Nat. Hazards Earth Syst. Sci., 19, 299–312, 2019 https://doi.org/10.5194/nhess-19-299-2019 © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License. Assessing the tsunami mitigation effectiveness of the planned Banda Aceh Outer Ring Road (BORR), Indonesia Syamsidik1,4, Tursina1,3, Anawat Suppasri2, Musa Al’ala1,3, Mumtaz Luthfi1, and Louise K. Comfort5 1Tsunami and Disaster Mitigation Research Center (TDMRC), Syiah Kuala University, 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 3Civil Engineering Department, Syiah Kuala University, Jl. Syeh Abdurrauf No. 7, Banda Aceh 23111, Indonesia 4Civil Engineering Department, Faculty of Engineering, Syiah Kuala University, Jl. Syeh Abdurrauf No. 7, Banda Aceh 23111, Indonesia 5Graduate School of Public International Affairs, University of Pittsburgh, Pittsburgh, USA Correspondence: Syamsidik (
[email protected],
[email protected]) Received: 24 September 2018 – Discussion started: 23 October 2018 Revised: 5 January 2019 – Accepted: 7 January 2019 – Published: 31 January 2019 Abstract. This research aimed to assess the tsunami flow ve- the elevated road as this could be part of the co-benefit struc- locity and height reduction produced by a planned elevated tures for tsunami mitigation. The proposed BORR appears to road parallel to the coast of Banda Aceh, called the Banda deliver a significant reduction of impacts of the smaller inten- Aceh Outer Ring Road (BORR). The road will transect sev- sity tsunamis compared to the 2004 Indian Ocean tsunami. eral lagoons, settlements, and bare land around the coast of Banda Aceh.