Flood routing is used to determine
- AThe time delay of flood peak in a reservoirCorrect
- BThe change in the velocity of water
- CThe storage capacity of a river basin
- DThe percolation of water into the soil
Solution
Concept
Flood routing
Formula
Continuity: I − O = dS/dt
Step-by-step solution
1. Flood routing follows a flood wave through a reservoir or a channel. 2. It gives the outflow hydrograph with attenuation and time lag of the peak.
Explanation
Reservoir or channel routing determines how the flood hydrograph changes shape and timing: the peak is reduced and delayed due to storage.
Shortcut
Routing = peak reduction + time lag.
Common mistake
Choosing storage capacity because storage is used in the method.
Correct answer: A) The time delay of flood peak in a reservoir