A well is constructed to pump water from a confined aquifer. Two observation wells are constructed at distances of 100 m and 1000 m respectively. Water is pump from the pumping well at a rate of 0.2m3/min. At steady state, the draw down is observed as 2 m and 8 m respectively in the farthest and the nearest observation wells. Diameter of the test well is 1m. a. Determine the hydraulic conductivity in cm/s if the thickness of the aquifer is 20 m. b. Determine the drawdown in the test well.

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Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.