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
Content slide
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
Content slide, two columns with image
Before After DTM with shape file
Principal solution - I
Input Shapes Clipper Inside
Clipper Outside Input Raster
Clipper Transformer
RasterCellReplacer
Change value to 5
RasterCellValueCalcualtor
Operator +
5
5
5
DTM + 5
Principal solution - II
RasterMosaicker
RasterCellValueCalcualtor
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
Content slide, with top bar image
Principal solution - I
Raster Flood Result
Shape file with flood islands
Excel file with statistics
Input Output
Principal solution - II
Raster Flood Result
RasterCellCoercer
RasterExtentsCoercer
- Data Extents
PointOnAreaOverlayer
- Count overlaps
- Create a list of the
flood depth in each
point
Count List
Principal solution - III
PointOnAreaOverlayer
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_Å
1_M
Q21
00_2
6t_S
B_Å
1_H
Q21
00_2
6t_S
B_Å
1_M
Q21
00_1
0t_S
B_Å
1_H
Q21
00_1
0t_S
B_Å
1_M
Q21
00_1
0t_Ö
B_Å
1_H
Q21
00_1
0t_Ö
B_Å
1_H
Q21
00_2
6t_S
_P26
B_Å
2_M
Q21
00_2
6t_S
B_Å
2_H
Q21
00_2
6t_S
B_Å
2_M
Q21
00_1
0t_S
B_Å
2_H
Q21
00_1
0t_S
Are
a (
m2
) /
Vo
lym
(m
3)
Scenario
Översvämmad yta (m2) Volym av översvämmat vatten (m3)
Thank You!
! Questions?
! For more information: ! Henrik Thorén, [email protected] ! Rambøll
! www.ramboll.com ! www.ramboll.com/worldwide
CONNECT. TRANSFORM. AUTOMATE.
Recommended
