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| Titel |
3D simulation of the influence of internal mixing dynamics on the
propagation of river plumes in Lake Constance |
| VerfasserIn |
Thomas Pflugbeil, Franziska Pöschke, Anna Noffke, Vera Winde, Thomas Wolf |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250152686
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| Publikation (Nr.) |
 EGU/EGU2017-17554.pdf |
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| Zusammenfassung |
| Lake Constance is one of most important drinking water resources in southern Germany.
Furthermore, the lake and its catchment is a meaningful natural habitat as well as economical
and cultural area.
In this context, sustainable development and conservation of the lake ecosystem and
drinking water quality is of high importance. However, anthropogenic pressures
(e.g. waste water, land use, industry in catchment area) on the lake itself and its
external inflows are high. The project "SeeZeichen" (ReWaM-project cluster by
BMBF, funding number 02WRM1365) is investigating different immission pathways
(groundwater, river, superficial inputs) and their impact on the water quality of Lake
Constance. The investigation includes the direct inflow areas as well as the lake-wide
context.
The present simulation study investigates the mixing dynamics of Lake Constance and its
impacts on river inflows and vice versa. It considers different seasonal (mixing
and stratification periods), hydrological (flood events, average and low discharge)
and transport conditions (sediment loads). The simulations are focused on two
rivers: The River Alpenrhein delivers about 60 % of water and material input into
Lake Constance. The River Schussen was chosen since it is highly anthropogenic
influenced.
For this purpose, a high-resolution three-dimensional hydrodynamic model of the Lake
Constance is set up with Delft3D-Flow model system. The model is calibrated and validated
with long term data sets of water levels, discharges and temperatures. The model results will
be analysed for residence times of river water within the lake and particle distributions to
evaluate potential impacts of river plume water constituents on the general water quality of
the lake. |
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