Direct observations of bedform migration driven by turbidity currents in a lacustrine channel.

ABSTRACT: Turbidity currents, gravity-driven sediment-laden flows, govern material transport and shape underwater landscapes across diverse environments. While extensively studied in marine settings, their dynamics in freshwater systems remain underexplored. We present multi-temporal, multi-scale observations from the Aare Delta of Lake Brienz (Switzerland), combining Acoustic Doppler Current Profiler measurements with high-resolution repeated bathymetric surveys to capture turbidity currents and resulting morphological changes. A single turbidity current reached near-bed velocities of 0.65 m/s and induced upslope migration of a cyclic step by at least 4 m within minutes. Characterisation of overall bedform migration across the channel network over five years highlights the cumulative imprint of tur

SUBMITTER: Sauter G 

PROVIDER: S-EPMC12575640 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature