Tsunami evacuation zones from modelling carried out by Graig Goodier, Hawkes Bay Regional Council.

Red zone is shore exclusion zone; orange zone is evacation area based on 2m wave; yellow zone is evacuation area based on 4m wave.

Modelling was done, and data supplied, in June 2012.

This report provides the results from a series of computer models which simulate

Tsunami Inundation for the coast around Taranaki, from Tongaporutu to Patea.

While most areas along this coast have steep headlands and are not susceptible to

inundation, several communities are built in river estuaries or have coastal exposure,

which carries some risk of inundation. These areas have been studied in this report.

The tsunami waves used in the model are based on the GNS report Review of

Tsunami Hazard and Risk in New Zealand (Berryman, 2005), which indicates the

wave heights for the Taranaki coastline to be approximately 2 m for a 500 year return

period event, and 3 m for a 2500 year return period event. The 84th percentile

envelope (1 standard deviation) for the 2500 year return period event includes a

wave height up to 4.1 m. Using these wave heights as a guide, the present analysis

includes simulations using 2 different wave heights, being 2 m and 4 m in height.