Changeset 6950
- Timestamp:
- May 5, 2009, 9:55:48 AM (16 years ago)
- Location:
- anuga_work/publications/boxing_day_validation_2008
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- 1 added
- 2 edited
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anuga_work/publications/boxing_day_validation_2008/patong_validation.tex
r6943 r6950 200 200 201 201 \subsection{Propagation} 202 The deformation results described in Section~\ref{ modelGeneration} was then used to provide an profile of the initial ocean surface displacement. This wave was used as an initial condition for \textsc{ursga} and was propagated the tsunami throughtout the Bay of Bengal. The rectangular computational domain of the largest grid extended from 90$^0$ to 100$^0$East and 0 to 15$^0$North and contained 1335$\times$1996 finite difference points. Inside this grid, a nested sequence of grids was used. The grid resolution of the nested grids went from 27 arc seconds in the coarsest grid, down to 9 arc seconds in the second grid, 3 arc seconds in the thrid grid and finally 1 arc second in the finest grid near Patong. The computational domain is shown in Figure\ref{gif:ursgaDomain}.202 The deformation results described in Section~\ref{sec:modelGeneration} was then used to provide an profile of the initial ocean surface displacement. This wave was used as an initial condition for \textsc{ursga} and was propagated the tsunami throughtout the Bay of Bengal. The rectangular computational domain of the largest grid extended from 90$^0$ to 100$^0$East and 0 to 15$^0$North and contained 1335$\times$1996 finite difference points. Inside this grid, a nested sequence of grids was used. The grid resolution of the nested grids went from 27 arc seconds in the coarsest grid, down to 9 arc seconds in the second grid, 3 arc seconds in the thrid grid and finally 1 arc second in the finest grid near Patong. The computational domain is shown in Figure\ref{fig:computational_domain}. 203 203 204 204 Figure \ref{fig:jasonComparison} provides a comparison of the \textsc{ursga} predicted surface elevation with the JASON satellite altimetry data. The \textsc{ursga} model replicates the amplitude and timing of the first peak and trough well. However the model does not resolve the double peak of the first wave. Also note that the \textsc{ursga} model prediction of the ocean surface elevation becomes out of phase with the JASON data at 3 to 7 degrees latitude. Chlieh et al~\cite{chlieh07} also observe these misfits and suggest it is caused by a reflected wave from the Aceh Peninsula that is not resolved in the model due to insufficient resolution of the computational mesh and bathymetry data. This is also a limitation of the model presented here, but probably could be improved by nesting grids near Aceh. … … 218 218 \begin{center} 219 219 %\includegraphics[width=5.0cm,keepaspectratio=true]{extent_of_ursga_model.jpg} 220 \includegraphics[width=5.0cm,keepaspectratio=true]{ursgaDomain.jpg} 220 221 \includegraphics[width=5.0cm,keepaspectratio=true]{extent_of_ANUGA_model.jpg} 221 \includegraphics[width=5.0cm,keepaspectratio=true]{extent_of_ANUGA_model.jpg} 222 \caption{Computational domain of the ursga simulation (left) and the \textsc{anuga} simulation (rights). FIXME: Add lat longs to anuga and make fig for ursga} 222 \caption{Computational domain of the ursga simulation (left) and the \textsc{anuga} simulation (rights). FIXME: Add lat longs to anuga and make fig for ursga. Show where ANUGA domain fits in ursgaDomain} 223 223 \label{fig:computational_domain} 224 224 \end{center} … … 232 232 Both the URS model and the \textsc{anuga} inundation model shows that the event comprises a train of waves some with preceding drawdown effects (ADD details of waveform with a graph from URL and a gauge from \textsc{anuga} and discuss). 233 233 234 Maximum onshore inundation elevation was simulated throughout the entire Patong Bay region. Figure~\ref{fig:inundationcomparison1cm} shows very good agreement between the measured and simulated inundation. The \textsc{anuga} simulation determines a region to be inundated if at some point in time it was covered by at least 1cm of water. This precision in field measurements is impossible to obtain. The inundation boundary is determined by observing water marks and other signs left by the receding waters. The precision of the observed inundation map is, most likely, at least an order of magnitude worse than the \textsc{anuga} simulation. The simulated inundation based upon a 10cm threshold is shown in Figure~\ref{fig:inundationcomparison1 0cm}. An inundation threshold of 10cm was selected for all future simulations to reflect the likely accuracy of the survey and subsequently facilitate a more appropriate comparison between the modelled and observed inundation area.234 Maximum onshore inundation elevation was simulated throughout the entire Patong Bay region. Figure~\ref{fig:inundationcomparison1cm} shows very good agreement between the measured and simulated inundation. The \textsc{anuga} simulation determines a region to be inundated if at some point in time it was covered by at least 1cm of water. This precision in field measurements is impossible to obtain. The inundation boundary is determined by observing water marks and other signs left by the receding waters. The precision of the observed inundation map is, most likely, at least an order of magnitude worse than the \textsc{anuga} simulation. The simulated inundation based upon a 10cm threshold is shown in Figure~\ref{fig:inundationcomparison1cm}. An inundation threshold of 10cm was selected for all future simulations to reflect the likely accuracy of the survey and subsequently facilitate a more appropriate comparison between the modelled and observed inundation area. 235 235 236 236 \begin{figure}[ht] -
anuga_work/publications/boxing_day_validation_2008/tsunami07.bib
r6917 r6950 838 838 } 839 839 840 @Article{am non05,840 @Article{ammon05, 841 841 author = {C.J., Ammon and C. Ji and H. Thio and D. Robinson and Sidao Ni and V. Hjorleifsdottir and H. and T. Lay and S. Das and D. Helmberger and G. Ichinose and J. Polet and D. Wald}, 842 842 title = {Rupture Process of the 2004 Sumatra-Andaman Earthquake}, … … 1041 1041 pages = "37-38", 1042 1042 year = 2005,} 1043 1044 @Article{burbidge08, 1045 author = {Burbidge, D. and Cummins, P.R. and Mleczko, R. and Thio, H.K.}, 1046 title = {A Probabilistic Tsunami Hazard Assessment for Western Australia}, 1047 journal = {Pure appl. geophys.}, 1048 year = {2008}, 1049 volume = {165}, 1050 pages = {2059--2088}, 1051 doi = {10.1007/s00024-008-0421-x}, 1052 } 1053 1054 @Article{thio08, 1055 author = {Thio, H.K. and Somerville, P. and Inchinose, G.}, 1056 title = {Probabilistic analysis of tsunami hazards in southeast Asia}, 1057 journal = {J. Earthquakes and Tsunami}, 1058 year = {2008}, 1059 volume = {1}, 1060 pages = {119--137}, 1061 } 1062 1063 @Article{wessel98, 1064 author = {Wessel, P. and Smith, W.H.F.}, 1065 title = {New, improved version of Generic Mapping Tools released}, 1066 journal = {EOS trans. AGU}, 1067 year = {1998}, 1068 OPTvolume = {79}, 1069 OPTpages = {579}, 1070 } 1071 1072 @Article{wang03, 1073 author = {Wang, R. and Martin, F. L. and Roth, F.}, 1074 title = {Computation of deformation induced by earthquakes in a multi-layered crust â FORTRAN programs EDGRN EDCMP}, 1075 journal = {Comp. and Geosc.}, 1076 year = {2006}, 1077 OPTvolume = {2003}, 1078 OPTpages = {195--207}, 1079 } 1080 1081 @Article{stein07, 1082 author = {Stein, S. and Okal, E.A.}, 1083 title = {Ultralong Period Seismic Study of the December 2004 Indian Ocean Earthquake and Implications for Regional Tectonics and the Subduction Process}, 1084 journal = {Bulletin of the Seismological Society of America}, 1085 year = {2007}, 1086 volume = {97}, 1087 number = {1A}, 1088 pages = {S279âS295}, 1089 OPTdoi = {10.1785/0120050617.}, 1090 } 1091
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