Irrigation Engineering
According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

2.00 D
1.25 D
1.75 D
1.50 D

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Irrigation Engineering
An artesian aquifer is the one where

water surface under the ground is at atmospheric pressure
water is under pressure between two impervious strata
water table serves as upper surface of zone of saturation
None of these

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