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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/nhess-2018-276
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2018-276
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 23 Oct 2018

Research article | 23 Oct 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Assessing the tsunami mitigation effectiveness of a planned Banda Aceh Outer Ring Road (BORR), Indonesia

Syamsidik Syamsidik1,4, Tursina Tursina1,3, Anawat Suppasri2, Musa Al'ala1,3, Mumtaz Lutfhi1, and Louise K. Comfort5 Syamsidik Syamsidik et al.
  • 1Tsunami and Disaster Mitigation Research Center (TDMRC), Syiah Kuala University, Jl. Prof. Dr. Ibrahim Hasan, Gampong Pie, Banda Aceh 23233, Indonesia
  • 2International Research Institute of Disaster Science (IRIDeS), Tohoku University, Aramaki Aza-Aoba 468-1, Aoba-ku, Sendai 980-0845, Japan
  • 3Graduate student at Civil Engineering Department, Syiah Kuala University, Jl. Syeh Abdurrauf No. 7, Banda Aceh 23111, Indonesia
  • 4Civil Engineering Department, Syiah Kuala Universi ty, Jl. Syeh Abdurrauf No. 7, Banda Aceh 23111, Indonesia
  • 5Graduate School of Public International Affairs, University of Pittsburgh, Pittsburgh, US

Abstract. This research aimed to assess the tsunami flow velocity and height reduction produced by a planned elevated road spanned parallel to the coast of Banda Aceh called Banda Aceh Outer Ring Road (BORR). Cornell Multi-Grid Coupled Tsunami Model (COMCOT) was used to simulate eight scenarios of the tsunami. One of them was based on the 2004 Indian Ocean tsunami. Two magnitudes of earthquake were used, that is, 8.5 and 9.15Mw. Both the earthquakes were generated from the same source location as in the 2004 case, around the Andaman Sea. Land use data of the innermost layer of the simulation area were adopted based on the 2004 condition and the land use planning of the city for 2029. The results of this study reveal that the tsunami flow depths and flow velocities can be reduced by about 9% by using the elevated road for earthquake magnitude 9.15Mw and about 22% for earthquake magnitude 8.5Mw. Combined with the land use planning 2029, the elevated road could reduce the maximum flow velocities behind the road by about 72%. Notably, the proposed land use for 2029 will not be sufficient to deliver any effects on the tsunami mitigation without the elevated road structures. We recommend the city to construct the elevated road as this could be part of the co-benefit structures for tsunami mitigation. The proposed BORR appears to deliver significant reduction of impacts in the smaller intensity tsunamis compared to the 2004 Indian Ocean tsunami.

Syamsidik Syamsidik et al.
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This research aimed to assess the tsunami flow velocity and height reduction produced by a planned elevated road spanned parallel to the coast of Banda Aceh called Banda Aceh Outer Ring Road (BORR). Cornell Multi-Grid Coupled Tsunami Model (COMCOT) was used to simulate eight scenarios of the tsunami. One of them was based on the 2004 Indian Ocean tsunami. Two magnitudes of earthquake were used, that is, 8.5 and 9.15 Mw. The elevated road is potential to mitigate impacts of future tsunamis.
This research aimed to assess the tsunami flow velocity and height reduction produced by a...
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