How to Calculate Degree of Saturation

The degree of saturation is the ratio of the volume of water in a soil to the volume of voids.

S = \frac{V_w}{V_v}\times 100\%\newline\newline    =\frac{V_w}{V_g + V_w}\times 100\%
Where:
S = Degree of Saturation
Vw = Volume of water (m3 or ft3)
Vv = Volume of voids (m3 or ft3)
Vg = Volume of air (m3 or ft3)

The degree of saturation is thus a ratio which can be between 0 and 1. It can also be expressed as a percent.

It is the percentage of the void space which is filled with water. The rest is air.

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