Given flow chart illustrates how a hydroelectric power station produces electricity.
In overall there is tree major sections which consists of a reservoir dams which holds water flowing river, a big pipe which carries the water from reservoir and a generator which runs on the power of flowing water and generates electricity.
Water flows from a near by river is restricted by a huge dam which helps to store the water. There is intake valve is placed at the bottom of the high level reservoir, which is open at the daytime and will be closed on night. When the intake valve is opened water flows from the reservoir to generator through the big pipes placed between dam and generators. These pipes are in a declined position which is essential in increasing the speed of water flow. This water rushes of generators which is situated in the power station and creates electricity. In the generator kinetic energy of the water is converted into the electric energy. Generated electricity is then transmitted through the power lines to the national grid. The water passes through the turbine flows to a low-level reservoir. Although the turbines are used to generate electricity in the day time, in the night time it is used to pump water from low level reservoir to the high level reservoir. consequently the cycle is repeated continuously. 
 Given
  flow
 chart illustrates how a hydroelectric  
power
 station produces electricity.
In  
overall
 there is tree major sections which consists of a  
reservoir
 dams which holds  
water
 flowing river, a  
big
 pipe which carries the  
water
 from  
reservoir
 and a generator which runs on the  
power
 of flowing  
water
 and generates electricity.
Water  
flows
 from a  
near by
 river  
is restricted
 by a huge dam which  
helps
 to store the  
water
. There is intake valve  
is placed
 at the bottom of the high level  
reservoir
, which is open at the daytime and will  
be closed
 on night. When the intake valve  
is opened
  water
  flows
 from the  
reservoir
 to generator through the  
big
 pipes placed between dam and generators. These pipes are in a declined position which is essential in increasing the speed of  
water
  flow
. This  
water
 rushes of generators which  
is situated
 in the  
power
 station and creates electricity. In the generator kinetic energy of the  
water
  is converted
 into the electric energy. Generated electricity is then transmitted through the  
power
 lines to the national grid. The  
water
 passes through the turbine  
flows
 to a low-level  
reservoir
. Although the turbines are  
used
 to generate electricity in the day time, in the  
night time
 it is  
used
 to pump  
water
 from low level  
reservoir
 to the high level  
reservoir
.  
consequently
 the cycle  
is repeated
  continuously
.