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 5-11 - St. John's A Projected IDF Tables, 2080 Time Period, Precipitation intensities over the
specified duration, mm/hr
Maximum, 2080 timeframe
Return period (years)
2 5 10 20 25 50 100
5 min 63.7 83.9 97.3 110.1 114.1 126.6 139.0
10 min 47.4 61.1 70.1 78.8 81.5 90.1 98.4
15 min 40.0 51.8 59.5 67.0 69.4 76.7 83.9
30 min 29.8 37.5 42.6 47.4 48.9 53.6 58.3
1 hr 21.6 26.4 29.5 32.4 33.3 36.2 39.1
2 hr 14.7 18.6 21.3 23.7 24.6 27.0 29.4
6 hr 8.6 10.2 11.3 12.4 12.7 13.7 14.8
12 hr 5.7 6.5 7.1 7.7 7.9 8.5 9.1
24 hr 3.4 3.9 4.3 4.6 4.7 5.1 5.4
90th Percentile, 2080 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 62.3 82.6 96.1 109.0 113.0 125.5 138.0
10 min 46.0 59.8 68.9 77.6 80.4 89.0 97.4
15 min 38.8 50.6 58.4 65.9 68.3 75.6 82.9
30 min 28.7 36.4 41.5 46.4 47.9 52.6 57.4
1 hr 20.6 25.4 28.5 31.5 32.4 35.3 38.2
2 hr 14.0 18.0 20.6 23.1 23.9 26.3 28.7
6 hr 7.7 9.4 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, 2080 Time Period
Return period (years)
2 5 10 20 25 50 100
5 min 60.0 80.5 94.0 107.0 111.1 123.8 136.4
10 min 43.5 57.5 66.7 75.6 78.4 87.1 95.6
15 min 36.6 48.5 56.4 64.0 66.4 73.8 81.1
30 min 26.5 34.4 39.5 44.5 46.0 50.9 55.7
1 hr 18.8 23.7 26.8 29.8 30.8 33.7 36.7
2 hr 12.8 16.7 19.4 21.8 22.7 25.1 27.5
6 hr 7.0 8.7 9.8 10.9 11.2 12.2 13.3
12 hr 4.5 5.4 6.0 6.7 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 38