Learning GIS: Identifying Vancouver’s Tsunami Risk Areas

In this assignment, I have been tasked to prepare a map of the City of Vancouver's tsunami risk areas on the premise that sea level change and extreme weather due to climate change may affect our coastal city. I prepare a ArcGIS map of the affected neighbourhoods and land use types

(Click to enlarge image)

Hello All!

As the most immediate danger zone of a 15-metre wave will affect land at the elevation of or under 15 metres that is 1 kilometre from the shoreline, I have highlighted the neighbourhoods and land use types that will be affected.

Through my analysis, I have found that 15.5% of the City of Vancouver’s area is in in danger in a tsunami.
I came to this conclusion through:

  1. Reclassifying the areas below 15 metre elevation
  2. Performing buffer analysis of areas 1 kilometre from the shore
  3. Using the intersect tool to combine the two factors into one polygon to summarize the total area at tsunami risk.

I have also identified some of the health and educational facilities within this tsunami risk zone using the previous polygon of tsunami risk and the clip tool to isolate healthcare and education points.

Healthcare: False Creek Residence, Broadway Pentecostal Lodge, Coast West Community Home, Yaletown House Society, Villa Cathay Care Home.

Education facilities in danger zones include: St. Anthony of Padua, Ecole Rose des Vents, Heritage 3R’s School, Vancouver Montessori School, False Creek Elementary, Emily Carr Institute of Art & Design (ECIAD), Henry Hudson Elementary, St. Francis Xavier, Institute of Indigenous Government (IIG).

My resulting map summarizes the land use types and area that is at tsunami risk and identifies proper signage to the neighbourhoods affected.

Here are the skills I picked up in summary:
  • Combined spatial and tabular datasets to create a map of areas of tsunami risk in the City of Vancouver.
  • Calculated area of risk through summary tables to identify land use types possibly affected by a tsunami.
  • Reclassified DEM of the City of Vancouver to perform buffer proximity analysis and identify low-elevation areas at tsunami risk.