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VOLUMETRIC SOIL WATER CONTENT [2 records]

Record 1 2005-09-07

English

Subject field(s)
  • Soil Science
  • Scientific Measurements and Analyses
DEF

... volume of water relative to the total volume of soil.

CONT

Another way to express the moisture content of a soil is the volumetric water content ... The use of volumetric water content rather than wetness is often more convenient because it is more directly adaptable to the computation of fluxes and water quantities added or subtracted to a soil. Also, volumetric water content represents the depth ratio of soil water, i.e., the depth of water per depth of soil. In Narrabri the volumetric water content was tested by two different methods, these being the Neutron Probe and by Time Domain Reflectometry (TDR).

CONT

Neutronometry: counting of the neutrons thermalized by inelastic shocks on the nuclei of hydrogen atoms using a 'neutron probe'. The volumic water content is determined on the whole soil profile. The equipment is expensive, calibration is delicate, and its use is subject to constraints (radioprotection). However, it can provide rapid and sequential measures at the same place without disturbing the soil.

French

Domaine(s)
  • Science du sol
  • Mesures et analyse (Sciences)
DEF

[...] rapport, [exprimé en pourcentage,] du volume d'eau contenu dans le sol sur le volume apparent de terre (terre + espace poreux).

Key term(s)
  • humidité volumétrique

Spanish

Save record 1

Record 2 2003-02-24

English

Subject field(s)
  • Soil Science
  • Drainage and Irrigation (Agric.)
CONT

The soil volumetric heat capacity (J °C-1 m³) is determined following De Vries (1963) ... and is given by Equation 158, where [thêta subscript s] is the input saturated volumetric water content of a specified soil.

French

Domaine(s)
  • Science du sol
  • Drainage et irrigation (Agriculture)
CONT

En hydrogéologie cette réserve [en eau du sol] correspondant à un abaissement de la nappe est donnée par l'écart entre les humidités volumiques à saturation, et à la capacité au champ, multiplié par la hauteur d'abaissement de la nappe.

OBS

réserve en eau du sol : Hauteur d'eau équivalente que le sol peut céder en se desséchant.

Spanish

Save record 2

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