Interdisciplinary Geosciences - Distinguished Lecture
Title: Estimating Future Impacts of Tsunami on The Northern Part of Aceh-Indonesia: A way to Increase Tsunami Risk Understanding, 20 Years After the 2004 Aceh Tsunami


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Syamsidik SYAMSIDIK

Syiah Kuala University

Speaker Biography

Director of Tsunami and Disaster Mitigation Research Center (TDMRC) of Universitas Syiah Kuala (USK) in Banda Aceh-Indonesia. He is also a full professor in hydraulic engineering at Civil Engineering Department at Universitas Syiah Kuala. He obtained his Doctoral Degree from Toyohashi University of Technology-Japan in 2009 majoring in Coastal Engineering. Master Degree was obtained from University Sains Malaysia in 2004, majoring in Coastal Environmental Modelling. His research focuses are coastal engineering, numerical modelling for coastal area, tsunami modelling and disaster preparedness. Prof. Syamsidik has been involved in a number of regional research activities, such as Strengthening Resilience of Coastal and Small Islands Communities towards Hydro-meteorological Hazards and Impacts of Climate Change (StResCOM), funded by UNESCO-Japan Funds-in Trust, Partnership of Enhanced Engagement in Researches (PEER) sponsored by USAID-National Academies of Sciences, Engineering and Medicines (NASEM) of United States (Cycles 3 and 5). In recent years, he has been a visiting scholar at Tohoku University (2018 and 2019), Georgia Institute of Technology (2017 and 2021), Brunel University (2020), and at University of Pittsburgh (2017). Currently, He is collaborating with School of Meteorological, Climatology, and Geophysics of Indonesia (STMKG) on developing physical models of non-seismic tsunami modelling for Palu Bay and tsunami propagation for Southern Java of Indonesia. His research center website can be seen at: https://tdmrc.usk.ac.id


Abstract

Impacts of the 2004 Aceh Tsunami were massive and has been influential on coastal communities until this day. This presentation will elaborate recent tsunami risk on buildings around coastal area of northern part of Aceh. Cornell Multigrid Coupled Tsunami Model (COMCOT) was used to simulate future tsunami events generated by earthquakes from the Aceh-Andaman Megathrust Segment. A series of field surveys were performed between 2023 until mid of 2024 to assess over 430,000 buildings at 7 districts in Aceh. The buildings were classified following Hazard United States (HAZUS) method. Damage ratios were calculated by combining vulnerability curves (derived from a series of tsunami fragility curves) where tsunami flow depths were taken as the hydrodynamic component for the curves. Losses were provided by means of Probable Maximum Losses (PML) and Average Annual Losses (AAL). Event Loss Table method was used to calculate the PML and AAL. Later, we also analyzed the suitability of the building locations-based tsunami hazards. It was found that majority of buildings in study area were confined masonry buildings. The effects of the future tsunami to Banda Aceh, the largest city in Aceh, will be almost similar to what happen in 2004 tsunami event considering not much spatial modifications around its coastal areas and no specific structural mitigation measures have been constructed to reduce the destructive effects of future tsunamis.





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