Hydrology Test ...

For a catchment with an area of 600 km² the maximum ordinate of an S-Curve obtained by a unit hydrograph of 4 hour duration is 

Flood discharge for a 100 year return period is calculated using Gumbel’s method.

The following data is available from the analysis:-

1) Mean of annual data series = 30000 m3/s

2) Standard deviation of annual data series = 300 m3/s

3) Frequency factor = 0.2

The estimated discharge for a flood of 100 year return period is (in m3/s up to 2 decimal places)

The effective rainfall hyetograph and a 5-hr unit hydrograph is given below in the table 1 and table 2 respectively

If the area of catchment is 56700 hectares then, the runoff depth of final direct runoff hydrograph will be

The ordinates of a flood hydrograph of 2-hour storm is given as follows:

If the storm generates 4 cm of excess rainfall and the base flow is 3 m³/s, then the peak ordinate of a 4-hour DRH with excess rainfall of 2 cm is _______.

Analysis of data on maximum one-day rainfall depth at Madras indicated that a depth of 280 mm had a return period of 50 years. Determine the probability (in percentage, up to two decimal places) of a one-day rainfall depth equal to or greater than 280 mm at Madras occurring two times in 15 successive years.

The peak of a flood hydrograph due to a 3-h duration isolated storm in a catchment is 180 m³/s. The total depth of 3-h rainfall is 2.7 cm and an average loss due to infiltration is 0.3 cm/hr. The peak discharge of the 3-hour unit hydrograph for a base flow of 30 m³/s is (in m³/s up to 2 decimal places)