Changeset 7220


Ignore:
Timestamp:
Jun 19, 2009, 3:12:18 AM (15 years ago)
Author:
jakeman
Message:

John Jakeman: Made minor changes to validation study and added .bst file necessary for Ocean Dynamics Journal format

Location:
anuga_work/publications/boxing_day_validation_2008
Files:
1 added
1 edited

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  • anuga_work/publications/boxing_day_validation_2008/patong_validation.tex

    r7219 r7220  
    663663\end{figure}
    664664
    665 
    666665\subsection{Propagation}\label{sec:resultsPropagation}
    667666The deformation results described in Section~\ref{sec:modelGeneration}
     
    680679Figure \ref{fig:jasonComparison} provides a comparison of the
    681680\textsc{ursga} predicted sea surface elevation with the JASON
    682 satellite altimetry data. The \textsc{ursga} model replicates the
    683 amplitude and timing of the first peak and trough well. However, the
    684 model does not resolve the double peak of the first wave. Also note
     681satellite altimetry data. The \textsc{ursga} model replicates the
     682amplitude and timing of the the wave observed at 2.5 degrees South,
     683but underestimates the amplitude of the wave further to the south at
     6844 degrees South. In the model, the southern most of these two waves
     685appears only as a small bump in the cross section of the model shown
     686in Figure~\ref{fig:jasonComparison} instead of being a distinct peak
     687as can be seen in the satellite data. Also note
    685688that the \textsc{ursga} model prediction of the ocean surface
    686689elevation becomes out of phase with the JASON data at 3 to 7 degrees
     
    755758reasonable
    756759
    757 FIXME (Ole): Perhaps rephrase a bit as the 1cm vs 10cm is hard to
    758 understand.  Maximum onshore inundation elevation was computed from
    759 the model throughout the entire Patong Bay
     760%FIXME (Ole): Perhaps rephrase a bit as the 1cm vs 10cm is hard to
     761%understand.  Remove figure using 1cm inundation
     762Maximum onshore inundation elevation was computed from the model throughout the entire Patong Bay
    760763region. Figure~\ref{fig:inundationcomparison1cm} shows very good
    761 agreement between the measured and simulated inundation. The
    762 \textsc{anuga} simulation determines a region to be inundated if at
    763 some point in time it was covered by at least 1cm of water. This
    764 precision in field measurements is impossible to obtain. The
    765 inundation boundary is determined by observing water marks and other
    766 signs left by the receding waters. The precision of the observed
    767 inundation map is, most likely, at least an order of magnitude worse
    768 than the \textsc{anuga} simulation. The simulated inundation based
    769 upon a 10cm threshold is shown in
    770 Figure~\ref{fig:inundationcomparison1cm}. An inundation threshold of
    771 10cm was selected for all future simulations to reflect the likely
     764agreement between the measured and simulated inundation.  However these results are dependent on
     765the classification used to determine whether a region in in the numerical simulation was inundated.
     766In Figure~\ref{fig:inundationcomparison1cm} a point in the computational domain was deemed
     767inundated if at some point in time it was covered by at least 1cm of water.
     768However the precision of the field measurements is most likely different to the 1cm used
     769to determine the simulated inundation. The inundation boundary generated by the on-site survey
     770was determined by observing water marks and other signs left by the receding waters. Consequently
     771the measurement error along the inundation boundary of the survey varies significantly. However it is
     772impossible to quantify this error. Figure~\ref{fig:inundationcomparison1cm} shows the simulated
     773inundation using a threshold of 10cm. An inundation threshold of 10cm was selected for
     774the current and all future simulations to reflect the likely
    772775accuracy of the survey and subsequently facilitate a more appropriate
    773 comparison between the modelled and observed inundation area.
     776comparison between the modelled and observed inundation area. 
    774777
    775778An animation of this simulation is available on the ANUGA website at \url{https://datamining.anu.edu.au/anuga} or directly from \url{http://tinyurl.com/patong2004}.
     
    789792introduce the measure
    790793\begin{equation}
    791 A(I_{in})=\frac{A(I_m\cap I_o)}{A(I_o)}
     794\rho_{in}=\frac{A(I_m\cap I_o)}{A(I_o)}
    792795\end{equation}
    793 representing the ratio $A(I_{in})$ of observed
     796representing the ratio $\rho_{in}$ of observed
    794797inundation region $I_o$ captured by the model $I_m$. Another useful
    795798measure is the fraction of the modelled inundation area that falls
    796799outside the observed inundation area given by the formula
    797800\begin{equation}
    798 A(I_{out})=\frac{A(I_m\setminus (I_m\cap I_o))}{A(I_o)}
     801\rho_{out}=\frac{A(I_m\setminus (I_m\cap I_o))}{A(I_o)}
    799802\end{equation}
    800803These values for the two aforementioned simulations are given in
    801 Table~\ref{table:inundationAreas} FIXME (Ole): The left hand side of
    802 these equations are not areas - consider another symbol.
     804Table~\ref{table:inundationAreas} %FIXME (Ole): The left hand side of
     805%these equations are not areas - consider another symbol.
    803806
    804807Discrepancies between the survey data and the modelled inundated
     
    942945\begin{center}
    943946\label{table:inundationAreas}
    944 \caption{$A(I_{in})$ and $A(I_{out})$ of the reference simulation and all sensitivity studies}
     947\caption{$\rho_{in}$ and $\rho_{out}$ of the reference simulation and all sensitivity studies}
    945948\begin{tabular}{|c|c|c|}
    946949\hline
    947  & $A(I_{in})$ & $A(I_{out})$ \\
     950 & $\rho_{in}$ & $\rho_{out}$ \\
    948951\hline\hline
    949952Reference & 0.76 & 0.22\\
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