Q. If s is the potential infiltration, P is rainfall in cm in a drainage of a soil with fair pasture cover, the direct run off Q in cm is given by

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Q. With the usual meanings of letters, the following equation is used for determining the velocity of ground water flow in metres per day. It is known as

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Q. In the derivation of Thiem's formula given by following equation, the following assumption is not applicable

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Q. Burge formula given by the following equation cumecs is based upon

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Q. If P and A are the perimeter and area of a drainage basin, its compactness coefficient, is

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Q. The rate of rainfall for successive 10 minute periods of a 60 minute duration storm, are shown in the below figure. If the value of φindex is 3 cm/hour, the run off will be

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Q. From the pattern of the rainfall shown in the below figure, the total precipitation is

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Q. From the data of the rain storm shown in the below figure, the value of Windex is

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Q. Izzard formula for the time of concentration in minutes for the plots having no channels, is (where Lo is the length of overland flow in metres and Kp rainfall intensity in cm/hour)

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Q. The equation given below, which is used for determining the velocity of ground water flow in metres per day is known as

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Q. While determining the yield of a gravity well by pumping, the depth of water table in two tests wells at distances r1 and r2 from the centre of the main well were found to be s1 and s2 respectively. Assuming the coefficient of transmissibility of the soil as T, the discharge Q may be given by

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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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