Similar to DSD-INT 2014 - OpenMI Symposium - An operational forecasting system for subsurface floods in the city of Cologne, Moritz Kreyenschulte, RWTH
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Similar to DSD-INT 2014 - OpenMI Symposium - An operational forecasting system for subsurface floods in the city of Cologne, Moritz Kreyenschulte, RWTH (20)
DSD-INT 2014 - OpenMI Symposium - An operational forecasting system for subsurface floods in the city of Cologne, Moritz Kreyenschulte, RWTH
1. 1
An operational forecasting system for subsurface flood in the city of Cologne
Delft Software Days 2014
Dr.-Ing. Daniel Bachmann (Deltares, formerly IWW)
Moritz Kreyenschulte, M.Sc. RWTH (IWW)
Univ.-Prof. Dr.-Ing. Holger Schüttrumpf (IWW)
Institute of Hydraulic Engineering and Water Resources Management (IWW)
RWTH Aachen University
3. 3
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Motivation
Example Elbe flood 2002, city of Dresden time waterlevelh[mNN] 30.07.200230.08.200229.09.200230.10.200229.11.200230.12.200229.01.200301.03.2003103104105106107108109110111112Elbegroundwaterobservationpoint"Hauptbahnhof"
Source: SÄCHSISCHES LANDESAMT FÜR UMWELT UND GEOLOGIE (2003)
Groundwater level
central station
4. 4
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Seepage
Stability
Operational forecasting system for subsurface flood
Objective
Initial- and boundary conditions
Operational forecast
Forecast of groundwater level
Damage mitigation by warning
5. 5
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Coupling of existing software tools and models via OPENMI
Design of the systems
Operational forecast
Prognose Flurabstand
Coupled, numerical system: groundwater with surface water
Forecast of groundwater level
Initial- / boundary conditions
6. 6
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Coupling of existing software tools and models via OPENMI: SOBEK 1D FEFLOW
Design of the systems for Cologne
SOBEK 1D
FEFLOW
FEFLOW
Cologne
7. 7
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Existing models – SOBEK 1D (Deltares)
Ruhr
Lippe
Cologne
Lobith
Bonn
1D-Finite Differences model for surface water flow
OPENMI-compliant
Model operated by BfG (German Federal Institute for Hydrology)
ca. 208 km (Bonn Lobith)
200 m profile distance
8. 8
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
2D-Finite Element model for groundwater flow
Made OPENMI-compliant by development of an interface (IFM)
2 models operated by RheinEnergie AG (left/right)
Existing models – FEFLOW (DHI-WASY)
260 km², 27615 nodes
197 km², 26140 nodes
left
right
9. 9
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Made OPENMI-
compliant by own development
FEFLOW 1
FEFLOW 2
OPENMI
SOBEK 3.1
OPENMI-compliant,
Cooperation with Deltares
FEFLOW i
OPENMI coupling: technical aspects
…
i
Porgrammier- schnitstelle OpenMI
OpenMI wrapper C#
Client
C++, Qt
Server
C++, Qt
Data,
commands
FEFLOW i
Programming Interface IFM
OPENMI
OPENMI wrapper C#
Client
Server
10. 10
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
OPENMI: exchange parameters
Surface flow 1-D
SOBEK
Groundwater flow
FEFLOW
Rhine
left
right
Q
h
h
h
Q
Q
Water level
Discharge
Per time steps
11. 11
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
SOBEK
grid-points
FEFLOW
Leakage-nodes
Coupling via grid points (SOBEK) to Leakage- nodes (FEFLOW)
Preprocessing: Semi- automatic coupling with „nearest-neighbour“- function in ArcMap
Coupling of water level h
12. 12
Delft Software Days 2014 – Coupled surface-subsurface flood modeling
Coupling of discharge Q
Coupling via Leakage- nodes (FEFLOW) to lateral discharge-points (SOBEK)
Preprocessing: Semi- automatic coupling with „nearest-neighbour“- function in ArcMap
SOBEK
lateral discharge -points
FEFLOW
Leakage-nodes
13. 13
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run of the model coupling
Moritz Kreyenschulte, M.Sc.
Test run
14. 14
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Influence factors:
Water level in the river
Duration of the flood event
Initial groundwater level
…
Test runs for different discharges and initial
groundwater level
Test run
Reference: Becker (2013)
15. 15
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run
SOBEK
FEFLOW
q=c⋅(hR-hGW)
Q
hR
16. 16
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
30004000500060007000800090001000011000120003207532085320953210532115Q [m³/s] Time [d]
Test run
0
10
20
0
20000
h [m]
Q [m³/s]
17. 17
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run
Initial conditions groundwater level
18. 18
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run
Q
h
3000400050006000700080009000100001100012000456789101112131432079320843208932094320993210432109 Discharge [m³/s] Water depth [m] Time [d]
h
Q
19. 19
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run
Q
h
3000400050006000700080009000100001100012000456789101112131432079320843208932094320993210432109 Discharge [m³/s] Water depth [m] Time [d]
h
Q
20. 20
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
020004000600080001000012000-120-100-80-60-40-20020406080320703207532080320853209032095321003210532110 Q [m³/s] ΔQ [m³/s] TimeDifferenz Abfluss [oGW-mGW] Abfluss Zulauf
Effluent conditions
Influent
conditions
Test run
woCoupling-wCoupling
outflow BC discharge
21. 21
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run
DLH
EM
WE
8633
Changing of initial conditions 3738394041424344454647320773208232087320923209732102 hG[mNN] Time [d] Water depth river rhineDLHEMWE
22. 22
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Min. distance from ground level [m]
Max. Groundwater level [m]
Test run
23. 23
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run – double peak 30004000500060007000800090001000011000 32077320873209732107321173212732137Discharge[m³/s] Time [d]
24. 24
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Subsurface flood: the creeping flood
Set-up of a coupled 1d-hydraulic model with groundwater models via OPENMI
First results of the coupled system for the Cologne area
Further validation and calibration of the model during high water in river Rhine
Summary and Outlook
25. 25
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
An operational forecasting system for subsurface flood in the city of Cologne
Delft Software Days 2014
Dr.-Ing. Daniel Bachmann (Deltares, formerly IWW)
Moritz Kreyenschulte, M.Sc. RWTH (IWW)
Univ.-Prof. Dr.-Ing. Holger Schüttrumpf (IWW)
Institute of Hydraulic Engineering and Water Resources Management (IWW)
RWTH Aachen University
26. 26
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Back Up
27. 27
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Next steps:
Further validation and calibration of the model during high water in river Rhine
Set up of groundwater measuring stations with data logger
Possibilities:
Model can be used for forecasting / scenario analysis / urban land-use planning
Flood risk maps for groundwater
Applications of results
28. 28
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Test run – Scenario 3 30004000500060007000800090001000011000 32077320873209732107321173212732137Discharge[m³/s]Time [d]
29. 29
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
37
38
39
40
41
42
43
44
45
46
32077
32087
32097
32107
32117
32127
hG [mNN]
Time [d]
Water depth river rhine
DLH
EM
WE
Validation – Scenario 3
DLH
EM
WE
8633
Changing of initial conditions
30. 30
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Time of occurence of the maximum groundwater levels [d]
Validation – Scenario 3 01000200030004000500060007000-1010305070 Numberofpoints Time ofoccurenceofmax. h [d]
31. 31
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
hR (SOBEK)
Direction of flow
River rhine
Groundwater
Q (FEFLOW)
Test run
Leakage
activated
() ⋅ −⋅= smmhhcqGR ³ 1
32. 32
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
hR (SOBEK)
Direction of flow
River rhine
Groundwater
Q (FEFLOW)
Test run
Leakage
activated () ⋅ −⋅= smmhhcqGR ³ 1
33. 33
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Initial conditions
Using data from X measuring stations
Automatic optimization using an ant colony algorithm
Boundary conditions
Are set in the existing models
Stationary BC
Changes to well BC shall be considered
Precipitation should be taken into account
Additional flood plains in the hinterland should be taken into account
Groundwater model
34. 34
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Initial conditions
Measured water level at measuring stations
Interpolation using „Kölner Pegel“
Generated set up gained from calculations
Does it matter? Do the results change significantly?
Boundary conditions
Forecast of discharge at the city of Bonn
Forecast is done by Hochwassermeldezentrum Mainz (Flood report Centre Mainz)
River Rhine
35. 35
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
Auto boot of all models by OpenMI
Automatic input of initial conditions (FEFLOW)
Automatic input of ground level (digital terrain model)
Output of (max.) groundwater levels, (min.) distance of groundwater table to surface, time of occurence of max. groundwater levels (FEFLOW-Client)
Output of OpenMI-exchange parameter (h, Q) for every node and timestep
Output of log-files for Client and Server
Error-Treatment
Additional implementations
36. 36
Delft Software Days 2014 – Coupled surface-subsurface flood modelling
SOBEK
FEFLOW
GUI OpenMI
OpenMI coupling
Additional information in shell