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According to Francis' formula, due to each end contraction, the effective width and thus the discharge of a rectangular sharp-crested weir is reduced by what percentage of its head (H)?

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According to Francis' formula, due to each end contraction, the effective width and thus the discharge of a rectangular sharp-crested weir is reduced by what percentage of its head (H)?

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According to Francis' formula, due to each end contraction, the effective width and thus the discharge of a rectangular sharp-crested weir is reduced by what percentage of its head (H)?

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