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| where: | | where: |
| {{plainlist| | | {{plainlist| |
| *Y<sub>0.05</sub> = Five percent of the average annual yield (L) | | *''Y<sub>0.05</sub>'' = Five percent of the average annual yield (L) |
| *A = The catchment area (m<sup>2</sup>) | | *''A'' = The catchment area (m<sup>2</sup>) |
| *C<sub>vol, A</sub> = The annual runoff coefficient for the catchment | | *''C<sub>vol, A</sub>'' = The annual runoff coefficient for the catchment |
| *R<sub>a</sub> = The average annual rainfall depth (mm) | | *''R<sub>a</sub>'' = The average annual rainfall depth (mm) |
| *e = The efficiency of the pre-storage filter}} | | *''e'' = The efficiency of the pre-storage filter}} |
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