Fabbri, Stefano C.; Haas, Isabel; Kremer, Katrina; Motta, Danae; Girardclos, Stéphanie; Anselmetti, Flavio S. (2021). Subaqueous geomorphology and delta dynamics of Lake Brienz (Switzerland): implications for the sediment budget in the alpine realm. Swiss journal of geosciences, 114(1), p. 22. Springer 10.1186/s00015-021-00399-1
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Non-invasive techniques such as seismic investigations and high-resolution multibeam sonars immensely improved our understanding of the geomorphology and sediment regimes in both the lacustrine and the marine domain. How- ever, only few studies provide quantifications of basin wide-sediment budgets in lakes. Here, we use the combination of high-resolution bathymetric mapping and seismic reflection data to quantify the sediment budget in an alpine lake. The new bathymetric data of Lake Brienz reveal three distinct geomorphological areas: slopes with intercalated terraces, a flat basin plain, and delta areas with subaquatic channel systems. Quasi-4D seismic reflection data allow sediment budgeting of the lake with a total sediment input of 5.54 × 106 t sediment over 15 years of which three- quarter were deposited in the basin plain. Lake Brienz yields extraordinarily high sedimentation rates of 3.0 cm/yr in the basin plain, much more than in other Swiss lakes. This can be explained by (i) its role as first sedimentary sink in a high-alpine catchment, and by (ii) its morphology with subaquatic channel-complexes allowing an efficient sediment transfer from proximal to distal areas of the lake.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Institute of Geological Sciences 08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology |
UniBE Contributor: |
Fabbri, Stefano Claudio, Kremer, Katrina, Anselmetti, Flavio |
Subjects: |
500 Science > 550 Earth sciences & geology |
ISSN: |
1661-8726 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
Flavio Anselmetti |
Date Deposited: |
27 Jan 2022 07:40 |
Last Modified: |
05 Dec 2022 15:58 |
Publisher DOI: |
10.1186/s00015-021-00399-1 |
PubMed ID: |
34955703 |
BORIS DOI: |
10.48350/162898 |
URI: |
https://boris.unibe.ch/id/eprint/162898 |
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