Objective 3 - Model Application
Susceptibility and vulnerability models were run separately before being combined into the final risk model. The application of susceptibility, vulnerability and the final risk models were conducted via the model builder application in ArcGIS. Both susceptibility and vulnerability consisted of specialised factors which were inputted into their respective models. All components of the susceptibility and vulnerability models were clipped to the B.C. Southern Interior and subsequently reclassified and standardised for use in the raster calculator. Once the individual layers were created, they were combined together in the raster calculator to create the final wildfire risk layer.
Equation 2. MCE equation for fire Susceptibility Layer:
Susceptibility Layer = ((Water Constraint)*(Bare Land Constraint))*((0.365)(Mean Annual Precipitation) + (0.158)( Max Annual Temperature) + (0.158) (Biomass) + (0.158)(Euclidean Distance) + (0.064)(Stand Age) + (0.064)(Elevation) + (0.031)(Stand Type))
Figure 2. Constraint component for susceptibility model with respective input (blue), tools (yellow) and output (green) layers.
Figure 3. Fuel conditions component for susceptibility model with respective input (blue), tools (yellow) and output (green) layers.
Figure 4. Fuel type component for susceptibility model with respective input (blue), tools (yellow) and output (green) layers.
Figure 5. Ignition component for susceptibility model with respective input (blue), tools (yellow) and output (green) layers.
Figure 6. Overview of the susceptibility model with input layers (white) and their respective susceptibility categories (green). all inputs were calculated using the raster calculator (orange) to create the susceptibility map (blue).
Equation 3. MCE equation for Fire Vulnerability Layer:
Figure 7. Land value component of the vulnerability model. Input layers (blue) were clipped and reclassified with the clip and reclassify tools (orange) in ArcGIS to create the final layers to be used in the raster calculator of the vulnerability model.
Figure 8. Ecological vulnerability component of the vulnerability model. Input layers of species at risk and diversity indices (blue) were subsequently clipped and reclassified (orange) into output layers (green) for raster calculations.
Figure 9. Potential for loss of life component of the vulnerability model. The remoteness data layer (blue) was clipped, converted to raster and reclassified using the clip, polygon to raster and reclassify tolls (orange) in ArcGIS. Output layers from the tools are coloured green.
Figure 10. Overview of the model to create the vulnerability map. All vulnerability layer inputs and their respective categories (green) are inputted into the raster calculator. Remoteness was a provided data set that was not created in this study
Risk Model Overview
Equation 4. Equation for the final risk model.
Figure 11. Risk model process showing both vulnerability and susceptibility inputs into the raster calculator resulting in the final output.