Reduced sediment supply in a fast eroding landscape? A multi-proxy sediment budget of the upper Rhône basin, Central Alps

Laura Stutenbecker, Romain Delunel, Fritz Schlunegger, Tiago Adrião Silva, Branimir Segvic, Stéphanie Girardclos, Maarten Bakker, Anna Costa, Stuart N Lane, Jean-Luc Loizeau, Peter Molnar, Naki Akçar, Markus Christl

Research output: Contribution to journalArticlepeer-review

Abstract

Alpine water and sediment supply influence the sediment budget of many important European fluvial systems such as the Rhine, Rhône and Po rivers. In the light of human induced climate change and landscape modification, it becomes increasingly important to understand the mechanisms of sediment production and supply in Alpine sediment systems. This study aims to investigate the modern sediment budget of the upper Rhône basin, one of the largest Alpine intramontane watersheds, located in the Central Alps of southwestern Switzerland. Major areas of sediment generation are fingerprinted by framework petrography, heavy mineral concentrations and bulk geochemistry. The relative contributions of the three major sources to the sediment of the trunk Rhône river are identified by compositional mixing modelling. Concentrations of the terrestrial cosmogenic nuclide 10Be measured in quartz separated from fluvial sediments provide spatially averaged denudation rates for selected tributary basins. Re
Original languageEnglish
Pages (from-to)105–119
JournalSedimentary Geology / Elsevier BV
StatePublished - Apr 2018

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