In a Sarda type fall, the width B of the trapezoidal crest is given by
Where ‘H’ = depth of water and ‘d’ = drop-in bed level
1
B = 0.44 \(\sqrt {{\rm{H}} + {\rm{d}}} \)
2
B = 0.44 \(\sqrt {{\rm{H}} - {\rm{d}}} \)
3
B = 0.55 \(\sqrt {{\rm{H}} + {\rm{d}}} \)
4
B = 0.55 \(\sqrt {{\rm{H}} - {\rm{d}}} \)