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CONNECT. TRANSFORM. AUTOMATE.
FME Usage In Dynamic Flood
Calculation
Henrik Thorén
Civilengineer, Hydraulic Specialist
Rambøll
!  Engineering consultancy
company
!  Around 10 000
employees worldwide
!  Originates from Denmark
!  Denmark, Sweden,
Norway, Finland and
United Kingdom
!  About 200 offices in 20
countries
C
Bella Sky
Hotel
Rambøll Head Office
Femer Bælt Tunnel
Henrik Thorén
!  Sweden
!  Climate Adaption and
Storm Water Management
!  Dynamic flood mapping
with DHI software (Danish
Hydrology Institute)
!  MIKE Urban, MIKE 11 and
MIKE 21
!  2-way and 3-way coupling
(MIKE Flood)
!  FME and ArcGIS
!  Hydro model for
Gothenburg
!  Manipulation of DTM
!  Post Process flood results
Agenda
Manipulate DTM
!  In a DTM, buildings are
“cut” away and a flat
surface is interpolated
over the area that the
house covers
!  In flood calculation,
buildings are structures
that will redirect the flow
of the water, thus
buildings have to be
projected in the DTM
Manipulation of DTM
C
Before AfterDTM with
shape file
Principal solution - I
Input Shapes Clipper Inside
Clipper OutsideInput Raster
Clipper
Transformer
RasterCell
Replacer
Change
value to 5
RasterCellValue
Calcualtor
Operator +
5
5
5
DTM + 5
Principal solution - II
RasterMosaicker
RasterCellValue
Calcualtor
Operator +
Clipper Outside
DTM + 5
FME solution
Post process flood results
!  The main purpose is to
calculate the volume of
the flooded water and the
flooded area
!  As a bonus, this can be
done for each “flood
island” or to a specific
area.
!  The workspace can
analyse multiple flood
results independently in
the same workspace
C
Principal solution - I
Raster Flood
Result
Shape file with
flood islands
Excel file with
statistics
Input Output
Principal solution - II
Raster Flood
Result
RasterCell
Coercer
RasterExtents
Coercer
- Data Extents
PointOnArea
Overlayer
- Count
overlaps
- Create a
list of the
flood depth
in each
point
Count
List
Principal solution - III
PointOnArea
Overlayer
Count
List
PythonCaller +
AttributeCreator
- Calculate the total
flooded area and
volume of the
flooded water
Shape file
Excel file
FME solution - I
FME solution - II
!  Statistics in excel format
that can be presented in
diagrams
Results
0
500000
1000000
1500000
2000000
2500000
3000000
B_Å1_MQ2100_2
6t_S
B_Å1_HQ2100_2
6t_S
B_Å1_MQ2100_1
0t_S
B_Å1_HQ2100_1
0t_S
B_Å1_MQ2100_1
0t_Ö
B_Å1_HQ2100_1
0t_Ö
B_Å1_HQ2100_2
6t_S_P26
B_Å2_MQ2100_2
6t_S
B_Å2_HQ2100_2
6t_S
B_Å2_MQ2100_1
0t_S
B_Å2_HQ2100_1
0t_S
Area(m2)/Volym(m3)
Scenario
Översvämmad yta (m2) Volym av översvämmat vatten (m3)
Thank You!
!  Questions?
!  For more information:
!  Henrik Thorén, hent@ramboll.com
!  Rambøll
!  www.ramboll.com
!  www.ramboll.com/worldwide
CONNECT. TRANSFORM. AUTOMATE.

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FME Usage in Dynamic Flood Calculations

  • 1. CONNECT. TRANSFORM. AUTOMATE. FME Usage In Dynamic Flood Calculation Henrik Thorén Civilengineer, Hydraulic Specialist
  • 2. Rambøll !  Engineering consultancy company !  Around 10 000 employees worldwide !  Originates from Denmark !  Denmark, Sweden, Norway, Finland and United Kingdom !  About 200 offices in 20 countries C Bella Sky Hotel Rambøll Head Office Femer Bælt Tunnel
  • 3. Henrik Thorén !  Sweden !  Climate Adaption and Storm Water Management !  Dynamic flood mapping with DHI software (Danish Hydrology Institute) !  MIKE Urban, MIKE 11 and MIKE 21 !  2-way and 3-way coupling (MIKE Flood) !  FME and ArcGIS !  Hydro model for Gothenburg
  • 4. !  Manipulation of DTM !  Post Process flood results Agenda
  • 5. Manipulate DTM !  In a DTM, buildings are “cut” away and a flat surface is interpolated over the area that the house covers !  In flood calculation, buildings are structures that will redirect the flow of the water, thus buildings have to be projected in the DTM
  • 6. Manipulation of DTM C Before AfterDTM with shape file
  • 7. Principal solution - I Input Shapes Clipper Inside Clipper OutsideInput Raster Clipper Transformer RasterCell Replacer Change value to 5 RasterCellValue Calcualtor Operator + 5 5 5 DTM + 5
  • 8. Principal solution - II RasterMosaicker RasterCellValue Calcualtor Operator + Clipper Outside DTM + 5
  • 10. Post process flood results !  The main purpose is to calculate the volume of the flooded water and the flooded area !  As a bonus, this can be done for each “flood island” or to a specific area. !  The workspace can analyse multiple flood results independently in the same workspace C
  • 11. Principal solution - I Raster Flood Result Shape file with flood islands Excel file with statistics Input Output
  • 12. Principal solution - II Raster Flood Result RasterCell Coercer RasterExtents Coercer - Data Extents PointOnArea Overlayer - Count overlaps - Create a list of the flood depth in each point Count List
  • 13. Principal solution - III PointOnArea Overlayer Count List PythonCaller + AttributeCreator - Calculate the total flooded area and volume of the flooded water Shape file Excel file
  • 16. !  Statistics in excel format that can be presented in diagrams Results 0 500000 1000000 1500000 2000000 2500000 3000000 B_Å1_MQ2100_2 6t_S B_Å1_HQ2100_2 6t_S B_Å1_MQ2100_1 0t_S B_Å1_HQ2100_1 0t_S B_Å1_MQ2100_1 0t_Ö B_Å1_HQ2100_1 0t_Ö B_Å1_HQ2100_2 6t_S_P26 B_Å2_MQ2100_2 6t_S B_Å2_HQ2100_2 6t_S B_Å2_MQ2100_1 0t_S B_Å2_HQ2100_1 0t_S Area(m2)/Volym(m3) Scenario Översvämmad yta (m2) Volym av översvämmat vatten (m3)
  • 17. Thank You! !  Questions? !  For more information: !  Henrik Thorén, hent@ramboll.com !  Rambøll !  www.ramboll.com !  www.ramboll.com/worldwide CONNECT. TRANSFORM. AUTOMATE.