1 | The Fire and Emergency Services Authority (FESA) of Western Australia and |
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2 | associated volunteers respond to a wide range of emergencies |
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3 | as well as undertaking search and rescue operations on land and |
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4 | water\footnote{http://www.fesa.wa.gov.au/internet/}. |
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5 | FESA helps the West Australian |
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6 | community prepare, prevent (where possible) and respond safely to disasters. |
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7 | FESA also aims to reduce injury, loss of life and destruction of property in |
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8 | Western Australian communities through proactive measures. |
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9 | These measures involve understanding the relative risk |
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10 | of the disaster so that resources can be directed to appropriate areas |
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11 | and corresponding evacuation plans put in place. |
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12 | |
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13 | The key role of the Risk Research Group at Geoscience Australian |
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14 | is to develop knowledge on the risk from natural and |
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15 | human-caused hazards for input to policy and operational decision making on |
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16 | the mitigation of risk to Australian communities. The Group achieves |
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17 | this through the development of computational methods, models and decision |
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18 | support tools that assess the hazard, vulnerability and risk posed by hazard |
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19 | events. To develop an understanding of the tsunami risk, GA has developed |
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20 | decision support tools, consisting of inundation |
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21 | maps overlaid on aerial photography of the region |
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22 | detailing critical infrastructure as well as damage modelling estimates. |
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23 | |
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24 | This report details the impact assessments for a range of tsunami events. |
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25 | These events are based on the probabilistic hazard assessment conducted |
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26 | for the Western Australian coastline. A number of events are selected for |
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27 | return periods of 500, 1000 and 2000 years, see Section \ref{sec:tsunamiscenario}. |
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28 | %This report is the first in a series of tsunami assessments |
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29 | %of the North West Shelf. The scenario used for this study has |
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30 | %an unknown return period, but is considered a plausible event (see |
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31 | %Section \ref{sec:methodology}). |
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32 | %Subsequent assessments will use refined hazard models with |
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33 | %associate return periods. A suite of assessments will be |
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34 | %made for Onslow and other localities, as advised by FESA. |
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35 | |
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36 | Onslow has a population of around 800 and |
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37 | is part of the Shire of Ashburton in the Pilbara region of |
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38 | Western Autralia\footnote{http://www.pdc.wa.gov.au/region/political.htm}. |
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39 | Onslow supports |
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40 | a variety of industries, including oil, gas, mining, cattle, |
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41 | fishing and tourism. |
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42 | |
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43 | The modelling technique to simulate the |
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44 | impact ashore is discussed in Section \ref{sec:methodology} with |
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45 | event and data inputs |
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46 | discussed in Sections \ref{sec:tsunamiscenario} and \ref{sec:data} respectively. |
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47 | The inundation results are presented and discussed in Section \ref{sec:results} |
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48 | and the impact modelling results outlined in Section \ref{sec:impact}. |
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49 | A summary of the results detailing issues |
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50 | regarding underlying data and further model development, are discussed |
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51 | in Section \ref{sec:summary}. |
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52 | |
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