<div class="csl-bib-body">
<div class="csl-entry">Thorez, S., Lemmin, U., Barry, D. A., & Blanckaert, K. (2025, November 6). <i>Repeated bathymetrical surveys reveal transient storage of sediment in the near-field region of the plunging Rhône River inflow into Lake Geneva</i> [Poster Presentation]. Vienna Doctoral Programme on Water Resource Systems: Annual Symposium (DK Symposium 2025), Mörbisch, Austria. https://doi.org/10.34726/11723</div>
</div>
-
dc.identifier.uri
http://hdl.handle.net/20.500.12708/224262
-
dc.identifier.uri
https://doi.org/10.34726/11723
-
dc.description.abstract
Negatively buoyant (hyperpycnal) river inflows plunge upon entering lakes or reservoirs, feeding gravity-driven underflows that propagate along the bed [1, 2]. When these underflows encounter a layer of equal density within the water column, they detach from the bed and transition into an interflow. In this light, the hydro-sedimentary processes related to plunging set the upstream boundary conditions for under- and interflows. The interaction of a plunging flow with the local lake bed is understudied as of yet. Using ADCP velocity and backscatter data, Thorez et al. (2024) [3] hypothesized that the plunging Rhône River inflow into Lake Geneva locally eroded the bed near the river mouth during high discharge and high suspended sediment conditions on June 26, 2019, yet they did not prove this using repeated bathymetrical survey data. The aim of the present contribution is to test and demonstrate this hypothesis.
Boat-towed ADCP measurements were used to eluci-date the near-field bathymetry of the plunging Rhône River plume in Lake Geneva along longitudinal (away-from-mouth) transects. These measurements were performed on June 23, June 26 and July 11, 2019.
Figure 1 reveals that between June 23 and June 26, 2019, the lake bed within the plunging region aggrad-ed by an amount in the order of 1 m and up to a max-imum of 2 m, indicating that the hydro-sedimentary processes related to plunging were nett depositional in nature. No significant changes in the bed height were measured further downstream. Between June 26 and July 11, 2019, the lake bed eroded by up to 10 m in the plunging region and in the order of 5 m further downstream. This is in accordance with the findings of Thorez et al. (2024) [3] that state that the conditions on June 26, 2019, most likely led to ero-sion. The consecutive periods of deposition and ero-sion comply with their hypothesis of transient stor-age of sediment within the plunging region.
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
-
dc.language.iso
en
-
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
-
dc.subject
ADCP
en
dc.subject
hyperpycnal
en
dc.subject
river plume
en
dc.subject
erosion
en
dc.subject
deposition
en
dc.subject
sediment transport
en
dc.subject
transient sediment storage
en
dc.title
Repeated bathymetrical surveys reveal transient storage of sediment in the near-field region of the plunging Rhône River inflow into Lake Geneva
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.rights.license
Creative Commons Namensnennung 4.0 International
de
dc.rights.license
Creative Commons Attribution 4.0 International
en
dc.identifier.doi
10.34726/11723
-
dc.contributor.affiliation
École Polytechnique Fédérale de Lausanne, Switzerland
-
dc.contributor.affiliation
École Polytechnique Fédérale de Lausanne, Switzerland
-
dc.relation.grantno
I 6180-N
-
dc.type.category
Poster Presentation
-
tuw.project.title
Hyperpycnal sedimentladen river plumes in lakes
-
tuw.researchTopic.id
C2
-
tuw.researchTopic.id
E4
-
tuw.researchTopic.name
Computational Fluid Dynamics
-
tuw.researchTopic.name
Environmental Monitoring and Climate Adaptation
-
tuw.researchTopic.value
30
-
tuw.researchTopic.value
70
-
tuw.publication.orgunit
E222-01 - Forschungsbereich Wasserbau und Umwelthydraulik
-
tuw.author.orcid
0000-0002-2282-2449
-
tuw.author.orcid
0000-0001-8561-0665
-
tuw.author.orcid
0000-0002-8621-0425
-
tuw.author.orcid
0000-0002-6630-3683
-
dc.rights.identifier
CC BY 4.0
de
dc.rights.identifier
CC BY 4.0
en
tuw.event.name
Vienna Doctoral Programme on Water Resource Systems: Annual Symposium (DK Symposium 2025)
en
tuw.event.startdate
06-11-2025
-
tuw.event.enddate
07-11-2025
-
tuw.event.online
On Site
-
tuw.event.type
Event for scientific audience
-
tuw.event.place
Mörbisch
-
tuw.event.country
AT
-
tuw.event.institution
TU Wien
-
tuw.event.presenter
Thorez, Stan
-
tuw.event.track
Single Track
-
wb.sciencebranch
Bauingenieurwesen
-
wb.sciencebranch
Umwelttechnik
-
wb.sciencebranch
Hydrologie
-
wb.sciencebranch.oefos
2011
-
wb.sciencebranch.oefos
2071
-
wb.sciencebranch.oefos
1053
-
wb.sciencebranch.value
30
-
wb.sciencebranch.value
20
-
wb.sciencebranch.value
50
-
item.fulltext
with Fulltext
-
item.grantfulltext
open
-
item.openairecristype
http://purl.org/coar/resource_type/c_18co
-
item.cerifentitytype
Publications
-
item.languageiso639-1
en
-
item.openairetype
conference poster not in proceedings
-
item.openaccessfulltext
Open Access
-
item.mimetype
application/pdf
-
crisitem.author.dept
E222-01 - Forschungsbereich Wasserbau
-
crisitem.author.dept
École Polytechnique Fédérale de Lausanne
-
crisitem.author.dept
École Polytechnique Fédérale de Lausanne
-
crisitem.author.dept
E222-01 - Forschungsbereich Wasserbau
-
crisitem.author.orcid
0000-0002-2282-2449
-
crisitem.author.orcid
0000-0001-8561-0665
-
crisitem.author.orcid
0000-0002-6630-3683
-
crisitem.author.parentorg
E222 - Institut für Wasserbau und Ingenieurhydrologie
-
crisitem.author.parentorg
E222 - Institut für Wasserbau und Ingenieurhydrologie
