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

Event Duration
Event Duration
Development of Projected Intensity-Duration-Frequency Curves
for Corner Brook and Goulds/Petty Harbour, Newfoundland May 16, 2012
In addition, in the set of extreme event data, there were a number of months where
more missing values were reported for the 24-hour storm duration than for the other
storm durations. For a given month and parameter, if more than 4 days data were
missing, that month’s data for the 24-hour storm duration were deemed unusable and
were not used for the fitting and projection process.
Table 4-1 - Occurrence of Annual Extreme Precipitation, Deer Lake Station
Occurrence of Annual Extreme Precipitation Event, Deer Lake Station
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec multiple SUM
5 Minutes 1 1 - - 1 - 12 15 4 1 - - 3 38
10 Minutes - - - - - 2 12 15 4 1 1 - 3 38
15 Minutes - - - - 1 4 14 16 1 1 1 - - 38
30 Minutes - - - - 1 5 15 15 1 - - - 1 38
1 Hours - - - - 1 3 15 14 1 2 1 1 - 38
2 Hours - - - - 2 3 11 12 3 3 4 - - 38
6 Hours - - - - 1 5 6 11 5 6 3 1 - 38
12 Hours - - - - 1 4 6 7 9 7 2 1 1 38
24 hours - - 1 - 1 6 5 6 7 8 3 1 - 38
SUM 1 1 1 - 9 32 96 111 35 29 15 4 8 342
% 0.3% 0.3% 0.3% 0.0% 2.6% 9.4% 28.1% 32.5% 10.2% 8.5% 4.4% 1.2% 2.3% 100.0%
Table 4-2 - Occurrence of Annual Extreme Precipitation, St. John’s A Station
Occurrence of Annual Extreme Precipitation Event, St. John’s A Station
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec multiple SUM
5Minutes 2 - - - - 1 9 12 7 3 2 1 - 37
10Minutes 1 - - - - 1 10 13 7 1 2 1 1 37
15Minutes 1 - - - - 2 10 11 7 3 1 2 - 37
30Minutes 1 - - - - 2 9 11 6 3 3 1 1 37
1Hours 1 - - - - 2 10 13 6 3 1 - 1 37
2Hours 2 - - - - 3 9 9 4 6 2 1 1 37
6Hours 2 - - - 1 3 4 7 5 3 7 4 1 37
12Hours 1 1 - 2 2 2 3 7 5 3 7 4 - 37
24hours 1 1 1 2 4 1 2 7 6 5 3 3 1 37
SUM 12 2 1 4 7 17 66 90 53 30 28 17 6 333
% 3.6% 0.6% 0.3% 1.2% 2.1% 5.1% 19.8% 27.0% 15.9% 9.0% 8.4% 5.1% 1.8% 100.0%
AMEC Environment & Infrastructure 20