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1 | This report has described the impact to Onslow from a tsunami |
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2 | generated by a Mw 9 earthquake on the Sunda Arc subduction zone |
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3 | occurring at Highest Astronomical Tide, Lowest Astronomical Tide |
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4 | and Mean Sea Level. |
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5 | There is no knowledge of the return period for this event. The |
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6 | modelling methodology, assumptions and data sources for the Onslow |
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7 | scenario have also been described. |
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8 | As discussed in Section \ref{sec:issues}, it is imperative |
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9 | that the best available data is used to increase confidence |
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10 | in the inundation maps. An onshore grid resolution of the order |
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11 | of tens of metres is required, however, it is more important that the data |
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12 | is accurate (or at least well known). |
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13 | These scenarios will be revisited once the probabilistic models |
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14 | are complete so that a suite of tsunami impact assessments can be made. |
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15 | |
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16 | Future activities to support the impact studies on the North West Shelf |
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17 | include: |
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18 | |
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19 | \begin{itemize} |
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20 | \item Sourcing of data sets, |
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21 | \item Investigation of solution sensitivity to cell resolution, |
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22 | bathymetry and tsunami source uncertainties, |
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23 | \item Location of boundary for simulation study area, and |
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24 | \item Investigation of friction coefficients. |
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25 | \end{itemize} |
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