For this project we were given a scenario that a potential tsunami that may hit Vancouver. Using the data they gave us, we were meant to map the areas that may potentially be damaged:
Scenario
You have been hired by the City of Vancouver GIS department. After geological events that have transpired recently around the world, your supervisor wants you to prepare a map that highlights the areas in the city that are more at risk from a tsunami. (Risk of tsunami in Vancouver is small due to Vancouver Island, however, there is still a risk, and the analysis in this lab could be applied to any coastal city in the world, or to sea level rise due to climate change). Although the height, speed and inland reach of a tsunami depend on many factors, we will simplify for this exercise that the immediate danger zone from a 10-metre wave is mainly to the low lying areas at, or below, 10 metres that lie up to 1 kilometre from the shoreline. The municipality is interested in the following information:
- total area threatened, listed by land use type;
- length of the roads that might be affected, broken down by road type; (highway, major road, local road, etc.);
- number of educational and health care facilities within the danger zone, if any;
- locations to put up tsunami warning signage
Here is the map I have produced: Potential Areas of Impact
Results
12.126% of City of Vancouver’s area is in danger. I found this through opening the attribution table of Vancouver Danger and got the sum of the area: 15889260.298512meters (1588.93hectares). Then, I opened the attribution table of VancouverMask and got the sum of the area which was 131033339.950334meters (13103.33 hectares). Dividing Vancouver danger zone from the overall Vancouver map and multiplying that number by 100 gave me the percentage.
ST ANTHONY OF PADUA, ECOLE ROSE DES VENTS, FALSE CREEK ELEMENTARY, EMILY CARR INSTITUTE OF ART & DESIGN (ECIAD), HENRY HUDSON ELEMENTARY would be under the danger zone.
To see this I:
- I clipped together Vancouver Danger and VancouverMask to identify the danger areas in Vancouver creating a new layer called Vancouver_Area_Danger
- Then clipped together Vancouver_Area_Danger with Vancouver Education in order to see what schools fell under the danger zone.
- When I tried to clip together Vancouver Health and Vancouver Area Danger, the attribution table did not show any data, implying there were no health facilities in the danger zone.