esurf-8-447-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Earth Surf. Dynam., 8, 447–470, 2020
https://doi.org/10.5194/esurf-8-447-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Jun 2020

Research article | 03 Jun 2020

Parameterization of river incision models requires accounting for environmental heterogeneity: insights from the tropical Andes

Benjamin Campforts et al.

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Aalto, R., Dunne, T., and Guyot, J. L.: Geomorphic Controls on Andean Denudation Rates, J. Geol., 114, 85–99, https://doi.org/10.1086/498101, 2006. 
Abbühl, L. M., Norton, K. P., Jansen, J. D., Schlunegger, F., Aldahan, A., and Possnert, G.: Erosion rates and mechanisms of knickzone retreat inferred from 10Be measured across strong climate gradients on the northern and central Andes Western Escarpment, Earth Surf. Proc. Land., 36, 1464–1473, https://doi.org/10.1002/esp.2164, 2011. 
Alcamo, J., Döll, P., Henrichs, T., Kaspar, F., Lehner, B., Rösch, T., and Siebert, S.: Development and testing of the WaterGAP 2 global model of water use and availability, Hydrolog. Sci. J., 48, 317–337, https://doi.org/10.1623/hysj.48.3.317.45290, 2003. 
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Armitage, J. J., Whittaker, A. C., Zakari, M., and Campforts, B.: Numerical modelling of landscape and sediment flux response to precipitation rate change, Earth Surf. Dynam., 6, 77–99, https://doi.org/10.5194/esurf-6-77-2018, 2018. 
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In this contribution, we explore the spatial determinants of bedrock river incision in the tropical Andes. The model results illustrate the problem of confounding between climatic and lithological variables, such as rock strength. Incorporating rock strength explicitly into river incision models strongly improves the explanatory power of all tested models and enables us to clarify the role of rainfall variability in controlling river incision rates.
In this contribution, we explore the spatial determinants of bedrock river incision in the...
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