This study was carried out in three mountainous different soil textures and two depths. Field measurements of texture bulk density, laboratory water retention at field capacity (–33 kPa) permanent wilting point (–1500 kPa), were taken to implement Rosetta. Calculated values van Genuchten parameters then compared measured values. Results showed that Rosetta could be used obtain for a with textur...

abstract different definitions have been proposed for soil quality. various soil properties have been suggetsted as soil quality indices by researchers. this research was conducted to study the relationship between slope of retention curve at its inflection point (s index) and other soil physical quality indices, because the reserches between s index and soil physical properties are little. thi...

Plant roots and biochar amendment cause changes in soil structure hydraulic properties; however, their interactive influences are still inadequately understood. A six-year field study was conducted on hillslope farmland the Sichuan basin, China, to evaluate how honeysuckle planting application affect properties. Various parameters related (soil organic matter (SOM), aggregate stability, bulk de...

During a rainfall water infiltration into an unsaturated soil, zones of saturation may be developed anywhere within the flow domain. Consequently, a natural question arises: under which conditions depending on the rate at which rain water is supplied, the initial moisture distribution in the soil, the presence of underground sources and the boundary permeability, the flow domain may be separate...

Abstract. Soil hydraulic and hydrodispersive properties are necessary for modeling water solute fluxes in agricultural environmental systems. Despite the major efforts developing methods (e.g., laboratory-based, pedotransfer functions), their characterization at applicative scales remains an imperative requirement. Accordingly, this paper proposes a noninvasive situ method integrating electroma...

[1] A Eulerian perturbation method is applied to study the influence of medium heterogeneity on nonreactive chemical transport in a saturated, fractured porous medium under steady state flow conditions. A dual-permeability model is used to describe the flow and solute transport in the fractured medium [Gerke and van Genuchten, 1993a, 1993b]. The model involves two overlaying continua at the mac...

Understanding light nonaqueous-phase liquid (LNAPL) movement in heterogeneous vadose environments is important for effective remediation design. We investigated LNAPL movement near a sloping fineover coarse-grained textural interface, forming a capillary barrier. LNAPL flow experiments were performed in a glass chamber (50 cm 3 60 cm 3 1.0 cm) using two silica sands (12/20 and 30/40 sieve sizes...

The unsaturated soil hydraulic properties, including soil water retention curve and hydraulic conductivity, are the crucial input parameters for simulating soil water and solute transport through the unsaturated zone at regional scales, and are expensive to measure. These properties are frequently predicted with pedotransfer functions (PTFs) using the routinely measured soil properties. 110 soi...