Presentation by Markus Promny (Federal Institute of Hydrology, Germany), at the Delft3D User Days, during Delft Software Days - Edition 2022. Tuesday, 15 November 2022.

1. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Towards the General Establishment of 2D-Models for German Waterways
Software and Infrastructure
Tangermünde, September 2021
(Foto: BfG)
Dr.-Ing. Markus Promny
Dipl.-Geoökol. Marcus Hatz
M.Sc. Wiebke Schramm

2. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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The Federal Institute of Hydrology (BfG) in a nutshell
hydrology water resources management ecology conservation of waters
Scientific institute of the Federal Government for research,
assessment, and consulting in the fields of
Multi-disciplinarity at BfG
Quantitative hydrology
M
Qualitative hydrology
G
Ecology
U
- Hydrometry
- Water balance,
forecasting and
predictions
- River morphology,
sediment dynamics
- Geographic
information and
remote sensing
- Geodesy
Consultant for the Federal Waterways and Shipping Administration
as well as for the Federal Ministries (transport, environment, …)
- Acquatic chemistry
- Biochemistry,
ecotoxicology
- Radiology, water
monitoring
- General principles of
water quality
- Ecological
interactions
- Vegetation studies,
landscape
management
- Animal ecology
- General principles of
ecology,
environmental
protection
www.bafg.de

3. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Extend of 2D-models for German Waterways at BfG in 2022
existing 2D-models:
Elbe (200 km)
Havel/Spree (200 km)
Weser (400 km)
2D-models in preparation:
Elbe (completion)
Mosel
Saar
Lahn
Kiel Canal
major waterway:
nearly completely covered
with 1D-models at BfG

4. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Achievements
doi.bafg.de/BfG/2022/BfG-2102.pdf
doi.bafg.de/BfG/2021/BfG-2060.pdf
doi.bafg.de/BfG/2015/BfG-1848.pdf
predecessor. Project ongoing
3 major projects completed (2 in continuation) & basic data for various other projects
focus: - analysis of the hydrological regime (mapping of all relevant variables)
- review and improvement of existing assessment tools and charts
- identification of new protection measures
- optimization of existing measures and schemes

5. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Analysis of the hydrological regime
example: Weser river
river reach
upper boundary
lower boundary
gauge
modelled tributary
inflow tributary
lateral boundary (inflow)
weir
pump
ship lock side channel
Schematization
proprietary grid generators
for main channel and floodplain
1200 km²
2.2 million cells
24 partitions
land use database
DEM

6. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Analysis of the hydrological regime
example: Weser river
set of maps:
water depth:
velocities:
specific discharge:
water level elevation:
• comprehensive data set
• for whole inland river stretch including main tributaries
• for all discharge levels from extreme drought to extreme flood
• data set to be made publicly available

7. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Review and improvement of existing assessment tools and charts
old rating curve
rating curve since 2007
2D-model result
measurements
rating curve for gauge Hann. Münden
• all rating curves have been compared to model results
→ improved confidence

8. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Identification of new flood protection measures
• systematic search for:
− suitable dike relocation sites
− new polders
− flood plain management options
• focussed on hydraulic bottlenecks
• 2D-model: delivers quantifications as basis for political and administrational decision making
dike breach Fischbeck (Elbe) 2013
peak discharge: 5150 m³/s
photo: LHW Sachsen Anhalt
motivation:
one result of the 2013 flood in Germany:
National Flood Protection Program =
Nationales Hochwasserschutzprogramm (NHWSP)

9. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Identification of new protection measures
example: possible dike relocation Schönberg
existing dike
new dike
removal of dike
water level difference gauge bottle neck

10. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Identification of new protection measures
possible new polder locations:
Karthaneniederung (KN)
Lenzer Wische (LW)
test of polder schemes using scaled hydrographs …
… leading to capped hydrographs:
Elbe hydrograph
polder hydrograph
Elbe hydrograph
polder hydrograph
KN
LW

11. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Optimization of existing measures and schemes
Elbe model
(since 2012)
Havel polder model
(since 2016)
Havel-Spree model
(since 2019)
Geesthacht
Tangermünde
Rathenow
Operation of the Havel flood polder system
Wittenberge

12. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Optimization of existing measures and schemes
Operation of the Havel flood polder system
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Vorstellung der Projektergebnisse – Havelberg / Haus der Flüsse – 23.10.2019
Elbemodell
(seit 2014)
Havelpoldermodell
(seit 2016)
Havel-Spree-Modell
(seit 2019)
weir Quitzöbel (usually CLOSED)
weir Gnevsdorf (usually OPEN)
Schafhorst/Twerl
Vehlgast/Flöthgraben
Gr. Grabenniederung
Warnau
Trübengraben
Kümmernitz
designated polder area

13. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Optimization of existing measures and schemes
Operation of the Havel flood polder system
13
Vorstellung der Projektergebnisse – Havelberg / Haus der Flüsse – 23.10.2019
Elbemodell
(seit 2014)
Havelpoldermodell
(seit 2016)
Havel-Spree-Modell
(seit 2019)
weir Quitzöbel (usually CLOSED)
weir Gnevsdorf (CLOSED)
Schafhorst/Twerl
Vehlgast/Flöthgraben
Gr. Grabenniederung
Warnau
Trübengraben
Kümmernitz
operation scheme:
1) close both weirs ahead of extreme flood event

14. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Optimization of existing measures and schemes
Operation of the Havel flood polder system
14
Vorstellung der Projektergebnisse – Havelberg / Haus der Flüsse – 23.10.2019
Elbemodell
(seit 2014)
Havelpoldermodell
(seit 2016)
Havel-Spree-Modell
(seit 2019)
weir Quitzöbel (OPEN)
weir Gnevsdorf (CLOSED)
Schafhorst/Twerl
Vehlgast/Flöthgraben
Gr. Grabenniederung
Warnau
Trübengraben
Kümmernitz
operation scheme:
1) close both weirs ahead of extreme flood event
2) open weir Quitzöbel (using the lower WL in
Havel region to store the Elbe peak discharge)

15. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Optimization of existing measures and schemes
Operation of the Havel flood polder system
Neuwerben (mouth of the Havel)
Havelberg (Havel)
Wittenberge (target gauge at the Elbe)
reference (as in 2013 flood)
optimized (by about 14 cm)

16. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Need for hydraulic modelling on catchment scale
Planned retention measures
in German catchments
controlled retention
uncontrolled retention
Nationales Hochwasserschutzprogramm NHWSP
Overview of proposed measures
Catchment-wide model systems
current status:
• combination of 2D, 1D & hydrological models
run by BfG in cooperation with Federal States
• potential for consolidation and optimisation
Report: BfG-2050
https://doi.bafg.de/BfG/2021/BfG-2050.pdf

17. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Towards the general establishment of 2D-models
Advantages:
consistent model system
comprehensive results
Requirements:
comprehensive input datasets
sufficient human resources
sufficient hardware
best available modelling software
Delft3D is our standard since 2012, however a
comparison of Delft3D FM, HEC-RAS and HydroAS-
2D is being conducted in 2022/2023
HydroAS-2D
work in progress
example of deficit:
• DEM still very time-consuming to update
• production of updated DEM on a regular basis
needed
Ref. M5, BfG

18. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
Hydrological expert tool FLYS
expert tool for display and analysis of hydrologic data and model results
geoportal.bafg.de - to register: FLYS-Fachdienst@bafg.de
current developments:
• 2D-data extension for FLYS
• r-shiny / Q-GIS-tools for exploration of 2D-data
and automated chart-generation

19. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Infrastructure for modeling at BfG
since 2012:
Dell high-performance-cluster
upgraded in two steps
grown system (some parts are 10 years old now)
needs to be replaced
new in 2022/2023:
Dell high-performance-cluster
PowerEdge R7525 (6 x 48 cores)
new storage system 60 TB SSD
investment of 600 000 Euros
main remaining issue:
still no redundancy
(old system will be put out of service)
redundancy urgently needed!
solution:
cloud service as backup and for peak demand
Deltares cloud computing service? Hidde Elzinga (Deltares)
webinar 05 Nov 2021

20. Towards the General Establishment of 2D-Models for German Waterways – Software and Infrastructure
Dr. M. Promny, BfG – Delft3D User Days 2022
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Thank you very much for your attention
dike relocation Lenzen: depth averaged velocities for HQ100