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BARC 2020: Hydrology and Irrigation Nuclear Quiz 1

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Question 1

The inflow and outflow hydrographs of a reservoir routing are shown below

The peak attenuation (in m3/sec) and peak lag (in hr) are respectively

Question 2

An annual flood series contains 100 years of flood data. For a return period of 200 years the Gumbel's reduced variate can be taken as ________

Question 3

A storm occurs over a catchment of area 4000 Ha with a uniform intensity of 1.5 cm/hr for a period of 9 hours. The runoff obtained from the catchment area was estimated as 3 Mm3. The average infiltration rate during the storm over the catchment will be ___ mm/hr.

Question 4

A Class-A pan with diameter 122cm is used to determine the evaporation from the lake. At a nearby raingauge station 4.2 mm of rainfall is measured on a particular day. Determine the depth(in mm) of evaporation from lake for the same day if 12.6 litre of water is added to restore the water level to its initial water level at beginning of the day.

Question 5

An aquifer is spread over 300 Ha. The water table in the aquifer was 6 m below the ground surface. A drawdown of 3 m was observed after sometime. Find the change in the ground water storage if the porosity of the aquifer is 0.43 and the specific retention is 0.15.

Question 6

For a gravity dam, the coefficient of friction ( µ) is 0.66 and the ratio of restoring force to overturning force is 2.4 . Then factor of safety against sliding is

Question 7

The silt factor used by Lacey in his regime theory was equal to 1.0 for upper Bari-doab alluvium. What was the median size of the alluvium?

Question 8

Match List I with List-II and select the correct answer.

Question 9

The potential evapotranspiration and the actual evapotranspiration for a region is 4mm/h and 2.36mm/h respectively. Classify the agricultural drought in terms of Aridity Index

Question 10

A canal was designed to supply the irrigation needs of 1000 ha of land growing rice of 150 days base period and having a delta of 125cm. If the canal water is used to irrigate wheat of base period of 120 days and having a delta of 50cm,the area that can be irrigated is
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May 12ESE & GATE CE