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Rainwater harvesting: Sizing and modeling (view source)
Revision as of 20:40, 6 June 2017
, 7 years ago→Rapid
===Rapid===
===Rapid===
<p>Total cistern volume can be estimated by multiplying the depth of design storm the catchment area. 1 mm of rain over 1 m<sup>2</sup> results in 1 L of runoff.
<p>Total cistern volume can be estimated by multiplying the depth of design storm the catchment area. <br>1 mm of rain over 1 m<sup>2</sup> results in 1 L of runoff. <br>
For example, the 90th percentile event in Barrie is 26 mm, so every 1 m<sup>2</sup> of rooftop will generate 26 L during this storm event. A 2000 m<sup>2</sup> building would generate 54,000 L of runoff.
For example, the 90th percentile event in Barrie is 26 mm, so every 1 m<sup>2</sup> of rooftop will generate 26 L during this storm event. A 2000 m<sup>2</sup> building would generate 54,000 L of runoff.
The designers have three choices:-
The designers have three choices:-