The objective of this paper is to present the contribution of a new dielectric constant characterisation for the modelling of radar backscattering behaviour. Our analysis is based on a large number of radar measurements acquired during different experimental campaigns (Orgeval'94, Pays de Caux'98, 99). We propose a dielectric constant model, based on the combination of contributions from both s...

Leaf water potential, leaf relative water content, and relative transpiration of barley were determined daily under greenhouse conditions at 3 growth stages: tillering to boot, boot to heading, and heading to maturity. The leaf moisture characteristic curve (relative water content versus leaf water potential) was the same for leaves of the same age growing in the same environment for the first ...

Upon an increase of moisture, unsaturated soil may collapse or swell, depending on the loading state and history. This important characteristic must be realistically reproduced by a constitutive model aimed for practical applications. In addition to collapse/swelling, other essential features, such as deformation and failure following arbitrary shearing paths, must also be realistically reprodu...

To investigate the dynamic thermal resistance of woven fabrics in different wetting states, ten commonly used clothing were selected and tested for fabric under levels water saturation accordance with Chinese national standards. Based on Mangat’s eight prediction models, study improved models by replacing original moisture content saturation. The suitability predicting wet states was compared u...

the simultaneous flow of oil and water in porous media is described by relative permeability curves, mainly derived from laboratory experiments. relative permeability is of paramount importance in predicting reservoir production performance and drive mechanisms and its value depends largely on the volume fraction of fluids present in the test samples. nowadays x-ray scanners are one of the most...

The importance of degree soil saturation in geotechnical problems resulted inclusion unsaturated mechanics various applications for several decades. However, spite recent progress remotely sensed moisture measurement, community has not yet taken advantage these advances analysis soils. NASA launched its Soil Moisture Active Passive (SMAP) satellite 2015 with the aim providing surface and root z...

Soil gas diffusivity (Dp/Do, diffusion coefficients in soil and free air, respectively) its relation to moisture is of great importance for describing quantifying essential provisional regulatory functions associated with terrestrial ecosystems such as aeration greenhouse (GHG) emissions. Because migration systems predominantly controlled, becomes a fundamental prerequisite quantify diffusive f...

the quality of the river water is assessed in different months in different stations to evaluate the change in the quality in re1ation with the various point sources along the river. thirteen parameters were measured in the samples manually taken from three meters off shore in 20 cm. depth in four points representing the quality in four reaches under consideration. the results revealed that nat...