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 5-10 - St. John's A 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 60.9 81.3 94.8 107.8 111.9 124.5 137.0
10 min 47.2 60.9 69.9 78.6 81.4 89.9 98.3
15 min 39.9 51.6 59.3 66.8 69.3 76.5 83.8
30 min 29.7 37.4 42.4 47.2 48.8 53.5 58.2
1 hr 21.5 26.2 29.3 32.3 33.2 36.1 39.0
2 hr 14.6 18.5 21.2 23.6 24.5 26.9 29.3
6 hr 8.0 9.7 10.8 11.8 12.2 13.2 14.3
12 hr 5.3 6.2 6.7 7.3 7.5 8.1 8.7
24 hr 3.2 3.6 4.0 4.4 4.4 4.8 5.1
90th Percentile, 2050 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 60.2 80.7 94.2 107.2 111.3 124.0 136.6
10 min 45.0 58.9 68.0 76.8 79.6 88.2 96.7
15 min 37.9 49.8 57.6 65.1 67.6 74.9 82.2
30 min 27.8 35.6 40.7 45.6 47.1 51.9 56.7
1 hr 19.9 24.7 27.8 30.8 31.7 34.7 37.6
2 hr 13.6 17.5 20.1 22.6 23.4 25.8 28.2
6 hr 7.7 9.3 10.4 11.5 11.8 12.8 13.9
12 hr 5.0 5.9 6.5 7.1 7.3 7.9 8.5
24 hr 3.0 3.5 3.9 4.2 4.3 4.7 5.0
Mean, 2050 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 58.7 79.3 92.9 106.0 110.1 122.9 135.6
10 min 43.2 57.2 66.4 75.3 78.1 86.8 95.4
15 min 36.3 48.2 56.1 63.7 66.1 73.5 80.9
30 min 26.3 34.1 39.3 44.2 45.8 50.6 55.5
1 hr 18.6 23.4 26.6 29.6 30.6 33.5 36.5
2 hr 12.7 16.6 19.2 21.7 22.5 24.9 27.3
6 hr 7.0 8.7 9.8 10.8 11.2 12.2 13.3
12 hr 4.5 5.4 6.0 6.6 6.8 7.4 8.0
24 hr 2.7 3.2 3.6 3.9 4.0 4.4 4.7
AMEC Environment & Infrastructure 37