Changes

===Rapid===

===Rapid===

<p>Total cistern volume can be estimated by multiplying the depth of design storm the catchment area. <br>One millimeter of rain landing on 1 m² results in 1 L of runoff. <br>

<p>Total cistern volume can be estimated by multiplying the depth of design storm the catchment area. <br>One millimeter of rain landing on 1 m² results in 1 L of runoff. <br>

For example, the 90th percentile event in Barrie is 26 mm, so every 1 m² of rooftop will generate 26 L during this storm event and a 2000 m² building generates 54,000 L of runoff. <br>

For example, the 90th percentile event in Barrie is 26 mm, so every 1 m² of rooftop will generate 26 L during this storm event.<br> A 2000 m² building would generate approximately 54,000 L during this 26 mm event. <br>

The designers have three choices:-

The designers have three choices:-

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