Changeset 3290

Timestamp:

Jul 7, 2006, 3:33:16 PM (18 years ago)

Author:

sexton

Message:

minor updates

File:

• production/onslow_2006/report/computational_setup.tex (modified) (2 diffs)

production/onslow_2006/report/computational_setup.tex

@@ -12 +12 @@
 coastline and extends offshore to the 100m contour line and inshore to 
 approximately 10m elevation.
-
-{\bf Need some words here about why pick 100m.}
 Preliminary investigations indicate that MOST and ANUGA compare
-well at the 100m contour line.
+well at the 100m contour line. In addition, the resolution for
+the MOST modelling indicate that it can theoretically model 
+tsunamis with a wavelength of 20-30km, and the wavelength of
+the tsunami wave at the boundary is approximately 20km. A much
+higher model resolution will be used in developing the probabilistic
+models for further studies.
 
 \begin{figure}[hbt]
@@ -42 +45 @@
 In addition, the data is not necessarily complete, as can be
 seen in Figure \ref{fig:onslow_area}.
-
-In the deep water modelling such as MOST,
-the minimum model resolution is chosen so that there at
-least ten cells per wavelength. In developing the 
-preliminary hazard map for the Western Australia coastline,
-\cite{BC:FESA}, a grid resolution of blah was used
-which can adequately model tsunamis with a wavelength of 
-50km. For this scenario, the wavelength of the tsunami wave is
-approximately 1km near the boundary indicating that a minimum
-grid resolution of 100m would be required.
-With this information, the remaining cell areas are
+The remaining cell areas are
 2500 m$^2$ for the region surrounding the coast,
 20000 m$^2$ for the region reaching approximately the 50m contour line, with
 the remainder of the study area having a cell area of 100000 m$^2$.
-These choice of cell areas is more than adequate to propagate the tsunami wave
+These choice of cell areas are more than adequate to propagate the tsunami wave
 in the deepest sections of the study area.\footnote{
-With a wavelength of 1km, the minimum (square) grid resolution would
-be 100m which results in a square cell area of 10000 m$^2$. A minimum
-triangular cell area would therefore be 5000 m$^2$.}
+With a wavelength of 20km, the minimum (square) grid resolution would
+be around 2000m (allowing ten cells per wavelength). 
+This results in a square cell area of 4000000 m$^2$ which indicates a minimum
+triangular cell area of 2000000 m$^2$.}
 The resultant computational mesh is shown in Figure \ref{fig:mesh_onslow}.