Civil Engineering - GATE Exam Questions - Discussion


The ordinate of the Instantaneous Unit Hydrograph (IUH) of a catchment at any time t, is

[A]. The slope of the 1-hour unit hydrograph at that time
[B]. The slope of the direct runoff unit hydrograph at that time
[C]. Difference in the slope of the S-curve and 1-hour unit hydrograph
[D]. The slope of the S-curve with effective rainfall intensity of 1 cm/hr

Answer: Option D


No answer description available for this question.

Shams said: (Dec 31, 2019)  
The limiting case of a unit hydrograph of zero duration is known as instantaneous unit hydrograph (IUH). The ordinate of one IUH at any time 't' is the slope of S-curve of intensity 1 cm/hr.

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