hydraulic conductivity


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hy·drau·lic con·duc·tiv·i·ty

ease of pressure filtration of a liquid through a membrane; specifically, Kf = η(Q/A) (δx/δP), where Kf = hydraulic conductivity, η = viscosity of the liquid being filtered, Q/A = volume of liquid filtered per unit time and unit area, and δx/δP = reciprocal of the pressure gradient through the membrane; solute concentrations should be identical on both sides of the membrane. Also applied more loosely to measurements on a total membrane of unknown area and thickness with unmeasured fluid viscosity (K = Q/δP).
References in periodicals archive ?
Penetration resistance (PR) for 0.1--0.2 m and 0.2--0.3 m depth, gravimetric moisture (GM) for all depths, TP for 0.1--0.2 m and 0.2--0.3 m depth, and hydraulic conductivity (K0) all had moderate variability.
macro-pores and hydraulic conductivity) using physical amendments for facilitating salt leaching and thus creating a better condition for establishing salt-tolerant plants (halophytes), which can be used as fodder for livestock.
Effect of conservation agriculture on water holding capacity (WHC), hydraulic conductivity (Kfs) and matric flux potential (Im) of soil in 0-15 cm depth under rice-wheat cropping.
In this study, the hydraulic conductivity tests were performed after drying and wetting of samples to a range of matric suctions between 1 and 60 kPa.
where [K.sub.s] is the saturated hydraulic conductivity. [K.sub.r] (h) is the relative hydraulic conductivity and it is a function of the pressure head which makes the Richards equation highly nonlinear.
Because of the physical characteristics of this soil, it could be said that the flow is applied in piston flow and the other hypotheses suggested by Green-Ampt, so the decrease in the quality of performance from the models is attributed to the use of an altered sample of soil, which could not be the most advisable way to estimate the hydraulic conductivity at saturation in the laboratory for soils with high contents of organic matter, and to the use of equations and a database that also do not contemplate soils with high contents of organic matter.
Benson and Boutwell [18] investigated compaction conditions and scale dependent hydraulic conductivity of compacted clay liners.
Cline, "Effect of soil properties on unsaturated hydraulic conductivity pore- interaction factors," Soil Science Society of America Journal, vol.
All of the studies cited indicated that the negative impacts of K and Mg on the saturated soil hydraulic conductivity place them between the extremes of Na as the worst soil dispersant and calcium (Ca) as the best soil flocculant: Na > K > Mg > Ca.