The Arya-Paris model is an indirect method to estimate the soil water characteristic from particle-size data. The scaling parameter, a, in the original model was assumed constant for all soil textures. In this study, a is defined as a, = (logJV//log«,-), where n, is the number of spherical particles in the ith particle-size fraction (determined by the fraction solid mass, wh and mean particle r...

Abstract. In a recently introduced parameterization for the soil water retention curve (SWRC) with sigmoid wet branch and logarithmic dry branch, matric potential at junction point of (hj) was fitting parameter, while that oven dryness (hd) derived from parameters. The latter is undesirable, especially if reliable data in range are limited. Therefore, an alternative presented which shape parame...

The rapid warming of the Arctic is changing conditions for agricultural activity in southwest Greenland markedly, which necessitates studies physical properties soil resource. Soil water repellency (SWR) a property that changes functional behaviour across soil-specific range water-content (W). Although SWR occurs worldwide, it has not been studied sub-arctic pasture and grass fields. Thus, aim ...

AIM To directly determine the mass of dye retained in teeth following exposure to aqueous solutions of Rhodamine B and to correlate tooth color modifications. MATERIALS AND METHODS Extracted third molars (25) were selected and sectioned at the cementoenamel junction for coronal staining. Pulp tissue was removed and teeth sonicated to remove debris. Teeth were kept in deionized water for 12 ho...

A new mathematical treatment concerning the gradient elution in reversed-phase liquid chromatography when the volume fraction psi of an organic modifier in the water-organic mobile phase varies linearly with time is presented. The experimental ln k versus psi curve, where k is the retention factor under isocratic conditions in a binary mobile phase, is subdivided into a finite number of linear ...

be described adequately by a soil hydraulic model that is a closed-form equation with a certain number of paramParametric pedotransfer functions (PTFs), which predict parameeters, e.g., Brooks and Corey or van Genuchten equation. ters of a model from basic soil properties are useful in deriving continuous functions of soil properties, such as water retention curves. The A parametric approach is...

Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Abstract The soil hydraulic parameters for analyzing soil water...