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Tsunami Disaster Mitigation by Integrating Comprehensive Countermeasures in Padang City, Indonesia


Fumihiko Imamura*1, Abdul Muhari*1, Erick Mas*1,
Mulyo Harris Pradono*2, Joachim Post*3,
and Megumi Sugimoto*4


*1Disaster Control Research Center, Tohoku University, Aoba 06-6-11-1106, Sendai 980-8579, Japan
*2The Agency for the Assessment and Application of Technology, Jl. MH, Thamrin 8, Jakarta 10340, Indonesia
*3German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), 82234 Wessling, Germany
*4Earthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan


Received: September 15, 2011

Accepted: December 16, 2011


Keywords: tsunami hazard, tsunami casualty, evacuation model, ground motions

Journal ref: Journal of Disaster Research, Vol.7, No.1 pp. 48-64, 2012

Abstract



This paper describes the results of a comprehensive analysis for tsunami disaster mitigation in Padang City, Indonesia. Assessment consists of several steps, starting from the construction of tsunami hazard maps based on the most probable earthquake scenario in the future. Results are then analyzed to determine the impact on residential population along potential evacuation routes. Next, from the standpoint of hazards, we move to the analysis of human’s vulnerability during evacuation. The term “vulnerability” is associated with available evacuation time. Here, we conducted a static evacuation model using the GIS platform and a dynamic approach using multiagent paradigm. Results of evacuationmodeling suggest that some residents may not have enough time to leave the tsunami inundation area before the first wave comes. We therefore propose using relatively high buildings as vertical evacuation sites. One of potential candidates that survived from a devastated earthquake with 7.6 Mw in 2009 is selected to be further analyzed its antiseismic deficiencies based on design ground motion obtained from micro-tremor analysis and synthesized recorded wave in Padang. As a result, even though the building underwent some damage, the frame structure was able to withstand the shaking and keep the building from collapsing.
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