source: anuga_work/production/onslow_2006/report/execsum.tex @ 3569

Last change on this file since 3569 was 3404, checked in by sexton, 19 years ago

incorporating more of TD's comments

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1This report is being provided to the Fire and Emergency Services Authority
2(FESA) as part of the Collaborative Research Agreement (CRA)
3with Geoscience Australia (GA).
4FESA has recognised the potential vulnerability of the Western Australia
5coastline to tsunami originating from earthquakes on
6the Sunda Arc subduction zone.
7There is historic evidence of tsunami affecting the
8Western Australia coastline, \cite{CB:ausgeo},
9and FESA has sought to assess
10the relative risk of its urban and regional communities to the tsunami
11threat and develop detailed response plans for a range of plausible events.
12
13This report describes the modelling methodology and initial results
14for a specific tsunami-genic event as it impacts the Onslow township
15and its surrounds. In particular, maximum inundation maps are shown
16and discussed
17for the event occurring at mean sea level as well as
18highest and lowest astronomical tide. The inundation results allow
19estimation of the number of houses inundated and collapsed, as well as
20the numbers of persons affected. The Onslow township has approximately
21350 residential structures and a population of around 800.
22For this specific event at high tide, approximately
23100 houses are inundated with two of those collapsing. Approximately
2415-20\% of the population will sustain injuries, including fatalities.
25
26Future studies
27will present a series of scenarios for a range of return periods to
28assist FESA in developing appropriate plans for a range of event impacts.
29This will also allow an assessment of the relative tsunami risk
30to communities along the NW Shelf of WA.
31This report and the decision support tool are the
32June 2006 deliverables of the Collaborative Research Agreement,
33Tsunami Impact Modelling for WA, between FESA and GA.
34
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