A.on the upstream side of the sluices
B.at the foot of the spillways
C.where the gradient suddenly chauges from a steep slope to a flat slope
D.when water moving in shooting flow impacts with water having a larger depth with streaming flow
A.on the upstream side of the sluices
B.at the foot of the spillways
C.where the gradient suddenly chauges from a steep slope to a flat slope
D.when water moving in shooting flow impacts with water having a larger depth with streaming flow