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−The area of the forebay designed for 80 % capture efficiency (i.e. R = 0.8) may be calculated as:
+The area of the forebay (''A<subf</sub>'') designed for 80 % capture efficiency (i.e. R = 0.8) may be calculated as:
:<math>A_{f}=\frac{12\times Q}{V}</math>
+:<math>A_{f}=\frac{12\times Q}{V_{f}}</math>
{{plainlist| 1=Where:
{{plainlist| 1=Where:
−*''Q'' = Design flow rate (m³/s)