Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 5, issue 1
Articles | Volume 5, issue 1
https://doi.org/10.5194/esurf-5-125-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esurf-5-125-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 5, issue 1
Research article
 | 
21 Feb 2017
Research article |  | 21 Feb 2017

Autogenic versus allogenic controls on the evolution of a coupled fluvial megafan–mountainous catchment system: numerical modelling and comparison with the Lannemezan megafan system (northern Pyrenees, France)

Margaux Mouchené, Peter van der Beek, Sébastien Carretier, and Frédéric Mouthereau

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Short summary
The Lannemezan megafan (northern Pyrenean foreland) was abandoned during the Quaternary and subsequently incised. We use numerical models to explore possible scenarios for the evolution of this megafan. We show that autogenic processes are sufficient to explain its evolution. Climate may have played a second-order role; in contrast base-level change, tectonic activity and flexural isostatic rebound do not appear to have influenced its evolution.
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