Natural Hazards

, Volume 70, Issue 1, pp 415–445

Tsunami inundation in Napier, New Zealand, due to local earthquake sources

  • Stuart A. Fraser
  • William L. Power
  • Xiaoming Wang
  • Laura M. Wallace
  • Christof Mueller
  • David M. Johnston
Original Paper

DOI: 10.1007/s11069-013-0820-x

Cite this article as:
Fraser, S.A., Power, W.L., Wang, X. et al. Nat Hazards (2014) 70: 415. doi:10.1007/s11069-013-0820-x

Abstract

Deterministic analysis of local tsunami generated by subduction zone earthquakes demonstrates the potential for extensive inundation and building damage in Napier, New Zealand. We present the first high-resolution assessments of tsunami inundation in Napier based on full simulation from tsunami generation to inundation and demonstrate the potential variability of onshore impacts due to local earthquakes. In the most extreme scenario, rupture of the whole Hikurangi subduction margin, maximum onshore flow depth exceeds 8.0 m within 200 m of the shore and exceeds 5.0 m in the city centre, with high potential for major damage to buildings. Inundation due to single-segment or splay fault rupture is relatively limited despite the magnitudes of MW 7.8 and greater. There is approximately 30 min available for evacuation of the inundation zone following a local rupture, and inundation could reach a maximum extent of 4 km. The central city is inundated by up to three waves, and Napier Port could be inundated repeatedly for 12 h. These new data on potential flow depth, arrival time and flow kinematics provide valuable information for tsunami education, exposure analysis and evacuation planning.

Keywords

Local tsunamiInundation modellingCOMCOTHikurangi subduction marginStructural damageArrival timeEvacuation

Supplementary material

11069_2013_820_MOESM1_ESM.txt (1 mb)
Supplementary material 1 (TXT 1,024 kb)
11069_2013_820_MOESM2_ESM.txt (2.6 mb)
Supplementary material 2 (TXT 2,624 kb)
11069_2013_820_MOESM3_ESM.txt (2.6 mb)
Supplementary material 3 (TXT 2,657 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Stuart A. Fraser
    • 1
  • William L. Power
    • 2
  • Xiaoming Wang
    • 2
  • Laura M. Wallace
    • 3
  • Christof Mueller
    • 2
  • David M. Johnston
    • 1
    • 2
  1. 1.Massey UniversityWellingtonNew Zealand
  2. 2.GNS ScienceLower HuttNew Zealand
  3. 3.University of TexasAustinUSA