Units and Measurements 2(Flow)

You don't need to know calculus to understand water flow measurements. The math involved is easier for a high school student, as without noticing, we practice similar rate measurements in everyday life like speed or wages.

Water flow is commonly measured as amount of water flowing every second.
For example, if a tap connected with a 100 liters tank empties it in 100 seconds, tap's flow rate is 1 litre per second.
Similarly if a tap fills a 100 liters tub in 100 seconds, tap's flowrate is 1 litre per second.
for bigger flows like canal or river flow, cusecs and cumecs are used.

1 Cusec flow is 1 cubic meter per second.
1 Cumec flow is 1 cubic meter per second.
Cumec is comparatively  bigger unit. It is iequal to 35.3147 cusecs
Cusec is most commonly used flow rate unit in Pakistan.

many large irrigation canals and link canals in Pakistan have flow rates between 10 to 25 thousand cusecs.

Our rivers have obviously larger average flowrates during summer, ranging from 50 to 250 thousand cusecs

 2010 Indus flood was measured around 1250 thousand cusecs in Sindh.