Small Hydro Development in Nayar river valley in Lesser ... - ESHA

UNGATED OVERFLOW TYPE WEIR
Has the advantage over the trench weir as it lends to
increase in head appreciably incase of low and
medium head projects thereby contributing to
increasing power.
Entry of bed load especially the shingles into the water
conductor system can be prevented at the intake by
keeping the sill level at a higher level than the bed level
of the river.
18