source: anuga_work/production/sydney_2006/report/interpretation.tex @ 6842

The modelling has considered three separate regions based on the location
of the historical and potential slide failures. The regions A, B and C refer
to Wollongong, Sydney and Newcastle. Figure \ref{fig:overallmodel} shows
each model with respect to each other and highlights the location
of the slides modelled in this study. See Appendix \ref{sec:anugasetup}
for the detailed inundation modelling setup for each study region.

\begin{figure}[p]
\centering
\begin{tabular}{cc}
\includegraphics[scale=0.4]{../report_figures/overallmodelv3.jpg} &
\includegraphics[scale=0.4]{../report_figures/detailedmodel.jpg} \\
(a) & (b) \\
\end{tabular}
\caption{(a) NSW region showing the location of study regions A, B and C and the location
of the origins of the historical and potential slides. (b) Region C0 developed to allow 
modelling of the potential slide area withine region C.}
\label{fig:overallmodel}
\end{figure}

The purpose of this section is show the maximum inundation map for each
slide scenario for region A, B and C. The Bulli and Shovel slide occurring
in region A and the Birubi and Yacaaba slide in region C are considered to have occurred.
The potential slides are based on the volumes of these slides located in 
appropriate locations in the other regions.
The outputs in region B and C0 should thus be interpretted as potential tsunami inundation
for slides of varied volume. 
The modelling effectively describes the output as a function of slide
volume with Bulli the largest. This event may be used in paleo-tsunami 
investigations due to occur in early 2007. 

The time to impact after the initiation of the slide is approximately 25 mins 
for region A and B and approximately 35 mins for region C. See Appendix \ref{sec:timeseries}
for time series outputs at Fairy Meadow (for region A), Manly Beach (for region B) and 
Stockton Beach (for region C).

\begin{table}
\begin{center}

\caption{Parameters used in ANUGA for the the submarine mass failure scenarios.}
\begin{tabular}{|l|l|l|l|l|}\hline
{\bf Parameter} & {\bf Bulli} & {\bf Shovel} & {\bf Yacaaba } & {\bf Birubi }\\ \hline
Length (m) & 16840  & 13500  & 4189  & 9903 \\ \hline
Width (m) & 8860   & 4350  & 2898  & 4150 \\ \hline
Thickness (m) & 424  & 165  & 53 & 140 \\ \hline
Density g m$^{-3}$ & 1.46  & 1.49  & 1.48 & 1.48 \\ \hline
Water depth to centre of mass (m) & 1470  & 877  & 938 & 1320 \\ \hline
Bathymetric slope (\degree) & 4  & 4  & 2.3 & 3.7\\ \hline
Angular orientation (\degree) & 126 & 118  & 133 & 133 \\ \hline
\end{tabular}

\end{center}
\end{table}

Figures \ref{fig:bulliA}, \ref{fig:bulliB}, \ref{fig:bulliC0}, \ref{fig:bulliC} and \ref{fig:bulliC2}
describe the inundation extent to regions A, B, C0, C (near historical Birubi) and C
(near historical Yacaaba) respectively
for the Bulli volume, noting that \ref{fig:bulliA} is the historical event.
Similarly, Figures \ref{fig:shovelA}, \ref{fig:shovelB}, \ref{fig:shovelC0}, \ref{fig:shovelC}
and \ref{fig:shovelC2} describe the inundation extent for the Shovel
volume, noting that \ref{fig:shovelA} is the historical event. 
Figures \ref{fig:yacaabaA}, \ref{fig:yacaabaB}, \ref{fig:yacaabaC0}, \ref{fig:yacaabaC} and 
\ref{fig:yacaabaC2} describe the inundation extent for the Yacaaba volume, noting
that \ref{fig:yacaabaC2} is the historical event.
Figures \ref{fig:birubiA}, \ref{fig:birubiB}, \ref{fig:birubiC0}, \ref{fig:birubiC} and 
\ref{fig:birubiC2} describe the inundation extent for the Birubi volume, noting
that \ref{fig:birubiC} is the historical event.
It appears that the inundation extent grows with the volume of the slide. This may
be explained through Figure \ref{fig:depthvsamp} where the 
characteristic three dimensional 
amplitude is shown as a function of depth for each
slide volume (see Appendix \ref{sec:smfmodel} for details). The depth
for each specific slide is marked on the curve corresponding to its volume. From this we
can see that the initial amplitude is greatest for the Bulli slide, followed by the Shovel and Birubi
slides.


\begin{figure}[p]
%\centerline{\includegraphics[scale=0.25]{../report_figures/depthvsampdataslide.png}}
\caption{Relationship between characteristic 3D amplitude and depth
for each slide volume.}
\label{fig:depthvsamp}
\end{figure}