TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 CONT

Since the low cost sensor technologies available present several limitations to their inclusion in this system, it was developed and implemented a low cost sensor, as described by Valente et al.(1997), based on the heat-pulse and capacitance methods. In the first method the maximum temperature rise measured at some distance from a line heat source can be used to determine the volumetric heat capacity and hence the water content of a porous media, such as soil. The second method relates the volumetric water content with the capacitance change of a probe, inserted in the soil, according to its dielectric proprieties. Simultaneous use of both methods improves sensor accuracy, gives built-in fault detection capability, and makes possible self-calibration procedures.... In a capacitance-based method, the soil moisture can be obtained by measuring the capacitance that varies with the dielectric properties of materials.  1, fiche 1, Anglais, - capacitance%2Dbased%20method

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Mesure de l'humidité du sol. On citera en particulier : - La méthode par prélèvement d'échantillons du sol [...] - La méthode neutronique (sonde à neutrons) [...]. - La méthode par choc thermique [...]. - Les méthodes basées sur la mesure d'une résistance ou d'une capacité électrique du sol ou d'éléments hygroscopiques laissés à demeure et en équilibre d'humidité avec le sol. Ces méthodes s'avèrent généralement peu fiables.  1, fiche 1, Français, - m%C3%A9thode%20bas%C3%A9e%20sur%20la%20mesure%20d%27une%20capacit%C3%A9%20%C3%A9lectrique%20du%20sol

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

... volume of water relative to the total volume of soil.  3, fiche 2, Anglais, - volumic%20water%20content

Record number: 2, Textual support number: 1 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).  3, fiche 2, Anglais, - volumic%20water%20content

Record number: 2, Textual support number: 2 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.  1, fiche 2, Anglais, - volumic%20water%20content

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

[...] rapport, [exprimé en pourcentage,] du volume d'eau contenu dans le sol sur le volume apparent de terre (terre + espace poreux).  1, fiche 2, Français, - humidit%C3%A9%20volumique%20du%20sol

Fiche 2,  Justifications,  Espagnol