                     Environment and Climate Change Canada
                 Environnement et Changement climatique Canada
                                        
           Short Duration Rainfall Intensity-Duration-Frequency Data
          Donnes sur l'intensit, la dure et la frquence des chutes
                            de pluie de courte dure
                                        
                 Gumbel - Method of moments/Mthode des moments
                                        
                                   2022/10/31
                                        
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 MONTREAL PIERRE ELLIOTT TRUDEAU INTL                   QC        702S006       
                     
 Latitude:  45 28'N    Longitude: 73 44'W    Elevation/Altitude: 32         m
 
 Years/Annes :  1943 - 2021          # Years/Annes :     76   
 
================================================================================
 
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Table 1 : Annual Maximum (mm)/Maximum annuel (mm)
 
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          Year  5 min 10 min 15 min 30 min    1 h    2 h    6 h   12 h   24 h
         Anne
          1943   11.7   14.2   17.8   20.8   23.6   26.7   33.5   48.3   64.3
          1944    8.6   10.4   10.7   11.9   11.9   15.5   21.8   23.6   26.2
          1945   15.5   15.7   16.3   17.5   18.8   26.2   30.0   48.8   52.8
          1946   10.9   12.2   12.4   12.7   13.0   17.5   27.9   47.0   57.1
          1947    6.3    8.1   11.2   11.9   19.8   21.3   28.7   28.7   40.9
          1948    8.1   11.4   17.0   18.3   19.8   19.8   23.9   28.2   41.1
          1949    9.1   11.9   14.7   18.3   24.9   29.7   30.5   37.6   37.6
          1950    8.9   11.9   13.2   18.0   22.9   24.6   28.7   48.3   59.9
          1951    8.1    8.6    9.1   12.7   21.6   26.7   34.3   36.6   55.6
          1952   12.4   17.5   19.3   34.0   39.6   39.9   52.1   68.8   68.8
          1953    8.1    8.9    9.1   11.2   17.5   25.4   31.0   34.5   39.6
          1954    5.8    7.9    8.1   10.9   17.0   22.4   44.4   54.4   57.7
          1955   11.7   15.5   16.8   16.8   17.8   18.5   21.1   35.1   35.3
          1956    8.6    9.1   13.5   16.8   30.5   37.3   42.2   44.7   44.7
          1957   10.2   17.8   23.4   26.7   26.7   27.9   35.1   38.9   41.4
          1958    7.1   12.2   16.5   17.3   17.8   30.5   53.8   71.4   72.4
          1959    7.1   11.7   13.7   18.8   27.7   32.5   37.1   53.3   54.9
          1960    5.6    9.7   12.7   19.3   27.2   31.5   32.0   36.8   47.5
          1961    7.1    9.4   11.7   16.0   18.3   20.1   27.7   44.7   49.8
          1962   15.2   18.0   20.6   24.9   27.7   28.7   29.5   41.1   58.2
          1963   13.2   22.9   30.5   35.3   40.4   42.2   58.4   70.1   70.1
          1964    6.9   10.2   11.2   17.3   20.1   24.6   24.6   37.6   41.1
          1965   10.7   14.5   15.5   17.3   19.8   22.4   33.0   47.8   50.8
          1966   12.7   19.3   26.9   36.8   39.9   45.5   48.0   49.3   54.9
          1967    9.7   16.8   20.8   25.9   25.9   25.9   25.9   32.5   48.3
          1968    6.1   11.9   15.0   22.1   23.1   23.1   23.4   31.5   38.6
          1969    8.6   13.7   19.8   37.1   48.5   48.5   48.5   48.5   57.9
          1970   11.2   20.6   25.1   35.8   39.1   51.6   51.6   51.6   52.6
          1971    6.3    9.1   10.9   12.4   14.0   16.5   27.7   31.2   31.5
          1972    9.9   10.9   11.2   11.9   15.2   22.9   29.7   30.0   38.9
          1973   10.4   14.7   20.8   27.9   36.6   45.7   45.7   45.7   45.7
          1974   11.4   13.0   17.3   23.6   24.4   27.7   30.0   33.5   45.2
          1975    9.4   14.2   17.8   27.2   41.9   45.0   45.7   77.5   94.2
          1976    7.9    9.4   11.7   15.7   17.8   23.4   26.9   36.3   38.4
          1977    6.1    8.9   10.4   13.7   14.7   23.1   38.6   39.1   39.1
          1978    7.2    9.4   10.2   11.4   12.2   17.3   27.0   28.7   34.3
          1979    4.7    5.4    6.3    9.4   17.1   25.7   56.6   79.9   81.9
          1980    9.4   14.8   15.4   16.4   19.1   31.7   41.5   42.4   70.1
          1981    7.3   12.9   16.8   25.4   30.2   31.4   31.7   34.5   45.4
          1982    3.9    7.3   10.0   16.4   20.1   21.9   35.4   36.5   36.7
          1983    6.0   12.0   14.0   18.0   22.0   24.0   27.5   31.0   36.9
          1984    6.5    9.0   11.3   18.4   21.2   26.6   49.3   53.6   53.8
          1985    4.7    6.0    7.1    8.1    9.9   16.3   38.8   44.7   48.8
          1986    7.5   12.5   17.2   20.7   20.8   23.2   32.6   33.4   41.9
          1987   15.9   23.3   27.0   35.2   44.0   47.6   56.8   57.4   72.9
          1988   11.9   18.2   21.2   21.2   24.7   28.4   28.8   33.7   37.6
          1989    6.5   12.7   18.8   27.7   35.0   35.0   38.4   41.6   65.2
          1990   10.2   12.2   12.6   12.8   14.8   20.8   37.0   40.8   41.8
          1991    6.1   10.2   13.8   23.0   26.2   26.6   34.6   39.7   41.1
          1992    7.5   11.6   12.5   13.1   18.2   25.2   30.0   39.1   39.8
          1993    7.0   10.9   12.8   16.7   17.1   19.1   22.0   32.4   48.1
          1996    6.2   10.0   14.0   17.6   18.6   19.4   39.2   69.6  120.6
          1997    5.2    9.6   11.6   14.8   22.6   28.8   48.4   56.0   64.0
          1998   10.2   11.2   13.4   13.6   16.8   19.0   26.6   30.6   38.4
          1999    9.0   12.0   12.4   12.6   15.6   23.0   32.4   49.4   66.0
          2000    6.4    9.0   11.8   16.0   25.0   28.8   33.2   33.2   35.0
          2001    7.0    8.2    9.2   11.8   19.8   22.2   22.4   32.6   41.0
          2002   14.0   16.2   16.8   17.8   19.6   22.2   29.4   38.8   40.0
          2004    9.2   11.4   14.2   20.6   22.4   30.8   55.2   68.4   83.0
          2005    7.2   12.4   17.8   28.2   31.6   48.2   65.0   77.6   78.4
          2006    7.0   10.2   11.8   15.2   16.4   23.0   34.0   43.6   47.6
          2007    7.2   12.0   13.6   17.8   20.6   32.8   39.8   40.4   40.4
          2008   11.6   20.0   23.6   25.4   26.6   27.4   27.8   38.0   38.0
          2009    7.0   11.8   14.2   23.0   30.4   32.8   33.2   36.8   37.0
          2010    5.0    7.4   10.0   16.2   18.4   30.8   49.8   64.0   70.8
          2011    8.4   12.2   13.4   16.6   19.6   26.4   39.6   48.8   51.0
          2012    9.8   11.0   12.6   16.8   22.2   28.0   33.8   34.6   34.6
          2013    7.2   11.0   14.8   18.4   19.2   19.2   23.2   31.8   35.8
          2014    3.6    5.2    7.4   11.2   16.6   25.4   27.6   38.0   46.2
          2015    7.4   10.2   11.6   17.0   22.6   29.2   32.0   58.0   60.0
          2016    9.8   12.4   12.6   15.0   22.2   36.8   62.0   71.4   71.6
          2017    9.8   16.0   23.4   35.6   35.6   35.6   35.6   35.6   49.0
          2018    6.8   13.2   14.0   18.0   29.0   30.2   30.8   31.4   48.0
          2019    8.0    8.2   10.0   16.8   24.0   26.8   41.2   49.4   58.8
          2020    6.8    9.2   11.0   12.8   14.8   27.2   27.2   35.8   36.2
          2021    9.4   13.2   14.2   15.8   16.0   16.4   29.8   31.0   45.6
        ---------------------------------------------------------------------
        # Yrs.     76     76     76     76     76     76     76     76     76
        Annes
          Mean    8.5   12.2   14.7   19.1   23.2   27.9   35.9   44.0   51.1
       Moyenne
     Std. Dev.    2.6    3.8    4.9    7.0    8.2    8.4   10.4   13.4   16.1
    cart-type
         Skew.   0.76   0.89   1.03   1.10   1.13   1.06   0.93   1.08   1.58
   Dissymtrie
      Kurtosis   3.51   3.96   4.10   3.70   3.98   3.86   3.20   3.51   6.83
 
          *-99.9 Indicates Missing Data/Donnes manquantes
 
 Warning: annual maximum amount greater than 100-yr return period amount
 Avertissement : la quantit maximale annuelle excde la quantit
                 pour une priode de retour de 100 ans
          Year/Anne      Duration/Dure        Data/Donnes          100-yr/ans
                1963              15 min                30.5                30.0
                1996              24 h                 120.6               101.5
 
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Table 2a : Return Period Rainfall Amounts (mm)
           Quantit de pluie (mm) par priode de retour
 
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 Duration/Dure        2        5       10       25       50      100   #Years
                  yr/ans   yr/ans   yr/ans   yr/ans   yr/ans   yr/ans   Annes
          5 min      8.1     10.4     12.0     13.9     15.4     16.8       76
         10 min     11.5     14.9     17.1     19.8     21.9     23.9       76
         15 min     13.9     18.2     21.1     24.7     27.4     30.0       76
         30 min     18.0     24.2     28.3     33.5     37.4     41.2       76
          1 h       21.9     29.1     33.8     39.9     44.3     48.8       76
          2 h       26.5     33.9     38.8     45.0     49.6     54.2       76
          6 h       34.2     43.4     49.5     57.3     63.0     68.7       76
         12 h       41.8     53.7     61.5     71.4     78.8     86.1       76
         24 h       48.5     62.7     72.1     84.0     92.8    101.5       76
 
********************************************************************************
 
Table 2b :
 
 Return Period Rainfall Rates (mm/h) - 95% Confidence limits
 Intensit de la pluie (mm/h) par priode de retour - Limites de confiance de 95%
 
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 Duration/Dure        2        5       10       25       50      100   #Years
                  yr/ans   yr/ans   yr/ans   yr/ans   yr/ans   yr/ans   Annes
          5 min     97.1    125.2    143.8    167.3    184.7    202.0       76
                +/-  6.6 +/- 11.0 +/- 14.9 +/- 20.1 +/- 24.1 +/- 28.0       76
         10 min     69.2     89.1    102.3    119.0    131.3    143.6       76
                +/-  4.6 +/-  7.8 +/- 10.6 +/- 14.3 +/- 17.1 +/- 19.9       76
         15 min     55.7     73.0     84.4     98.8    109.6    120.2       76
                +/-  4.0 +/-  6.8 +/-  9.2 +/- 12.4 +/- 14.8 +/- 17.2       76
         30 min     35.9     48.4     56.6     67.0     74.7     82.4       76
                +/-  2.9 +/-  4.9 +/-  6.6 +/-  8.9 +/- 10.7 +/- 12.4       76
          1 h       21.9     29.1     33.8     39.9     44.3     48.8       76
                +/-  1.7 +/-  2.8 +/-  3.8 +/-  5.2 +/-  6.2 +/-  7.2       76
          2 h       13.3     17.0     19.4     22.5     24.8     27.1       76
                +/-  0.9 +/-  1.5 +/-  2.0 +/-  2.7 +/-  3.2 +/-  3.7       76
          6 h        5.7      7.2      8.3      9.5     10.5     11.4       76
                +/-  0.4 +/-  0.6 +/-  0.8 +/-  1.1 +/-  1.3 +/-  1.5       76
         12 h        3.5      4.5      5.1      6.0      6.6      7.2       76
                +/-  0.2 +/-  0.4 +/-  0.5 +/-  0.7 +/-  0.8 +/-  1.0       76
         24 h        2.0      2.6      3.0      3.5      3.9      4.2       76
                +/-  0.1 +/-  0.2 +/-  0.3 +/-  0.4 +/-  0.5 +/-  0.6       76
 
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Table 3 : Interpolation Equation / quation d'interpolation: R = A*T^B
 
R = Interpolated Rainfall rate (mm/h)/Intensit interpole de la pluie (mm/h)
RR = Rainfall rate (mm/h) / Intensit de la pluie (mm/h)
 T = Rainfall duration (h) / Dure de la pluie (h)
 
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       Statistics/Statistiques      2      5     10     25     50    100
                               yr/ans yr/ans yr/ans yr/ans yr/ans yr/ans
      Mean of RR/Moyenne de RR   33.8   44.0   50.8   59.3   65.6   71.9
    Std. Dev. /cart-type (RR)   33.6   43.4   49.9   58.1   64.2   70.2
        Std. Error/Erreur-type    6.6    9.6   11.6   14.1   15.9   17.8
               Coefficient (A)   20.1   26.2   30.2   35.2   38.9   42.6
         Exponent/Exposant (B) -0.698 -0.701 -0.702 -0.703 -0.704 -0.705
 Mean % Error/% erreur moyenne    6.6    7.6    8.0    8.5    8.7    8.9
