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

This process was carried out for each identified key community, utilizing available data. Results
are presented in section 5.5.3.
Figure 5-4. Petty Harbour- Maddox Cove (green dot) shown with
surrounding terrain, hydrography and watershed (red). Inset map
shows location on Avalon Peninsula, with the map extent in yellow,
watershed in red and town in green, overlain onto ASTER DEM.
5.4.2 Community Vulnerability to Indirect Flooding Impacts and Isolation
Newfoundland exhibits a relatively complex geography, full of peninsulas and constrictions,
which limit the placement and options for evacuation routes. As such, persistent, large floods
can have an isolating effect, as seen in numerous entries in the Flood Events Inventory. In
order to assess vulnerability to isolation, the physical setting, road location and distribution, and
population size were evaluated.
The physical setting of each of the key communities was analyzed in a GIS. ASTER terrain
data (USGS, 2012), imagery, and the GeoBase National Roads and Hydro Networks were
combined in order to assess each community‟s level of isolation. The terrain was examined for
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