Link 2.3. - Flood modelling and mapping

1. • Finnish Environment Institute can
provide flood mapping services or
training package!
• Completely hands-on training is
prepared on the pilot area and
data provided by the trainees
Preparing river
geometry
Hydraulic
modelling
Flood hazard
mapping
Flood risk
mapping
Hydraulic modelling and flood
mapping services and trainings
Input for management
and rescue planning
1
2
3
4

2. From hydrological to hydrodynamic
simulation and flood maps
Discharge to
the flood plain
Hydrological
simulation
Temperature
Precipitation
Hydrodynamic
simulation
Water depth
in the flood
plain
Discharge and
water level
observations
Flood risk
map

3. Preparing river geometry (~2 days)
• Assembling of the hydraulic model geometry
from the river bathymetry and floodplain
elevation data e.g. based on digital elevation
model
• Tools: ArcGIS or QGIS (open source) and
HEC-RAS (available free of charge)
Hydraulic modelling (~5 days)
• Preparing the HEC-RAS model based on the
geometry, 1D or 2D-modelling (optional
analyses: dam breach, river ice, lake
regulation)
• Calibration of the model and simulation of the
desired scenarios, inc. uncertainty analyses
The specifications of the examples
of the hands-on training packages
1
2

4. Flood mapping (~3 days)
• Producing flood hazard maps for different
scenarios based on the water levels calculated
by hydraulic model and elevation model
• Finalization steps
• ArcGIS or QGIS software
Flood risk mapping and publishing
the maps (~4 days)
• Combining flood hazard zones with vulnerability
information and producing flood risk maps and
flood damage estimations (statistics)
• Publishing the flood maps as a map service
+ helpdesk between and after the trainings
+ step by step manuals
3
4

5. • Producing surface water flood
maps for urban rainstorm floods
• The hydrodynamic model based on
time dependent precipitation and
elevation model as input data
• Powerful computing
• SYKE produces pluvial flood maps
for all urban and suburban areas in
Finland 2017-2018
Modelling and mapping for pluvial floods

6. Recent references
• Andean countries, 2016
• Latvia, 2015
• China, Guoandong, 2014
• Georgia, 2012-2014
• Several trainings in Finland
More information:
environment.fi/floodmaps
floodmapping@environment.fi