Q. According to Thiem, the permeability of an aquifer may be obtained from the equation

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Q. Boston society of Civil Engineer's formula given by following equation, in cumecs/square km is based upon

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Q. The area enclosed by the adjacent isohyets of a catchment basin are shown under. The average depth of annual precipitation in the catchment basin will be

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Q. The rational formula for calculating the discharge, is (where A is the area of basin and Po is one hour rainfall)

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Q. The formula for calculating the overland flow time (To) in hours for any basin, is (where Lo is the distance of the critical point and H is the difference in elevation)

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Q. If ω is unit weight of water, Q the discharge in cumecs, H the total head lift and η, the efficiency of the pump, the H.P. of the motor is

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Q. Precipitation caused by lifting of an air mass due to the pressure difference, is called

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Q. The standard height of a standard rain gauge, is

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Q. In India, rain fall is generally recorded at

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Q. A recording type rain gauge

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Q. In India the recording type rain gauge generally used, is

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Q. The run off a drainage basin is

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Q. For computing the run off volumes of large areas, number of infiltrations used are

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Q. From the Survey of India map, the distance of the critical point is 20 km and difference in elevation is 193 m. The over land flow time, is

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Q. If the area of storm hydrograph is equal to 10² cm, the ordinates of a unit hydrograph may be obtained by dividing the ordinates of the storm hydrograph by

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Q. If the potential infiltration of a water shed having a soil with fair pasture cover, is 10 cm and rainfall is 12 cm, the direct run off is :

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Q. The quantity of water retained by the sub-soil against gravity, is known

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Q. Pick up the incorrect statement from the following :

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Q. If the viscosity of ground water is 1.00, the Slitcher's constant is 400, the effective size of soil particles in acquifer is 0.5 mm and hydraulic gradient is 1 in 80, the velocity of flow is

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Q. Water contains

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