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If a 4-h unit hydrograph of a catchment has a peak ordinate of 60 m3/s, the peak ordinate of an 8-h unit hydrograph for the same catchment will be
- a)> 60 m3/s
- b)- 60 m3/s
- c)< 60 m3/s
- d)Data inadequate
Correct answer is option 'C'. Can you explain this answer?
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If a 4-h unit hydrograph of a catchment has a peak ordinate of 60 m3/s...
Peak Ordinate of 4-h vs 8-h Unit Hydrograph
Peak ordinate of a unit hydrograph represents the maximum flow rate at a specific time interval. When comparing the peak ordinates of unit hydrographs for different durations, certain relationships can be observed.
Explanation:
4-h Unit Hydrograph
- Peak ordinate: 60 m3/s
8-h Unit Hydrograph
- The peak ordinate of an 8-h unit hydrograph for the same catchment will be less than 60 m3/s (option C).
- This is because as the duration of the unit hydrograph increases, the peak ordinate typically decreases. This is due to the smoothing effect that occurs as the hydrograph is spread out over a longer time period.
- Therefore, based on the relationship between the peak ordinates of unit hydrographs of different durations, the peak ordinate of an 8-h unit hydrograph would be expected to be less than the peak ordinate of a 4-h unit hydrograph for the same catchment.
Conclusion:
- The peak ordinate of an 8-h unit hydrograph for the same catchment will be less than 60 m3/s.
Peak ordinate of a unit hydrograph represents the maximum flow rate at a specific time interval. When comparing the peak ordinates of unit hydrographs for different durations, certain relationships can be observed.
Explanation:
4-h Unit Hydrograph
- Peak ordinate: 60 m3/s
8-h Unit Hydrograph
- The peak ordinate of an 8-h unit hydrograph for the same catchment will be less than 60 m3/s (option C).
- This is because as the duration of the unit hydrograph increases, the peak ordinate typically decreases. This is due to the smoothing effect that occurs as the hydrograph is spread out over a longer time period.
- Therefore, based on the relationship between the peak ordinates of unit hydrographs of different durations, the peak ordinate of an 8-h unit hydrograph would be expected to be less than the peak ordinate of a 4-h unit hydrograph for the same catchment.
Conclusion:
- The peak ordinate of an 8-h unit hydrograph for the same catchment will be less than 60 m3/s.
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If a 4-h unit hydrograph of a catchment has a peak ordinate of 60 m3/s, the peak ordinate of an 8-h unit hydrograph for the same catchment willbea)> 60 m3/sb)- 60 m3/sc)< 60 m3/sd)Data inadequateCorrect answer is option 'C'. Can you explain this answer?
Question Description
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