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GATE 2018: Hydrology & Irrigation Rapid Revision Quiz

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Question 1

A 4-hr UH is used to derive an S-hydrograph. The coordinates of 4-hr UH are given below

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The equilibrium discharge (in m³/s) and its time of occurrence (in hour) for the derived S-hydrograph are

Question 2

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

Question 3

Irrigation water is to be provided to a crop in a field to bring the moisture content of the soil from the existing 18% to the field capacity of the soil at 28%. The effective root zone of the crop is 70 cm. If the densities of the soil and water are 1.3 g/cm³ and 1.0 g/cm³ respectively, the depth of irrigation water (in mm) required for irrigating the crop is ________

Question 4

Choose the incorrect statement:

Question 5

A water course commands an irrigated area of 800 hectares. The intensity of irrigation of rice this area is 55%. The transplantation of tice takes 12 days and total depth of water required by the crop is 45 cm on the field during the transplantation period. During the transplantation period, the useful rain falling on the field is 10 cm, then the discharge required in the water course, if losses of water is to be 20% in the water course, is _______cumec.

Question 6

For the data given in the table below, compute the peak demand (in cumec) and average discharge (in cumec)

Question 7

The annual floods for a large period were statistically analysed by Gumbel’s method, which yield

cumecs and

=3200 cumecs, then the probability of a flood magnitude of 30000 cumecs occurring in the next year is ____%.
Use Dimensionless variable,

Question 8

In a cultivated area, the soil has porosity of 45% and field capacity of 38%. For a particular crop, the root zone depth is 1.0 m, the permanent wilting point is 10% and the consumptive use is 15 mm/d. If the irrigation efficiency is 60%, what should be the frequency of irrigation such that the moisture content does not fall below 50% of the maximum available moisture ?

Question 9

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

Question 10

The width of elementary gravity dam whose height is 100m. Specific gravity of dam material is 2.2 and seepage coefficient at the base, C=0.8.

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ESE & GATE CE Irrigation Engineering Engineering Hydrology

Jan 13ESE & GATE CE