Changeset 2991

Timestamp:

May 27, 2006, 7:23:19 PM (19 years ago)

Author:

sexton

Message:

updates

Location:

production/onslow_2006

Files:

• make_report.py (modified) (1 diff)
• report/interpretation.tex (modified) (3 diffs)

production/onslow_2006/make_report.py

@@ -172 +172 @@
 
 # Generate latex output for gauges
-s = '\\begin{center} \n \\begin{tabular}{|l|l|l|}\hline \n \\bf{Gauge Name} & \\bf{Easting} & \\bf{Northing} \\\\ \hline \n'
-fid.write(s)
-
-gauges, locations = get_gauges_from_file(project.gauge_filename)
+s = '\\begin{center} \n \\begin{tabular}{|l|l|l|}\hline \n \\bf{Gauge 
+Name} & \\bf{Easting} & \\bf{Northing} \\\\ \hline \n' fid.write(s)
+#s = '\\begin{center} \n \\begin{tabular}{|l|l|l|l|}\hline \n \\bf{Gauge 
+#Name} & \\bf Easting} & \\bf Northing} & \\bf Elevation \\\\ \hline \n
+
+gauges, locations = 
+get_gauges_from_file(project.gauge_filename)
 
 for name, gauges in zip(locations, gauges):
     east = gauges[0]
     north = gauges[1]
-    s = '%s & %.2f & %.2f \\\\ \hline \n' %(name.replace('_',' '), east, north)
+    #elev = gauges[2]
+    s = '%s & %.2f & %.2f \\\\ \hline \n' %(name.replace('_',' '), east, 
+north)
+    #s = '%s & %.2f & %.2f & %.2f \\\\ \hline \n %(name.replace('_',' '), 
+east, north, elev)
     fid.write(s)
 

production/onslow_2006/report/interpretation.tex

@@ -1 +1 @@
 The following subsections detail the time series at select locations
-for high, low and zero tide conditions. These locations have
-been chosen to assist in describing the features of the tsunami wave
-and the resultant impact ashore. It is evident from \ref{fig:ic_high}
-that the DEM ...
+for Highest Astronomical Tide (HAT), Lowest Astronomical Tide (LAT) and 
+Mean Sea Level (MSL) conditions. These locations 
+have been chosen to assist in describing the features of the tsunami wave
+and the resultant impact ashore. Here, we assume that MSL coincides with 
+AHD zero. This is a standard assumption and confirmed with the WA DLI (check 
+where Ric is from). The graph ranges for both stage and 
+velocity are made consistent for each of comparison. In addition, velocities 
+under 0.001 m/s are not shown. As a useful benchmark, the following table 
+describes typical values of velocity and corresponding examples.
+
+\begin{center}
+\begin{tabular}{|c|c|}\hline
+Velocity (m/s) & Example \\ \hline
+1 & \\ \hline
+2 & \\ \hline
+5 & \\ \hline
+10 & \\ \hline
+\end{tabular}
+\end{center}
+
+It is evident from \ref{fig:ic_high} 
+that much of Onslow would be inundated at Highest Astronomical Tide (HAT) 
+(1.5m above MSL).
+HAT is the projected tide on a 19 year cycle, and Mean High Water Springs 
+(MHWS) is the tide which is projected to occur on a yearly cycle. The 
+Australian National Tidal Tables 2006 determines MHWS for Onslow to be 1m 
+(adjusted to AHD) which also places regions within the study area under 
+water before a tsunami wave reaches the shore. Using HAT or even 
+MHWS in this way has significant infrastructure inundated which does not 
+seem reasonable. Therefore, we show results for MSL only and 
+provide a 
+qualitative discussion on the changes to the inundation at HAT and LAT.  
+
+Hamish - does the Onslow coastline coincide with teh yellow bit on the 
+Onslow map? If so, does that place AHD 0 at MHWS? Regardless, this 
+doesn't help what would happen at Pt Hedland.
+
+Nick/DB - In comparing ANUGA to MOST etc, what's DB using? If looking OK, 
+that probably means that we're saying AHD 0 = MSL.
+
+ANUGA question - why would say Bindi Bindi which has an elevation of 
+around .8m start with 1.5m stage? Dam overflow gauge elevation around 
+2.4m and IC = 2.45m ... Light Tower gauge elevation around 1.m and IC 
+around 1.45m ... Could we add 1.5m to the boundary condition instead and 
+propagate the water from there? 
+
+The Australian Hydrographic Office fair sheet for Onslow describes the 
+chart datum to be LAT with MSL and HAT being 1.5 and 3 respectively. This 
+then places HAT and LAT at 1.5 AHD and -1.5 AHD respectively. Other 
+detail on the chart describes the blah de blah mark to be MHWS.
+ 
+Depending on what the following figures look like, we may need to use the 
+other data rather than the DTED.
 
 \begin{figure}[hbt]
@@ -29 +78 @@
 \end{figure}
 
+Examining the offshore gauges, the drawdown prior to the tsunami wave 
+arriving at the shore can be seen to occur around 14000 secs (convert to 
+mins) (x hours) after the tsunami wave penetrates the boundary (Nick - is 
+this right?). 
+Prior to the drawdown, maximum amplitudes are approximately 50cm at 
+West of Groyne and the mouth of Beadon Creek, for example. The first wave 
+after the drawdown ranges from approximatly 2m in the 
+west of Beadon Bay to 1.5m in the east of Beadon Bay. The velocity 
+sharply increases at drawdown with further increases as the 
+wave grows in amplitude. 
+There is an increased amplitude of approximately 3m found in 
+east of Beadon Bay for the secondary wave, as opposed to the first wave. 
+This feature is also evident at the West of Groyne location. 
+This may be due to the geography of the bay, including the groyne west of 
+the creek mouth opening, the local bathymetry
+and the direction of the tsunami wave. 
 
-What are the features of the tsunami wave?
-direction? multiple waves? amplitude offshore?
+The maximum velocity found for the offshore gauges occurs at the West of 
+Groyne location with velocities halved at the Beadon Bay west location. 
+The Beadon Bay west velocity is greater that the gauge in the east of Beadon 
+Bay. There is similar differences in amplitude (from drawdown to maximum 
+amplitude), however, the west gauge is in deeper water than the east 
+gauge which may indicate the increased velocity found in the east of the 
+bay.  
 
-It is evident for each simulation that the sand dunes west of Onslow
-are very effective in halting the tsunami wave. The height of these
+Subsequent drawdowns are seen as the multitude of waves which make up the 
+event propagate towards the shore. 
+
+???
+At some gauge locations, these 
+subsequent waves cause significantly increased inundation than that of 
+the first wave. This is particularly seen at the Beadon Creek Docks, 
+West of Groyne and Beadon Creek locations.
+???
+
+It is evident for each simulation that the sand dunes west of 
+Onslow are very effective in halting the tsunami wave. The height of these
 sand dunes are approximately 10m which is more than enough to halt
 the largest of the tsunami waves which occurs for the
@@ -58 +138 @@
 
 There is significant inundation of at
-least 2m on the foreshore of Onslow for zero and high tide.
+least 2m on the foreshore of Onslow for MSL and HAT.
 The inundation extent increases as the tide rises, pushing the edges
 of the majority of the road infrastructure in the Onslow town centre.