Irrigation Engineering
To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls

All listed here
Of R.C.C. or steel plate 8 cm thick
Spaced at interval of 1½ times their heights
Of height ⅓rd to ¼th the depth of water in the main canal

ANSWER DOWNLOAD EXAMIANS APP

Irrigation Engineering
In a syphon aqueduct

Drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough
Canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough
Drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough
Canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough

ANSWER DOWNLOAD EXAMIANS APP