total water content of the soil is known as soil moisture.
total water content of the soil is known as soil moisture.
total water content of the soil is known as?
soil moisture
water content









































water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, crops, or wood. water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation. it can be given on a volumetric or mass (gravimetric) basis.









































section::::definitions.









































volumetric water content, θ, is defined mathematically as:
water content
the normalized water content, formula_19, (also called effective saturation or formula_20) is a dimensionless value defined by van genuchten as:









































where formula_22 is the volumetric water content; formula_23 is the residual water content, defined as the water content for which the gradient formula_24 becomes zero; and, formula_25 is the saturated water content, which is equivalent to porosity, formula_26.









































section::::measurement.









































section::::measurement.:direct methods.









































water content can be directly measured using a known volume of the material, and a drying oven. volumetric water content, θ, is calculated via the volume of water formula_2 and the mass of water formula_8:









































where
water content