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

Storm Duration
Storm Duration
Storm Duration
Development of Projected Intensity-Duration-Frequency Curves
for Corner Brook and Goulds/Petty Harbour, Newfoundland May 16, 2012
Table 5-7 - Deer Lake Projected IDF Tables, 2050 Time Period, Precipitation intensities over the
specified duration, mm/hr
Maximum, 2050 timeframe
Return period (years)
2 5 10 20 25 50 100
5 min 52.5 74.5 88.7 102.4 106.8 120.1 133.3
10 min 38.3 52.5 62.0 70.8 73.7 82.4 91.0
15 min 30.2 40.5 47.1 53.6 55.6 61.9 68.1
30 min 23.4 29.0 32.7 36.1 37.2 40.6 44.0
1 hr 16.0 19.3 21.6 23.6 24.3 26.4 28.4
2 hr 11.4 14.3 16.2 18.0 18.6 20.3 22.1
6 hr 6.0 7.0 7.7 8.4 8.6 9.3 10.0
12 hr 3.7 4.3 4.8 5.1 5.3 5.7 6.1
24 hr 2.2 2.6 2.7 3.0 3.0 3.3 3.5
90th Percentile, 2050 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 51.4 73.4 87.8 101.5 105.9 119.3 132.6
10 min 37.7 51.9 61.4 70.3 73.1 81.9 90.5
15 min 29.8 40.0 46.7 53.2 55.3 61.5 67.8
30 min 22.6 28.2 31.9 35.4 36.5 40.0 43.4
1 hr 15.4 18.8 21.1 23.1 23.8 25.9 27.9
2 hr 11.0 13.8 15.8 17.5 18.1 19.8 21.7
6 hr 5.8 6.8 7.5 8.2 8.4 9.1 9.8
12 hr 3.5 4.1 4.6 4.9 5.1 5.5 5.9
24 hr 2.0 2.4 2.6 2.9 2.9 3.2 3.4
Mean, 2050 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 49.4 71.5 85.9 99.8 104.3 117.9 131.3
10 min 36.4 50.6 60.1 69.1 72.0 80.8 89.5
15 min 28.8 39.2 45.9 52.5 54.5 60.9 67.2
30 min 21.2 26.8 30.6 34.1 35.2 38.8 42.2
1 hr 14.4 17.8 20.1 22.2 22.8 25.0 27.1
2 hr 10.2 13.0 15.0 16.7 17.3 19.0 20.8
6 hr 5.4 6.5 7.2 7.9 8.1 8.8 9.5
12 hr 3.3 3.9 4.4 4.7 4.9 5.3 5.7
24 hr 1.9 2.3 2.5 2.7 2.8 3.1 3.3
AMEC Environment & Infrastructure 34