Water Content

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

partially saturated soil 1Water content, abbreviated as w, also called moisture content, a dimensionless number, is the ratio of weight of soil to the weight of water or the quantity of water contained in a material.


water content formulas

\(\large{ w = \frac{M_w}{M_s }   }\)  
\(\large{ w = \frac{W_w}{W_s }   }\)  
\(\large{ w = \frac{ S \; e }{ G_s }   }\)  


 Units English Metric
\(\large{ w }\) = water content (% moisture contemt) \(\large{dimensionless}\)
\(\large{ S }\) = degree of saturation (expressed as %) \(\large{dimensionless}\)
\(\large{ M_s} \) = mass of solid \(\large{lbm}\) \(\large{kg}\)
\(\large{ M_w }\) = mass of water \(\large{lbm}\) \(\large{kg}\)
\(\large{ G_s }\) = specific gravity of soil \(\large{dimensionless}\)
\(\large{ e }\) = void ratio \(\large{dimensionless}\)
\(\large{ W_s} \) = weight of solid \(\large{lbf}\) \(\large{N}\)
\(\large{ W_w }\) = weight of water \(\large{lbf}\) \(\large{N}\)


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Tags: Equations for Weight Equations for Soil Equations for Geotechnical