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)

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

doi:https://doi.org/10.5194/esurf-5-125-2017

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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Final revised paper (published on 21 Feb 2017)
Preprint (discussion started on 17 Aug 2016)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Referee report', Anonymous Referee #1, 09 Sep 2016
- AC1: 'Answer to RC1: 'Referee report', Anonymous Referee #1, 09 Sep 2016', Margaux Mouchene, 23 Sep 2016
RC2: 'Review of Mouchené et al., on the Lannemezan Fan', Hugh Sinclair, 17 Nov 2016

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Margaux Mouchene on behalf of the Authors (09 Jan 2017) Author's response Manuscript

ED: Publish as is (24 Jan 2017) by Sebastien Castelltort

ED: Publish as is (30 Jan 2017) by Niels Hovius (Editor)

AR by Margaux Mouchene on behalf of the Authors (01 Feb 2017) Manuscript

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.