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 5-6 - Deer Lake Projected IDF Tables, 2020 Time Period, Precipitation intensities over the
specified duration, mm/hr
Maximum, 2020 timeframe
Return period (years)
2 5 10 20 25 50 100
5 min 51.8 73.9 88.1 101.9 106.3 119.6 132.9
10 min 36.5 50.8 60.3 69.3 72.2 81.0 89.6
15 min 29.9 40.2 46.9 53.4 55.4 61.7 68.0
30 min 23.0 28.5 32.2 35.7 36.8 40.2 43.6
1 hr 15.7 19.0 21.3 23.3 24.0 26.1 28.1
2 hr 11.1 14.0 16.0 17.7 18.3 20.0 21.9
6 hr 5.8 6.9 7.6 8.3 8.5 9.2 9.9
12 hr 3.6 4.2 4.7 5.0 5.2 5.6 6.0
24 hr 2.1 2.5 2.7 2.9 3.0 3.3 3.5
90th Percentile, 2020 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 50.3 72.4 86.8 100.6 105.1 118.6 131.9
10 min 36.1 50.4 59.9 68.9 71.8 80.6 89.3
15 min 29.3 39.6 46.3 52.8 54.9 61.2 67.5
30 min 21.9 27.5 31.2 34.7 35.8 39.3 42.8
1 hr 14.9 18.3 20.6 22.7 23.3 25.4 27.5
2 hr 10.6 13.4 15.4 17.1 17.7 19.4 21.2
6 hr 5.6 6.6 7.3 8.0 8.2 8.9 9.6
12 hr 3.5 4.0 4.5 4.9 5.0 5.4 5.8
24 hr 2.0 2.4 2.6 2.8 2.9 3.2 3.4
Mean, 2020 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 48.7 70.8 85.3 99.3 103.8 117.4 130.9
10 min 35.3 49.6 59.2 68.2 71.1 79.9 88.7
15 min 28.5 38.9 45.6 52.2 54.3 60.6 67.0
30 min 20.7 26.3 30.1 33.7 34.8 38.3 41.8
1 hr 14.1 17.5 19.8 21.9 22.5 24.7 26.8
2 hr 9.9 12.7 14.7 16.4 17.0 18.7 20.5
6 hr 5.3 6.3 7.0 7.7 7.9 8.6 9.3
12 hr 3.2 3.8 4.3 4.7 4.8 5.2 5.6
24 hr 1.9 2.3 2.5 2.7 2.8 3.1 3.3
AMEC Environment & Infrastructure 33