To accurately estimate the extent of damage caused by the 11
March 2011 Tsunami that hit Japan, the actual event has been
modelled with the MIKE 21 tsunami model in the MIKE by DHI software
suite. We have compared the model results with the available remote
sensing information that captured the flood and find good agreement
with the model predictions (Figure 1). The model provides detailed
information of the tsunami propagation even between the satellite
snapshots from space. Moreover, it provides us with the water
velocities and hence allows estimating the wave's impacts on
structures and buildings.
Figure 1: Model
results overlaid on top of the topographic map of Japan. The red
areas highlight the calculated maximum inundation. The smaller maps
show details from within the area marked with a green circle. The
top map shows the inundation as observed from satellite; the bottom
map shows the model results of the same area.
Based on the model results and remote sensing data we are now
able to provide maps of the inundated areas and tsunami impact. The
data can be provided in various grid formats and as kml files for
Google Earth or other GIS systems.
In addition, higher resolution model results can be provided on
request matching client needs provided data exist. The level of
model detail is only limited by the resolution of the available