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

Development of Projected Intensity-Duration-Frequency Curves
for Corner Brook and Goulds/Petty Harbour, Newfoundland May 16, 2012
2.1 Historical IDF curves
The historical IDF curve and underlying precipitation data were obtained from
Environment Canada. Figure 2-2, Figure 2-3 and Figure 2-4 show the historical IDF
curves for each of the three stations. Table 2-1, Table 2-3 and Table 2-5 show the
historic IDF data in tabular form. Table 2-6 shows the values for the updated version of
the historical IDF for the St. John’s A station; this table was developed by combining
data from the St. John’s A station with data from a nearby station at Windsor Lake
operated by the City of St. John’s (data provided by WRMD). This station is referred to
as the St. John’s Composite record. Table 2-2, Table 2-4 and Table 2-7 show the
underlying annual maximum precipitation values for the three Environment Canada
stations; data for the St. John’s Composite record were not available.
AMEC Environment & Infrastructure 4