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Home arrow Articles by Topic arrow Tsunami arrow Tsunami Modelling Study 2
Tsunami Modelling Study 2 PDF Print
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Articles - Tsunami
Written by Steve Marshall   
Sunday, 25 July 2010

Ngunguru: Maximum inundation speed (upper) and depth (lower) plots for the Mw9.0 Tonga-Kermadec subduction zone scenario at mean high water springs.

Executive Summary

Northland Regional Council contracted NIWA to undertake an initial study on the risk of tsunami inundation facing communities in the Northland Region.

The following credible sources were identified:

  • Remote source: South American origin. Return period 50-100 years. This represents the most probable tsunami risk in the next 100 years.

  • Local/Region: Tonga Kermadec. Two events were modelled, Mw 8.5 and Mw 9.0. The return period of these events is much longer (500-2000 years) but these represent a worst-case scenario for a tsunami striking the Northland coast.

Tsunami propagation from these scenarios to the Northland coastline was simulated using a computermodel and subsequent inundation at fifteen specific communities was modelled. The simulations were performed for current sea levels and for a mean sea level elevated by 50 cm, representing the 100 year projection by the IPCC Fourth Assessment Report.

Full story...

View detailed information about the effect on Ngunguru

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Last Updated ( Sunday, 25 July 2010 )
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