Investigation of stochastic-threshold incision models across a climatic and morphological gradient

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Abstract 10 Be cosmogenic radionuclide (CRN) concentration measurements in river sediments, morphometric analysis of river long profiles, and field observations. This new dataset is used for a systematic investigation of various formulations of the SPM and to discuss the importance of incision thresholds. Denudation rates across the SE margin of the Massif Central are in the 20–120 mm kyr- 1 D 50 k, runoff) controlling the SPM. Overall, the range of denudation rate across the margin can mainly be explained using a simple version of the SPM accounting for spatially heterogeneous runoff. More complex formulations including stochastic discharge and incision thresholds yield poorer performances unless the spatial variations in bedload characteristics controlling incision thresholds are taken into account. Our results highlight the importance of the hypotheses used for such a threshold in SPM application to field studies and notably the impact of actual constraints on bedload size.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Investigation of stochastic-threshold incision models across a climatic and morphological gradient ; volume:10 ; number:3 ; year:2022 ; pages:473-492 ; extent:20
Earth surface dynamics ; 10, Heft 3 (2022), 473-492 (gesamt 20)

Creator: Desormeaux, Clément
Godard, Vincent
Lague, Dimitri
Duclaux, Guillaume
Fleury, Jules
Benedetti, Lucilla
Bellier, Olivier

DOI: 10.5194/esurf-10-473-2022

URN: urn:nbn:de:101:1-2022060905304261349962

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:33 AM CEST

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Desormeaux, Clément
Godard, Vincent
Lague, Dimitri
Duclaux, Guillaume
Fleury, Jules
Benedetti, Lucilla
Bellier, Olivier

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