Recent advances in flow and sediment transport investigation of Neusiedlersee, AustriaHungary

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Recent advances in flow and sediment transport
investigationof Neusiedlersee, Austria-Hungary
Lakepromo Seminar Brighton, 26-28 October 2005
Prof. János JÓZSA and Mr. Tamás KRÁMER Budapest
University of Technology and Economics Department
of Hydraulic and Water Resources
Engineering E-mail jozsa_at_vit.bme.hu,
kramer_at_vit.bme.hu Website www.vit.bme.hu
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Joint research efforts by Hungarian (Budapest
University of Technology and Economics), Austrian
(Illmitz Biologische Station) and Finnish
(Finnish Environmental Institute) Institutions
to combine up-to-date measuring and numerical
modelling technology Main goals Coupled
measuring and modelling of the large scale
(lake-wide) and local small scale (bay, even
harbour) characteristics of wind wind- induced
flow and sediment transport to provide
hydrodynamic bases to estimate water
exchange sediment transport fish habitat
conditions in the existing and future situations
planned for improvement or maintenance
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Lake bottom topography and reed coverage
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Usual wind station set-up
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Special double-point measurement programme in
Fertorákos Bay to explore the fetch-dependence of
the near surface wind field more in details
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Vector time series of a typical NNW wind speed
and related flow velocities
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Flow measurement and 2D numerical model fitting
with proper wind field estimation in Fertorákos
Bay (three times larger scale for measured flow
vectors)
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Extension of the measurements into the Austrian
lake in 2004
Typical measured wind field and time
series Observe the significant wind speed-up
over the lake!
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Computational grid adaptation to wind, depth,
reed border and flow irregularities
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Refined modelling of the flow field and
comparison with field data for NNW wind by grid
adaptation
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2D model offered to Lakepromo applications Overvi
ew on recent applications and modelling
principles available on the local Lakepromo
website in two weeks time