Changeset 3215


Ignore:
Timestamp:
Jun 23, 2006, 3:23:38 PM (18 years ago)
Author:
sexton
Message:

onslow updates - remove 1.5m and -1.5m AHD results from report

Location:
production/onslow_2006
Files:
28 added
5 edited

Legend:

Unmodified
Added
Removed

  • production/onslow_2006/make_report.py

    r3210 r3215  
    7070report_title = 'Tsunami impact modelling for the North West shelf: %s' %scenario_name.title()
    7171
    72 production_dirs = {'20060426_004129': '1.5 AHD',
    73                    '20060426_004237': '-1.5 AHD',
    74                    '20060515_001733': '0 AHD'}
     72#production_dirs = {'20060426_004129': '1.5 AHD',
     73#                   '20060426_004237': '-1.5 AHD',
     74#                   '20060515_001733': '0 AHD'}
     75
     76production_dirs = {'20060515_001733': '0 AHD'}
    7577
    7678max_maps = {'1.5 AHD': 'HAT_map',

  • production/onslow_2006/report/anuga.tex

    r3171 r3215  
    2828As part of the CRA, it was decided to provide results for the
    2929extremes of the tidal regimes to understand the potential range of impacts
    30 from the
    31 event. However, throughout the modelling process, a number of issues became
    32 evident. A standard assumption is that zero Australian Height Datum
    33 (AHD) is approximately
    34 the same as Mean Sea Level (MSL). Implementing the values provided for
    35 Highest Astronomical Tide (HAT) and Lowest Astronomical Tide (LAT)
    36 would inundate some regions of Onslow before the simulation is even begun.
    37 Further, the recorded value for HAT will not be identical at each
    38 point along the coastline. There
    39 is evidence suggesting different high tide marks (with respect
    40 to a set datum) within
    41 a localised region. As an aside, a current GA contract is
     30from the event. Onslow is termed a Standard Port
     31by the Australian Hydrographic Service, with tidal
     32predictions based on continuous observation of the tide
     33over a period of at least one year, however it is advised that these
     34observations extend to three years to note changes in the mean
     35sea level. The Australian National Tide Tables 2006 \cite{antt:06}
     36describes how
     37these predictions are rounded to two decimal places, then
     38further rounded to a single decimal place.
     39Figure \ref{fig:ic} shows the contour lines for
     40the values for
     41Highest Astronomical Tide (HAT; 1.5m AHD), Mean Sea Level (MSL; 0m AHD)
     42and Lowest Astronomical Tide (LAT; -1.5m AHD) for Onslow, \cite{antt:06}.
     43It is evident from this figure that significant areas of Onslow are
     44inundated before the simulation is even begun indicating
     45shortcomings with the underlying data set. Therefore, we use only
     46one initial condition for this scenario; 0m AHD.
     47%It is important to note that there is no Bureau of Metereoolgy
     48%tide gauge in Onslow,
     49As an aside, a current GA contract is
    4250extracting information from LANDSAT imagery to reconstruct the
    4351tidal variations for various WA locations. Future modelling of
    … …  
    4654tidal effects (that is, the changes in water height over time for
    4755the entire study area) is not currently modelled.
    48 In the simulations provided in this report, we assume that
    49 increase of water height for the initial condition is spatially consistent
    50 for the study region.
    51 
    52 We use three initial conditions in this report;
    53 -1.5m AHD, 0m AHD and 1.5m AHD. Figure \ref{fig:ic} shows the Onslow region
    54 with the 1.5m AHD and -1.5m AHD contour lines shown. It is evident then
    55 that much of Onslow would be inundated at a uniform tide at 1.5m AHD.
     56%In the simulations provided in this report, we assume that
     57%increase of water height for the initial condition is spatially consistent
     58%for the study region.
    5659Bottom friction will generally provide resistance to the water flow
    5760and thus reduce the impact somewhat. However, it is an open area
    … …  
    6669{../report_figures/contours.jpg}}
    6770
    68   \caption{Onslow regions showing the 1.5m AHD and -1.5m AHD contour lines.}
     71  \caption{Onslow regions showing the 1.5m AHD, 0m AHD and -1.5m AHD contour lines.}
    6972  \label{fig:ic}
    7073\end{figure}
    71 
    72 
    73 
    74 

  • production/onslow_2006/report/interpretation.tex

    r3171 r3215  
    4343(3.8 hours) after the tsunami is generated.
    4444Prior to the drawdown, maximum amplitudes are approximately 50cm at
    45 West of Groyne and the mouth of Beadon Creek, for example. The first wave
     45West of Groyne (Figure \ref{fig:gaugeWestofGroyne}) and the mouth of Beadon Creek
     46(Figure \ref{fig:gaugeBeadonCreekmouth}), for example. The first wave
    4647after the drawdown ranges from approximatly 2m in the
    47 west of Beadon Bay to 1.5m in the east of Beadon Bay. The speed
     48west of Beadon Bay (Figure \ref{fig:gaugeBeadonBaywest})
     49to 1.5m in the east of Beadon Bay (Figure \ref{fig:gaugeBeadonBayeast}).
     50The speed
    4851sharply increases at drawdown with further increases as the
    4952wave grows in amplitude.
    … …  
    5659
    5760The maximum speed found for the offshore locations occur at the West of
    58 Groyne location with speeds halved at the Beadon Bay west location.
    59 The Beadon Bay west speed is greater that the east of Beadon
    60 Bay location. There is similar differences in amplitude (from drawdown to maximum
     61Groyne location (Figure \ref{fig:gaugeWestofGroyne})
     62with speeds halved at the Beadon Bay west location.
     63The Beadon Bay west speed is greater than the east of Beadon
     64Bay location (Figure \ref{fig:gaugeBeadonBayeast}).
     65There is similar differences in amplitude (from drawdown to maximum
    6166amplitude), however, the western location is in deeper water than the eastern
    6267location which may indicate the increased speed found in the east of the
    63 bay. 
    64 
    65 Subsequent drawdowns are seen as the multitude of waves which make up the
    66 event propagate towards the shore.
     68bay.  Subsequent drawdowns are seen as the multitude of waves which make up the
     69event (see Figure \ref{fig:MOSTsolution}) propagate towards the shore.
    6770
    6871%At some gauge locations, these
    … …  
    7174%West of Groyne and Beadon Creek locations.
    7275
    73 It is evident for each simulation that the sand dunes west of
    74 Onslow are very effective in halting the tsunami wave,
    75 see Figures \ref{fig:MSL_max_inundation} and
    76 \ref{fig:LAT_max_inundation} and  \ref{fig:HAT_max_inundation}.
    77 The height of these
    78 sand dunes are approximately 10m which is more than enough to halt
    79 the largest of the tsunami waves which occurs for the
    80 1.5m AHD simulation. There is inundation between the sand dunes at high
    81 tide, Figure \ref{fig:HAT_max_inundation}, however, this water
    82 penetrated from the north east (via
    83 Onslow town centre) rather than seaward.
     76It is evident that the sand dunes west of
     77Onslow are very effective in halting the tsunami wave which rise to approximately
     7810m in height,
     79see Figure \ref{fig:MSL_max_inundation}.
     80%There is inundation between the sand dunes at high
     81%tide, Figure \ref{fig:HAT_max_inundation}, however, this water
     82%penetrated from the north east (via
     83%Onslow town centre) rather than seaward.
    8484The same feature is evident for the sand dunes east of Onslow which
    8585rise to 15m in height. Currently, we do not model changes
    … …  
    8787Therefore, we do not know whether these sand dunes would withstand the
    8888transmitted energy of the tsunami wave.
     89The tsunami wave penetrates the river east of Onslow with wave height
     90approximately 2m at the mouth (Figure \ref{fig:gaugeBeadonCreekmouth})
     91and inundation
     92exceeding 1m found at the Beadon Creek south of dock location (Figure
     93\ref{fig:gaugeBeadonCreeksouthofdock}).
     94%The wave penetrates the river east of Onslow with increasingly
     95%greater inundation between the -1.5m AHD and 1.5m AHD simulations.
    8996
    90 The wave penetrates the river east of Onslow with increasingly
    91 greater inundation between the -1.5m AHD and 1.5m AHD simulations.
     97%As expected, there is greater inundation at 1.5m AHD. The major road
     98%into Onslow, the Onslow Mount Stuart Rd, remains free of inundation for
     99%all simulations. Beadon Creek Rd which services the wharf in the
     100%river becomes increasingly inundated as the initial condition
     101%changes from 0m AHD to 1.5m AHD. Only the
     102%entry to the wharf on Beadon Creek Rd is sufficiently inundated at -1.5m AHD
     103%to stop traffic. At 1.5m AHD however, essentially the entire road
     104%would be impassable.
    92105
    93 As expected, there is greater inundation at 1.5m AHD. The major road
    94 into Onslow, the Onslow Mount Stuart Rd, remains free of inundation for
    95 all simulations. Beadon Creek Rd which services the wharf in the
    96 river becomes increasingly inundated as the initial condition
    97 changes from 0m AHD to 1.5m AHD. Only the
    98 entry to the wharf on Beadon Creek Rd is sufficiently inundated at -1.5m AHD
    99 to stop traffic. At 1.5m AHD however, essentially the entire road
    100 would be impassable.
    101 
    102 There is significant inundation of at
    103 least 2m on the foreshore of Onslow for 0m AHD and 1.5m AHD.
    104 The inundation extent increases the initial condition increases above 0m AHD,
    105 pushing the edges
    106 of the majority of the road infrastructure in the Onslow town centre.
     106%There is significant inundation of at
     107%least 2m on the foreshore of Onslow for 0m AHD and 1.5m AHD.
     108%The inundation extent increases the initial condition increases above 0m AHD,
     109%pushing the edges
     110%of the majority of the road infrastructure in the Onslow town centre.
     111There is significant inundation of at least 2m on the foreshore of Onslow.
     112The major orad into Onslow, the Onslow Mount Stuart Rd, remains free
     113of inundation, however there is some inundation on Beadon Creek Rd
     114which services the wharf in the river.

  • production/onslow_2006/report/onslow_2006_report.tex

    r3211 r3215  
    4040%\author{Geoscience Australia}
    4141
    42 
    43 
    4442\begin{document}
    4543  \maketitle
     44
     45\begin{figure}[hbt]
     46  \centerline{ \includegraphics[scale=0.25]{../report_figures/GAlogo.jpg}}
     47\end{figure}
    4648   
    47 \begin{figure}[hbt]
    48   \centerline{ \includegraphics[scale=0.45]{../report_figures/GAlogo.jpg}}
    49 \end{figure}
    50 
    5149  \tableofcontents
    5250
    … …  
    111109 \clearpage
    112110 
    113 \input{LAT_map}
    114  \clearpage
    115  
    116 \input{HAT_map}
    117  \clearpage
    118  
    119111
    120112   \section{Impact modelling}
    … …  
    130122     \label{sec:metadata}
    131123     \input{metadata}
     124
    132125   \section{Time series}
    133126     \label{sec:timeseries}
    … …  
    136129     \label{sec:damageinputs}
    137130     \input{damage_inputs}
    138 \input{latexoutput}
     131\input{latexoutput20060515001733}
    139132 \clearpage
    140133 

  • production/onslow_2006/report/references.tex

    r3201 r3215  
    2121URL: http://www.mssanz.org.au/modsim05/papers/nielsen.pdf
    2222
     23\bibitem{antt:06} Australian National Tide Tables 2006:
     24Australia, Papua New Guinea, Solomon Islands and Antarctica and East Timor.
     25Australian Hydrographic Publication 11, Australian Hydrographic Service.
     26
    2327\bibitem{papathoma:vulnerability}
    2428Papathoma, M. and Dominey-Howes, D. (2003)
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