Flood Risk and Vulnerability Analysis Project - Atlantic Climate ...

6.3.5 Sub-regions Prioritization Considerations
Table 6-11 presents the results of summary calculations of the Priority Factors included in Table
6-1 throughTable 6-3. This summary enables the evaluation and prioritization of Sub-regions
based on their communities‟ ratings within each the three linked factors: Climate, Watershed
Characteristics, and Socio-Economic Factors. This summary can assist decision makers with
initial implementation of mitigation and adaptation strategies. In the Table, the higher the values
relative to others in the column, indicates the higher the flood vulnerability from that linked
factor.
As not all Priority Factors equally characterize flood vulnerability, a weighted average was
developed to further evaluate the factors presented Table 6-1 throughTable 6-3. The following
list presents the multiplier used for each Priority Factor when calculating the values in Table
6-11.
Weighting Description
1 Soil Group
1 Average Slope
2 Location
2 Drainage Density
Weighting Description
1 Precipitation
2 Sea Level Rise
2 Hurricanes/Tropical Storms
Weighting Description
1 Population
2 Flood Damages Estimates
2 Growth
Table 6-8. Watershed Characteristics Weighting
Table 6-9. Climate Change Weighting
Table 6-10. Socio-Economic Factors Weighting
The above multipliers were applied to the respective Priority Factor (PF) in each table, and then
a weighted average was calculated to yield an overall factor for each linked factor (Watershed
Characteristics, Climate Change, and Socio-Economic). The weighted averages presented in
Table 6-11 were calculated using the following formulas and using the factor weightings in
Tables 6-8 through 6-10.
TA1112733 page 152