A side sluice gate is a flow-regulation device widely used in irrigati
on works for diverting the flow from a main channel to a secondary cha
nnel. The discharge of a side sluice gate may be obtained through the
concept of an elementary discharge coefficient for an elementary strip
along the gate length. Similar to the case of a normal sluice gate, t
he elementary discharge coefficient for a side sluice gate has been fo
und to be a function of channel flow depth to the gate opening ratio f
or free-flow conditions. It depends on an additional parameter, namely
, the ratio of the crest width to the gate opening for submerged-flow
conditions, For a broad-crested side sluice gate, the discharge coeffi
cient involves still one more parameter: the ratio of the crest width
to the gate opening.