Presentation by Markus Promny, Federal Institute of Hydrology (BfG), Germany, at the Delft3D - User Days (Day 1: Hydrology and hydrodynamics), during Delft Software Days - Edition 2019. Monday, 11 November 2019, Delft.

1. Large scale 2D-river modelling in German waterways –
experiences, results and wishes for the future
Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
Dr.-Ing. Markus Promny
Dipl.-Ing. Matthias Hammer
M.Sc. Wiebke Schramm
M.Sc. Steffen Holl
Dipl.-Geoökol. Marcus Hatz
promny@bafg.de
Federal Institute of Hydrology (BfG)
Am Mainzer Tor 1
D-56068 Koblenz

2. Our aim: Modelling and understanding of all aspects of our river systems
Three main fields of work: water quantity, quality and ecology
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
Weser river (360 km)
• contractor: Hydrotec
• main objective: improved
rating curves for 22 gauges
Elbe + Havel rivers (410 km)
• BfG modelling team
• main objective: improved
flood protection (triggered
by 2013 flood event)
Delft3D FM
models at BfG

3. Elbe-Havel models
Layout
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
Elbe (free flowing)
2 planned polders
dike relocations
vegetation and flood plain measures
Havel polder region (3 impoundments)
6 existing polders (filled by dike removal)
optimization of flood retention scheme
Havel + Spree region (4 impoundments)
optimization of weir operation
directly coupled
(storage of Elbe water in Havel polders)

4. Data base and model specifications
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
• curved rectangular grid in main channels
• triangles in flood plains and polders
• groynes as grid-independent fixed weirs
• 1-D elements for small tributaries and
connecting channels
topography:
digital terrain models (1m-resolution)
roughness:
• digital land-use models
(trachytope type in flood plain)
• simplified van Rijn equation in main
channels with parameter A used
for calibration
data base:
machine:
Dell LINUX high-performance -cluster >300 cpu

5. meas./mod. 2013 flood
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
Calibration and Validation
gauge measurements, water level measurements, discharges,
inundation maps
calibration
validation
meas./mod. 2011 flood

6. 6
Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
depth averaged velocities 10 June 2013 at 00:00
Video
polder inlet
Warnau
Simulation of past flood events
example: flow patterns at 2013 flood event

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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
Simulation of past flood events
inundation of 2013 flood
inundation on 15 June 2013
model result aerial photo
source: LfU Brandenburg

8. Scenarios for optimization
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
• scenarios without actual dike breaks
• position and size of polder inlets
• retention scheme based on impoundment operation of Havel / Spree
• operation scheme of inlet weir from Elbe to Havel „Neuwerben“

9. Situation of Havel mouth into Elbe
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Elbemodell
(seit 2014)
Havelpoldermodell
(seit 2016)
Havel-Spree-Modell
(seit 2019)
weir group including
weir Neuwerben
weir Gnevsdorf
Schafhorst/Twerl
Vehlgast/Flöthgraben
Gr. Grabenniederung
Warnau
Trübengraben
Kümmernitz
2013 flood: Havelberg hydrograph (mod./meas.)
Havel inflow hydrograph
(mod./meas.)

10. RTC of weir Neuwerben
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
effective observation point
at existing gauge „Neuwerben EP“
new observation point
gauge „Neuwerben new“?
rating curve influenced
by weir discharge!
increasing
weir
discharge
0 … 700 m³/s
weir Neuwerben

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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
RTC of weir Neuwerben
effective control scheme:
w.r.t. pre calculated discharge (of weir Neuwerben) for capping of gauge Wittenberge (Elbe)
suggested control scheme:
w.r.t. pre calculated water level (at gauge „Neuwerben new“)
modelled water level
effective
suggested
of gauge Wittenberge

12. Outlook
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
existing
Delft3D FM
models at BfG
step-by-step
extension
of Delft3D
model network
possibly first by
import of 1D-
SOBEK-models
or existing
other 2D-
models

13. Thank you very much for your attention!
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Delft3D - User Days (Day 1): Hydrology and hydrodynamics – 11.11.2019
PolderHavel
polder inlet Warnau 10 June 2013
(photo: LHW Sachsen-Anhalt)
model result for inlet Warnau 10 June 2013
Polder