Not only does water flow, generally from a bore or dam, show both daily volume and rate per hour. It can inform the farmer, as to the integrity of the pipeline to the tank(s) and can be a useful tool in determining if the recipient paddock is under, or over stocked, at least from a water perspective.
As an example of identifying pipeline integrity, when we deployed water flow sensors on the first two lines on a property, it showed that the farmer was losing over 95,000 litres a week from just those two lines and was not aware of it.
The rate of flow can also be very helpful in identifying if a pump is operating to its rated capacity. If not, it could indicate that the pump may require some maintenance or repair.