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==Design==
==Design==
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The required volume for a small forebay, serving up to 2 Ha (''V<sub>f</sub>'', m³), may be calculated as:
+
1. The required volume for a small forebay, serving up to 2 Ha (''V<sub>f</sub>'', m³), may be calculated as:
:<math>V_{f}=A_{c}\times R\times L_{o} \times F_{c}</math>
:<math>V_{f}=A_{c}\times R\times L_{o} \times F_{c}</math>
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}}
}}
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The area of the forebay (''A<subf</sub>'') designed for 80 % capture efficiency (i.e. R = 0.8) may be calculated as:
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2. 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_{f}}</math>
:<math>A_{f}=\frac{12\times Q}{V_{f}}</math>
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}}
}}
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Check that the forebay depth (''d<sub>f</sub>'', m) ≤ 0.3 m:
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3. Check that the forebay depth (''d<sub>f</sub>'', m) ≤ 0.3 m:
: <math>d_{f}=\frac{V_{f}}{A_{f}}</math>
: <math>d_{f}=\frac{V_{f}}{A_{f}}</math>
===Example calculation===
===Example calculation===
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−
==Gallery==
==Gallery==