Multi-Risk Assessment and Cascading Effects Analysis in cooperation between Indonesia and Germany – Joint Research on Volcanic and Landslide induced Tsunamis

Lead Prof. Dr.-Ing. habil. Nils Goseberg
Team Hajo von Häfen, M.Sc.
Dr.-Ing. David Schürenkamp
Funding Bundesministerium für Bildung und Forschung (BMBF)
Duration 04/2021 - 03/2024
Website www.tsunami-risk.de
Partners Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
Freie Universität Berlin (FU)
Technische Universität Berlin (TU-B)
Bundesanstalt Technisches Hilfswerk (THW)
Universitas Indonesia (UI)
Institut Teknologi Bandung (ITB)
Universitas Gadjah Mada (UGM)
Indonesian Institute of Sciences (LIPI)
Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG)
National Institute of Aeronautics and Space (LAPAN)
The Agency for the Assessment & Application of Technology (BPPT)
National Disaster Management Authority (BNPB)
Deutsches Institut für Entwicklungspolitik (DIE)
Indian Ocean Tsunami Information Centre (IOTIC)

Brief Description

Indonesia experienced two devastating tsunami disasters in 2018, which were triggered as part of cascading events: In September, 28 at Palu, Island of Sulawesi, the cascade consisted of an earthquake - liquefaction - landslide - tsunami sequence, while on December, 22 after a longer period of volcanic activity, a flank failure occurred at Anak Krakatau, which in turn triggered a tsunami. The existing tsunami early warning system, which was designed for the detection of seismic-induced tsunami, was not able to provide efficient warning alerts in those cases. It has been recognized that the two tsunami events, Palu and Anak Krakatau, can serve as real-world laboratories for a better understanding of the underlying processes and possible solutions for comparable multi-risk scenarios with cascading events in Indonesia and beyond. A new strategy for detection and early warning of nonseismic generated tsunami has to be developed. In this contect, the project TSUNAMI_RISK aims to achieve major contributions in three different focus areas: 1) Geo-scientific research, 2) Socio-scientific research and 3) Policy recommendations and transfer to practice.

The Leichtweiß-Institute will take part in 1) Geo-scientific research leading work package 330 which is described as follows:

WP 330Modelling of tsunami generation and propagation aims at the improvement of the knowledge on the physical processes with the following tsunami triggering mechanisms: (i) volcano flank instability due to volcanic eruption, (ii) earthquake-induced landslide. Two past tsunami events will be investigated both experimentally and numerically, using the results of the previous wor packages with respect to the local topo-bathy data, instability pattern, geological properties of the collapse material and slide kinematics. The experimental investigations will be conducted in a 3D wave basin and 2D wave flume focussing on tsunami generation and propagation near its source with an improved, more realistic reproduction of the development of the volcano/slope instability as compared to the currently applied lab procedure. The volcano and slope models will feature innovative instability zone modelling (artificial shear weakening). The interaction of the collapse mass with the water, resulting in tsunami generation, will be analysed with sophisticated 3D numerical model.