Civil Engineering :: Water Resources Engineering
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A unit hydrograph is a hydrograph of a rain storm of a specified duration resulting from a run-off of
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Pick up the correct statement from the following :
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If total run off of a basin of 50 hectares is 0.8 cm, the ordinate of Bernard's distribution graph, may be calculated by the formula (where Q is the discharge in cumecs at the given time)
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Pick up the correct statement from the following :
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If the grain size of soil increases
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The equation
which is used for determining the velocity of ground water flow in metres per day is known as -
Pick up the correct statement from the following :
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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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According to Thiem, the permeability of an aquifer may be obtained from the equation
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A.
The specified duration of unit hydrograph, is called unit duration
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B.
The rain during specified duration, is called unit storm
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C.
A unit hydrograph for a particular unit duration may be utilised for evaluating the run off hydrographs of other storms of like durations
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D.
The number of unit hydrographs for a given basin, is theoretically infinite
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E.
All the above.
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A.
A confined bed of impervious material laid over an acquifer, is known as an aquiclude
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B.
The top most water bearing strata having no acquifer, is known as non-artesion acquifer
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C.
The ordinary gravity wells which supply water from the top most water bearing strata, are called water table wells
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D.
A permeable stratum which is capable to yield appreciate quantities of ground water, is known as an aquifer
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E.
All the above.
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