W Mw Ms

soil water content w have the following relationship:

The maximum water content in the soil is denoted as the water content at saturation 0s. In some cases the amount of water in the soil is thus computed as a percentage of saturated water content s (%) and is expressed in terms of degree of saturation with respect to the water, s = 0/0s x 100. However, evaluating the volumetric water content at saturation is highly uncertain, if not impossible, in swelling shrinking soils or as phenomena of consolidation of the soil matrix occur. In such cases, a useful expression of soil water content is the moisture ratio ft, defined as where Vs (m3) is the volume of solids.

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