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Line 2: − {{textbox|{{plainlist|+ − *Five percent of the average annual yield can be estimated:+ − *<math>Y_{0.05} = A \times C_{vol, A}\times R_{a} \times e \times 0.05</math>+ − *Y<sub>0.05</sub> = Five percent of the average annual yield (L)+ − *A = The catchment area (m<sup>2</sup>)+ − *C<sub>vol, A</sub> = The annual runoff coefficient for the catchment+ − *R<sub>a</sub> = The average annual rainfall depth (mm)+ − *e = The efficiency of the pre-storage filter+ − }}}}+
Rainwater harvesting: Sizing and modeling (view source)
Revision as of 13:36, 17 August 2017
, 6 years ago→Simple
[[File:Cistern Size.png|thumb|Schematic diagram of the inputs and outputs to a rainwater harvesting cistern]]
[[File:Cistern Size.png|thumb|Schematic diagram of the inputs and outputs to a rainwater harvesting cistern]]
===Simple===
===Simple===
Five percent of the average annual yield can be estimated:
<math>Y_{0.05} = A \times C_{vol, A}\times R_{a} \times e \times 0.05</math>
where:
Y<sub>0.05</sub> = Five percent of the average annual yield (L)
A = The catchment area (m<sup>2</sup>)
C<sub>vol, A</sub> = The annual runoff coefficient for the catchment
R<sub>a</sub> = The average annual rainfall depth (mm)
e = The efficiency of the pre-storage filter
Filter efficiency (e) can be reasonably estimated as 0.9 pending manufacturer’s information.<br>
Filter efficiency (e) can be reasonably estimated as 0.9 pending manufacturer’s information.<br>