Irrigation Engineering
In case of a trapezoidal notch fall

Top length of the piers should not be less than their thickness
Splay downstream from the notch section is 22½°
All listed here
Splay upstream from the notch section is 45°

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Irrigation Engineering
Bligh's theory of seepage assumes

Less weightage to horizontal creep than vertical creep
More weightage to horizontal creep than vertical creep
Equal weightage to the horizontal and vertical creep
Loss of head follows the sine curve

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