Worked Examples
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Example 1: Determine the following:

(a) Equivalent coefficient of vertical permeability of the three layers
(b) The rate of flow per m2 of plan area
(c) The total head loss in the three layers

Solution:
(a) = = 1.33 x 10-3 cm/s

(b) Considering an area A = 1 m2 =1 x 104 cm2

q = k.i.A = = 7 x 10-4 x 0.25/2 x (1x104) = 0.875 cm3/s per m2 of plan area

(c) For continuity of flow, velocity is the same.

  , where = total head loss in three layers

. = =   = 1.184 m

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