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IJSTR >> Volume 9 - Issue 3, March 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Intergrated Approach Of Tsunami Vulnerability Assessment At Coastal Area Of Kalianda Sub District, South Lampung District, Lampung Province, Indonesia

[Full Text]



Muhammad Helmi, Yola Hardiyani Pholandani, Heryoso Setiyono, Anindya Wirasatriya, Warsito Atmodjo, Rikha Widyaratih, Agus Anugroho Dwi Suryoputro



tsunami, numerical model, geospastial, vulnerability, and Lampung.



Kalianda Subdistrict is a densely populated area located in the coastal area of South Lampung District, Lampung Province. Its location is only 323.6 km to the confluence zone of the tectonic plate of Sunda Strait Megathrust which makes this area is vulnerable from the tsunami disaster. The present study aims to simulate the tsunami wave propagation from the epicenter to the coastal area of Kalianda by using a numerical 2D model and to produce a tsunami vulnerability index map of Kalianda Subdistrictce by using geospatial modeling. The simulation result shows that 35 minutes after the tectonic earthquake, sea level drops for 40 minutes. The lowest sea level is -4.8 m from MSL at 73th minutes after the earthquake. After that, the first tsunami wave is formed at 84th minutes after the earthquake reaching 8.5 m height. Sea level drops slightly before the second tsunami wave occurs after at 93rd minutes after the earthquake reaching 12.5 m height. The tsunami vulnerability index map shows that the middle part of the coastal area of Kalianda is the most vulnerable area. It has the level of vulnerable and very vulnerable. The areas categorized as vulnerable observed until 5 km to the land. This area is coastal plain with low and flat elevation and the morphology of this area is a gulf shape. This research also manages to identify evacuation sites. The evacuation sites spread close to the vulnerable areas which easily can be reached by the people during tsunami attack..



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