Problem # $2$:

Average annual flows in river indus at a proposed dam site is $120BCM.$ The dam is to be built on a varying head from $50m$ to $100m$ on the turbines, estimate:

Water power potential from this proposed hydal power station if overall ef tiency of turbines is $88\%$ and that of generator is $92\%.$ Find the electrical energy available on the scheme in $kWH$ per year in one year. The hydrological data suggests that avg. head available for six months is $50m,$ for next three months, $80m$ and for rest of the months is $100m.$