Changes

The Ontario Ministry of the Environment Conservation and Parks, and other regulatory agencies perform much more rigorous statistical analyses than the example presented, and their resultant stormwater management targets vary accordingly.

The Ontario Ministry of the Environment Conservation and Parks, and other regulatory agencies perform much more rigorous statistical analyses than the example presented, and their resultant stormwater management targets vary accordingly.

==Example: City of Barrie, using years 2015 to 2017==

===Example: City of Barrie, using only years 2015 to 2017===

Daily rainfall records from ''BARRIE LANDFILL'' weather station were obtained for the years 2015 - 2017, from the [http://climate.weather.gc.ca/historical_data/search_historic_data_e.html Environment Canada historical data record].

Daily rainfall records from ''BARRIE LANDFILL'' weather station were obtained for the years 2015 - 2017, from the [http://climate.weather.gc.ca/historical_data/search_historic_data_e.html Environment Canada historical data record].

[[File:Barrie prob.jpg|border|600 px]]

[[File:Barrie prob.jpg|border|600 px]]

But the patterns aren't very easy to understand like this. The cumulative distribution function uses the same λ and is often a more useful way to understand the data.  

But the frequencies of the different rainstorms aren't very easy to understand like this.  

 

The cumulative distribution function uses the same λ and is a more useful way to read the data.  

<math>F\left(x,\lambda\right)=1- e^{-\lambda x}</math>

<math>F\left(x,\lambda\right)=1- e^{-\lambda x}</math>

[[File:Barrie cumulative.jpg|border|600 px]]

[[File:Barrie cumulative.jpg|border|600 px]]