The relation for discharge over a rectangular crest of a sarda fall is
Where, L = Length of crest in meters
B = top width of the crest in meters
H = depth of water in meters
1
\(Q = 1.835\;L{H^{\frac{3}{2}}}{\left( {\frac{H}{B}} \right)^{\frac{1}{6}}}\)
2
\(Q = 1.835\;L{H^{\frac{3}{2}}}{\left( {\frac{H}{B}} \right)^{\frac{1}{3}}}\)
3
\(Q = 1.99\;L{H^{\frac{3}{2}}}{\left( {\frac{H}{B}} \right)^{\frac{1}{6}}}\)
4
\(Q = 1.99\;L{H^{\frac{3}{2}}}{\left( {\frac{H}{B}} \right)^{\frac{1}{3}}}\)