Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Comparison of tsunami risk assessment based on seismic and landslide generated tsunamis for the Marmara Coast of Istanbul
Date
2019-04-07
Author
Tüfekçi Enginar, Duygu
Süzen, Mehmet Lütfi
Kolat, Çağıl
Yalçıner, Ahmet Cevdet
Metadata
Show full item record
Item Usage Stats
310
views
0
downloads
Cite This
A high resolution tsunami vulnerability and risk assessment have been performed for the Marmara coast of the megacity of Istanbul by using the MeTHuVA (METU Metropolitan Tsunami Human Vulnerability Assessment) Method (Tufekci et al., 2018) considering seismic and non-seismic (submarine landslide) tsunami sources in the sea of Marmara. The 28 September 2018, Mw7.5 strike-slip Sulawesi, Indonesia earthquake triggered an unexpected tsunami and caused damage and loss of lives in Palu Bay. The observed tsunami heights are higher than the estimations from seismic sources and the generation mechanisms of this tsunami has not been well understood yet. Therefore, possible coastal sector collapses and/or subaerial/submarine landslides should also be considered as sources of this event. On the other hand, Palu event reminded 17 August 1999, Mw7.4 strike-slip Izmit, Turkey earthquake and associated tsunami event in the eastern end of Marmara Sea Izmit Bay where coastal collapses generated tsunami. These both events have similarities on the strike-slip type of the faulting mechanisms, and the tsunamis generated by submarine landslides that are probably triggered by earthquakes. These two similar events reveal the importance of landslide generated tsunamis and their destructive impact on coastal areas. North Anatolian Fault (NAF) is a dextral strike-slip fault that located along northern Anatolia and several earthquakes along NAF have shown its westward migration since 1939. Considering the earthquake in 1912 on Ganos segment, western part of NAF, a seismic gap in Marmara Sea can be recognized. Even the faulting system shows strike-slip motion, a possible future rupture on this seismic gap may trigger a submarine landslide(s). The impacts of above mentioned events, point out the strong possibility of tsunami generation by the landslides triggered by strike-slip faults which are the main character of the faults in the region. Therefore, landslides should be one of the main components in tsunami vulnerability and risk assessments on the coasts of Marmara Sea, especially in the megacity Istanbul. In this study, three conditions are evaluated, seismic and landslide triggered tsunamis separately and the condition of these two occurred simultaneously. According to these conditions, tsunamis are simulated, their hazard level and vulnerability analysis are performed and tsunami risk maps are plotted. The outputs are compared in the direction of better assessment of vulnerability and risk. The results are presented and discussed to help increasing preparedness of the megacity ˙Istanbul against possible tsunamis in the Marmara Sea. Acknowledgement: MSc. Bora Yalciner and Assoc. Prof. Dr. Andrey Zaytsev are acknowledged for their contributions in developing tsunami numerical model NAMI DANCE used in this study. We also thank Istanbul Metropolitan Municipality for providing high quality data and close cooperation
Subject Keywords
Tsunami
,
Vulnerability
,
Risk assessment
,
Landslide
,
Numerical modeling
,
High-resolution
,
Preparedness
URI
https://meetingorganizer.copernicus.org/EGU2019/EGU2019-1531.pdf
https://hdl.handle.net/11511/74997
Conference Name
EGU General Assembly 2019, (07 - 12 Nisan 2019)
Collections
Department of Geological Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Possible worst-case tsunami scenarios around the Marmara Sea from combined earthquake and landslide sources
Latcharote, Panon; Suppasri, Anawat; Imamura, Fumihiko; Aytore, Betul; Yalçıner, Ahmet Cevdet (2016-12-01)
This study evaluates tsunami hazards in the Marmara Sea from possible worst-case tsunami scenarios that are from submarine earthquakes and landslides. In terms of fault-generated tsunamis, seismic ruptures can propagate along the North Anatolian Fault (NAF), which has produced historical tsunamis in the Marmara Sea. Based on the past studies, which consider fault-generated tsunamis and landslide-generated tsunamis individually, future scenarios are expected to generate tsunamis, and submarine landslides cou...
Preliminary estimation of the tsunami hazards associated with the Makran subduction zone at the northwestern Indian Ocean
Heidarzadeh, Mohammad; Pirooz, Moharram D.; Zaker, Nasser H.; Yalçıner, Ahmet Cevdet (2009-02-01)
We present a preliminary estimation of tsunami hazard associated with the Makran subduction zone (MSZ) at the northwestern Indian Ocean. Makran is one of the two main tsunamigenic zones in the Indian Ocean, which has produced some tsunamis in the past. Northwestern Indian Ocean remains one of the least studied regions in the world in terms of tsunami hazard assessment. Hence, a scenario-based method is employed to provide an estimation of tsunami hazard in this region for the first time. The numerical model...
Numerical assessment of tsunami attack on a rubble mound breakwater using OpenFOAM (R)
GÜLER, HASAN GÖKHAN; Baykal, Cüneyt; Arikawa, Taro; Yalçıner, Ahmet Cevdet (2018-03-01)
A numerical assessment study of tsunami attack on the rubble mound breakwater of Haydarpasa Port, located at the southern entrance of the Istanbul Bosphorus Strait in the Sea of Marmara, Turkey, is carried out in this study using a Volume-Averaged Reynolds-Averaged Navier-Stokes solver, IHFOAM, developed in OpenFOAM (R) environment. The numerical model is calibrated with and validated against the data from solitary wave and tsunami overflow experiments representing tsunami attack. Furthermore, attack of a p...
Tsunami risk and strategies for the European region (TRANSFER)
Yalçıner, Ahmet Cevdet(2009-10-30)
The project main goal is to contribute to our understanding of tsunami processes in the Euro-Mediterranean region, to the tsunami hazard and risk assessment and to identifying the best strategies for reduction of tsunami risk. Focus will be posed on the gaps and needs for the implementation of an efficient tsunami early warning system (TEWS) in the Euro-Mediterranean area, which is a high-priority task in consideration that no tsunami early warning system is today in place in the Euro-Mediterranean countrie...
A New Tool for Inundation Modeling: Community Modeling Interface for Tsunamis (ComMIT)
Titov, V. V.; Moore, C. W.; Greenslade, D. J. M.; Pattiaratchi, C.; Badal, R.; Synolakis, C. E.; Kanoğlu, Utku (2011-11-01)
Almost 5 years after the 26 December 2004 Indian Ocean tragedy, the 10 August 2009 Andaman tsunami demonstrated that accurate forecasting is possible using the tsunami community modeling tool Community Model Interface for Tsunamis (ComMIT). ComMIT is designed for ease of use, and allows dissemination of results to the community while addressing concerns associated with proprietary issues of bathymetry and topography. It uses initial conditions from a precomputed propagation database, has an easy-to-interpre...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
D. Tüfekçi Enginar, M. L. Süzen, Ç. Kolat, and A. C. Yalçıner, “Comparison of tsunami risk assessment based on seismic and landslide generated tsunamis for the Marmara Coast of Istanbul,” presented at the EGU General Assembly 2019, (07 - 12 Nisan 2019), Viyana, Avusturya, 2019, Accessed: 00, 2021. [Online]. Available: https://meetingorganizer.copernicus.org/EGU2019/EGU2019-1531.pdf.