Flow duration curve is a plot of
- AFlow against its time of occurrence in chronological order.
- BFlow in ascending order against percentage time in chronological order.
- CFlow that equalled or exceeded against percentage time.Correct
- DFlow against duration of time for which it is sustained.
Solution
Concept
Flow duration curve
Step-by-step solution
1. It plots flow against the percentage of time it is equalled or exceeded.
Explanation
The curve is a cumulative frequency curve.
Why the other options are wrong
Chronological plots are hydrographs.
Shortcut
FDC = exceedance.
Correct answer: C) Flow that equalled or exceeded against percentage time.