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− | {{plainlist|
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− | *Five percent of the average annual yield can be estimated:
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− | *<strong>Y<sub>0.05</sub>= A × C<sub>vol, A</sub> × R<sub>a</sub> × e × 0.05</strong>
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− | *Y<sub>0.05</sub> = Five percent of the average annual yield (L)
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− | *A = The catchment area (m<sup>2</sup>)
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− | *C<sub>vol, A</sub> = The annual runoff coefficient for the catchment
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− | *R<sub>a</sub> = The average annual rainfall depth (mm)
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− | *e = The efficiency of the pre-storage filter
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− | {{demo|class=woo|
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− | * Five percent of the average annual yield can be estimated
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− | * e = The efficiency of the pre-storage filter
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