Question

A soil mass has coefficients of horizontal and vertical permeability as 9 x 10-7 cm/s and 4 x 10-7 cm/s, respectively. the transformed coefficient of permeability of an equivalent isotropic soil mass is

Answer 1

Answer:

Kx= 9x10-7 cm/s

Ky= 4x10-7

Keqv= sqrt(Kx x Ky) = sqrt (9x10-7 x 4x10-7)

Keqv= 6x10-7)_ Answer

Answer 2

Concept:

• coefficient of horizontal permeability of soil mass
• coefficient of vertical permeability of soil mass
• Calculating equivalent permeability

Given:

• horizontal permeability of soil mass kx = 9*10^-7 cm/s
• Vertical permeability of soil mass ky = 4*10^-7 cm/s

Find:

• The transformed coefficient of permeability Keq of an equivalent isotropic soil mass

Solution:

The transformed coefficient of permeability of an equivalent isotropic soil mass is the square root of the sums of the squares of horizontal permeability of soil mass and vertical permeability of soil mass.

Keq = √(kx^2 +ky^2)

keq = √9.7*10^-13

keq = 9.85 * 10^-7 cm/s

The transformed coefficient of permeability of an equivalent isotropic soil mass is 9.85 * 10^-7 cm/s.

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