Q1 (16 marks) Circle the most correct answer for the following statements:\ A storm with the time distribution shown in the table generates direct runoff of

4.9cm

. Find the

\\\\phi

-index for the storm.\ X.

0.82c(m)/(h)r

\ b)

0.65c(m)/(h)r

\ d)

0.58c(m)/(h)r

\ e)

0.52c(m)/(h)r

\ c)

0.72c(m)/(h)r

\

0\\\\deg

\ Q1 (16 marks) A storm with the d)

0.58c(m)/(h)r

\ dhe

\\\\phi

-index for the storm.\ The arithmetic mean of rainfall depths estimated using 7 rain gauges is

43mm

and the readings in

mm

are:

29,62,53,34

\ while the rest of gauges measure similar values. What is the rainfall depth (in

mm

) measured by the missing gauges?\ a) 44.5\ (b) 41\ c) 62\ d) 20\ e) 34\ f) None of these\ The following affects the density of rain gauges within an area:\ a) Topography only\ b) Climate only\ c) Topography and climate\ (d) Topography and type of rain gauge\ e) Type of rain gauge only\ f) None of these\ The following is true with respect to hydrographs:\ a) catchment characteristics control the falling limb because they tend to change after rainfall.\ b) rainfall intensity increases with time and controls the rising limb\ c) for a specific storm, one hydrograph represents flow at all points in the catchment.\ d) the time to peak is usually shorter in gently sloped areas.\ (A)All the above\ A) None of the above\ A

10.8km^(2)

catchment received

28mm

rainfall due to a

35-min

storm. The catchment was fully dry before the storm and the\ runoff rate was

2.8(m^(3))/(sec)

. What is the time required to discharge the entire amount of rainwater?\ a) 300 minutes\ b) 30 hours\ c) 108000 hours\ d) 3000 seconds\ e) 108000 minutes\ (6) None of these\ If the daily evaporation rate is

0.028(m)/()

day, the saturation vapour pressure is

760mmHg

and the actual vapour pressure is\

690mmHg

. What is the coefficient in Dalton's law?\ a) 0.8\ b) 0.0004\ d) 0.0008\ e) 0.62\ Q6. 4\ f) None of these\ A

10.8km^(2)

catchment received

15mm

rainfall due to a 35-min storm. The catchment was fully dry before and after the storm\ and there was no runoff generated at the outlet. What is the volume of the combined infiltration and evaporation losses?\ a)

16200m^(3)

\ b)

1620m^(3)

\ d)

0.0162m^(3)

\ e)

0.0162km^(3)

\ (C)

162000m^(3)

\ f) None of these\ In the system concept of the hydrologic budget:

I-Q=\\\\Delta (S)/(\\\\Delta )t

the term

\\\\Delta (S)/(\\\\Delta )t

represents:\ a) system storage\ (b) Storage change\ d) Temporal rate of storage change\ e) Spatial change of storage change\ c) Net storage