Degree of Saturation

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

partially saturated soil 1Degree of saturation, abbreviated as S, a dimensionless number, is the ratio of volume of water to the volume of voids.


Degree of Saturation formulas

\(\large{ S = \frac{V_w}{V_v } \; 100 }\) 
\(\large{ S =  \frac{w \; SG_s }{ e }  }\)


 Units English Metric
\(\large{ S }\) = degree of saturation (expressed as %) \(\large{dimensionless}\)
\(\large{ SG_s } \) = specific gravity of soil \(\large{dimensionless}\)
\(\large{ e }\) = void ratio \(\large{dimensionless}\)
\(\large{ V_v }\) = volume of voids (air and water) \(\large{ft^3}\) \(\large{m^3}\)
\(\large{ V_w} \) = volume of water \(\large{ft^3}\) \(\large{m^3}\)


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Tags: Equations for Volume Equations for Soil Equations for Geotechnical