The ordinates of a 2-hour unit hydrograph for a catchment are given as
The ordinate (in m^{3}/s) of a 4-hour unit hybrograph for this catchment at the time of 3 h would be _________
An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m^{3}/s. The flood hydrograph has a base flow of 20m^{3}/s. If the spatial average rainfall in the watershed for the duration of strom is 2 cm and the average loss rate is 0.4 cm/hour, the peak of 2-hour unit hydrograph (in m^{3}/s-cm, up to one decimal place) is _____________
At a station, Storm I of 5 hour duration with intensity 2 cm/h resulted in a runoff of 4 cm and Storm II of 8 hour duration resulted in a runoff of 8.4 cm. Assume that the $?$-index is the same for both the storms.
The Φ-index (in cm/h) is:
The intensity of storm II (in cm/h) is:
The ratio of actual evapo-transpiration to potential evapo-transpiration is in the range
The top width and the depth of flow in a triangular channel were measured as 4 m and 1 m, respectively. The measured velocities on the centre line at the water surface, 0.2 m and 0.8 m below the surface are 0.7 m/s, 0.6 m/s and 0.4 m/s, respectively. Using two-point method of velocity measurement, the discharge (in m^{3}/s) in the channel is
Group I contains parameters and Group II lists methods/instruments.
The drainage area of a watershed is 50 km^{2}. The $\mathrm\phi$ index is 0.5 cm/hour and the base flow at the outlet is 10 m^{3}/s. One hour unit hydrograph (unit depth = 1 cm) of the watershed is triangular in shape with a time base of 15 hours. The peak ordinate occurs at 5 hours.
The peak ordinate (in m^{3}/s/cm) of the unit hydrograph is
For a storm of depth of 5.5 cm and duration of 1 hour, the peak ordinate (in m^{3}/s) of the hydrograph is
A watershed got transformed from rural to urban over a period of time. The effect of urbanization on storm runoff hydrograph from the watershed is to
The ordinates of a 2-h unit hydrograph at 1 hour intervals starting from time t=0, are 0,3,8,6,3,2 and 0 m^{3}/s. use trapzodial rule for numerical intergration, if required.
What is the catchment area represented by the unit hydrograph?
A storm of 6.6 cm occurs uniformly over the catchment in 3 hours if ∅ -index is equal to 2mm/h and base flow is 5 m^{3}/s, what is the peak flow due to the storm?
The correct match of Group-I with Group-II is
One hour triangular unit hydrograph of a watershed has the peak discharge of 60m^{3}/sec.cm at 10 hours and time base of 30 hours. The $\phi$ index is 0.4 cm per hour and base flow is 15 m^{3}/sec.
The catchment area of the watershed is
If these is rainfall of 5.4 cm in 1 hour, the ordinate of the flood hydrograph at 15^{th }hour is
An isolated 4-hour storm occurred over a catchment as follows
The $\mathrm\phi$ index for the catchment is 10 mm/h. The estimated runoff depth from the catchment due to the above storm is
Ordinates of a 1-hour unit hydrograph at 1 hour intervals, starting from time t = 0, are 0, 2, 6, 4, 2, 1 and 0 m^{3}/s.
Catchment area represented by this unit hydrograph is
Ordinate of a 3-hour unit hydrograph for the catchment at t= 3 hours is