Starting in 2005, the GITEWS project (German-Indonesian Tsunami Early
Warning System) established from scratch a fully operational tsunami
warning system at BMKG in Jakarta.
Numerical simulations of prototypic tsunami scenarios play a decisive
role in a priori risk assessment for coastal regions and in the
early warning process itself. Repositories with currently 3470
regional tsunami scenarios for GITEWS and 1780 Indian Ocean wide
scenarios in support of Indonesia as a Regional Tsunami Service Provider (RTSP)
were computed with the non-linear shallow water modell TsunAWI.
It is based on a finite element discretisation, employs unstructured
grids with high resolution along the coast and includes inundation.
This contribution gives an overview on the model itself, the
enhancement of the model physics, and the experiences gained during the
process of establishing an operational code suited for thousands of
model runs. Technical aspects like computation time, disk space needed
for each scenario in the repository, or post processing techniques have
a much larger impact than they had in the beginning when TsunAWI
started as a research code. Of course, careful testing on artificial
benchmarks and real events remains essential, but furthermore, quality
control for the large number of scenarios becomes an important issue.
EPIC Alfred Wegener Institut