This map represents the census tracts falling into the 3 run up zones. The symbology goes from blue indicating lo density to red high density. Calculations were then made to evaluate how many poeple this represents. 1,064,340 people are at risk of inundation, while 717,378 people are at severe risk of inundation. However, it has to be considered that some census tracts are cut as they are not fully falling inside the risk zones. Therefore a 25% was taken away from those numbers to evaluate a more plausible evaluation of people at risk which resulted in 538,034.
RESULTS
The Run Up Analysis displayed the three allocated zones of severe, high and elevated ranging from 0 to 10meters varying from red to yello colours. Red being the areas most likely to get inundated.
It can be seen that most of Richmond and Delta are very vulnerable to tsunamis and are the areas that should be focused on for mitigation practices and development of preparatory facilities.
Although we also see that most of the coastal areas around the Fraser river are at risk, those could be discounted due to their non proximity to the sea.
The No risk zone indicates all areas falling above 10 meters elevation and thus not being counted in the worst case scenario of a tsunami occurence in Greater Vancouver.
This map displays the least cost path created between each schools in the severe area of the run up analysis to its associated refuge facility. All 12 paths were given a different color in order to better associate and visualize each. For example, the red path displays the red school Tomekichi Homma Elementary linked to the refuge Columbus Residence. All paths try to stick as much as possible to the lighter grey areas, which have a much lower costs than dark grey areas.
This last map, represents the multi criterion evaluation, layered together with the schools at severe risk denoted in the run up analysis. This map displays a symbology going from purple representing the worst areas to be in in the event of a tsunami and thus areas to be taken into consideration as officials develop strategies and facilities to mitigate the effects of tsunami on the demographics. The green areas represent on the other hand the lcoations which are most favorable and thus least at risk during a tsunami. These could be thought to be the best destination for families wanting to move to Greater Vancouver, or those already living in the area but wishing for a safer neighborhood.
The reason for the layering of the severe risk schools was to evaluate whether the run up analysis and the MCE found similar results in their analysis and thus each evaluation's validity. And in fact, the schools found to be most at risk in the run up analysis are also mainly located in the worst zone predicted by the MCE.
However, it can be seen here that the MCE evaluation has the density criteria very much at heart, and therefore areas such as Delta are not properly displayed. In fact, because the population density of Delta was very low as shown in the density population map, the MCE analysis found Delta to be mostly good locations. The same goes for the Sea Island in which one of the schools at severe risk falls into.
Although we see that the map is very highly weighted for density, we have seen in the sensibility analysis map shown in the methodology section, that equal weights have very similar results.
This map displays the elevation in Greater Vancouver that was displayed using a hillshade tool. This map is meant to underline the uppermost importance of Dela and Richmond areas as having the very least elevations, lower than Vancouver, which is why this study chose to look at Greater Vancouver's entirety rather than just the main city.
The run up analysis was then intersected with different layers in order to get a clear idea of who and what is at risk. The resulting map shows the schools as red, orange or yellow points according to which inundation zone they fall into, while the shelters are displayed as red, orange and yellow cross similarly representing with land area they fall into. The map thus shows once again the importance of focusing on Delta and Richmond as all of the severe risk schools and shelters are located in those two cities.
This map represents the factors cost that was used in order to evaluate the least cost path map which is shown below. This map therefore having evaluated all categories cited in the methodology part, shows a symbology going from light grey representing a low cost to travel through to dark grey, which on the other hand is considered to be dangerously inundated and thus very hardly accessible. Again, the cities of Richmond and Delta are shown to be the most at risk areas.