Changeset 7187


Ignore:
Timestamp:
Jun 12, 2009, 7:01:37 AM (13 years ago)
Author:
ole
Message:

Fixed up references, added citation and cleaned up

Location:
anuga_work/publications/boxing_day_validation_2008
Files:
2 edited

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  • anuga_work/publications/boxing_day_validation_2008/patong_validation.tex

    r7183 r7187  
    228228\end{figure}
    229229
    230 The domain was discretised into approximately 350,000 triangles. The resolution of the grid was increased in certain regions to efficiently increase the accuracy of the simulation. The grid resolution ranged between a maximum triangle area of $1\times 10^5$ m$^2$ near the Western ocean boundary to $3$ m$^2$ in the small regions surrounding the inundation region in Patong Bay. Due to a lack of available data, friction was set to a constant throughout the computational domain. For the reference simulation a Manning's coefficient of 0.01 was chosen based upon previous numerical experiments conducted by the authors (FIXME: Citation Tom Baldock?? Or Duncan??).
     230The domain was discretised into approximately 350,000 triangles. The resolution of the grid was increased in certain regions to efficiently increase the accuracy of the simulation. The grid resolution ranged between a maximum triangle area of $1\times 10^5$ m$^2$ near the Western ocean boundary to $3$ m$^2$ in the small regions surrounding the inundation region in Patong Bay. Due to a lack of available data, friction was set to a constant throughout the computational domain. For the reference simulation a Manning's coefficient of 0.01 was chosen to represent a small resistance to the water flow. See Section \ref{sec:friction sensitivity} for details on model sensitivity to this parameter.
     231
    231232
    232233The boundary condition at each side of the domain towards the south and the north where no data was available was chosen as a transmissive boundary condition effectively replicating the time dependent wave height present just inside the computational domain. Momentum was set to zero. Other choices include applying the mean tide value as a Dirichlet type boundary condition but experiments as well as the result of the verification reported here showed that this approach tends to under estimate the tsunami impact due to the tempering of the wave near the side boundaries.
     
    271272
    272273Figure \ref{fig:gauge_locations} shows four locations where time series have been extracted from the model. The two offshore timeseries are shown in Figure \ref{fig:offshore_timeseries} and
    273 the two onshore timeseries are shown in Figure \ref{fig:onshore_timeseres}. The latter coincide with locations where video footage from the event is available.
     274the two onshore timeseries are shown in Figure \ref{fig:onshore_timeseries}. The latter coincide with locations where video footage from the event is available.
    274275
    275276\begin{figure}[ht]
     
    286287\includegraphics[width=10.0cm,keepaspectratio=true]{gauge_bay_depth.jpg}
    287288\includegraphics[width=10.0cm,keepaspectratio=true]{gauge_bay_speed.jpg}
    288 \caption{Timeseries obtained from the two offshore locations shown in Figure \protect \ref{fig_gauge_locations}}
     289\caption{Timeseries obtained from the two offshore locations shown in Figure \protect \ref{fig:gauge_locations}}
     290\end{center}
    289291\label{fig:offshore_timeseries}
    290 \end{center}
    291292\end{figure}
    292293
     
    295296\includegraphics[width=10.0cm,keepaspectratio=true]{gauges_hotels_depths.jpg}
    296297\includegraphics[width=10.0cm,keepaspectratio=true]{gauges_hotels_speed.jpg}
    297 \caption{Timeseries obtained from the two onshore locations shown in Figure \protect \ref{fig_gauge_locations}}
     298\caption{Timeseries obtained from the two onshore locations shown in Figure \protect \ref{fig:gauge_locations}}
     299\end{center}
    298300\label{fig:onshore_timeseries}
    299 \end{center}
    300301\end{figure}
    301302
     
    333334%========================Friction==========================%
    334335\subsection{Friction}
    335 The first study investigated the impact of surface roughness on the predicted run-up. According to Schoellte~\cite{schoettle2007} appropriate values of Manning's coefficient range from 0.007 to 0.030 for tsunami propagation over a sandy sea floor.  Consequently we simulated the maximum onshore inundation using the a Manning's coefficient of 0.0003 and 0.03. The resulting run-up is shown in Figures
     336\label{sec:friction sensitivity}
     337The first study investigated the impact of surface roughness on the predicted run-up. According to Schoettle~\cite{schoettle2007} appropriate values of Manning's coefficient range from 0.007 to 0.030 for tsunami propagation over a sandy sea floor.  Consequently we simulated the maximum onshore inundation using the a Manning's coefficient of 0.0003 and 0.03. The resulting run-up is shown in Figures
    336338\ref{fig:sensitivity_friction} and  the maximum flow speeds\ref{fig:sensitivity_friction_speed}. These figurers show that the on-shoer inundation extent decreases with increasing friction and that small perturbations in the friction cause bounded changes in the output. This is consistent with the conclusions of Synolakis~\cite{synolakis05} who states that the long wavelength of tsunami tends to mean that the friction is less important in comparison to the motion of the wave.
    337339
  • anuga_work/publications/boxing_day_validation_2008/tsunami07.bib

    r7186 r7187  
    10981098pages = {1--5},
    10991099OPTdoi = {10.1029/2006GL026784},
    1100 
    1101 }
     1100}
     1101
    11021102@ARTICLE{szczucinski06,
    11031103AUTHOR = {Szczucinski, W. and Chaimanee, N. and Niedzielski, P. and
     
    11101110NUMBER ={5},
    11111111PAGES = {793--810}
     1112}
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