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CHAPTER - III
MEASUREMENT OF FLOWOF WATER
Measurement of discharge of flowing water through rivers and canals and also
from tubewells is essential to design any irrigation/water supply
structures to cater to the need of required water. There are several methods to
determine the discharge of flowing water for both surface water and
groundwater.
Measurement of surface water :
Stream flow or surface water flow is the discharges that flow in a particular
section of the stream/canal at a particular time. There are several methods to
determine the discharge of flowing water in a river or streamflow or canals.
These are :
1.
Area velocity method
2.
Weir method
3.
Chemical method
4.
Stage discharge curve method
5.
Meter flume method
1)
Area Velocity Method
The discharge can be calculated from the simple formula :
Q (Discharge) = Area x velocity
The equation thus shows that we must know the velocity of the flowing water
and cross-section area of the steams/rivers/canals to find out the
discharge.
