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Hydraulic conductivity, symbolically represented as , is a property of vascular plants, soils and rocks, that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. It depends on the intrinsic permeability of the material, the degree of saturation, and on the density and viscosity of the fluid. Saturated hydraulic conductivity, ''Ksat'', describes water movement through saturated media. ==Methods of determination== There are two broad categories of determining hydraulic conductivity: *''Empirical'' approach by which the hydraulic conductivity is correlated to soil properties like pore size and particle size (grain size) distributions, and soil texture *''Experimental'' approach by which the hydraulic conductivity is determined from hydraulic experiments using Darcy's law The experimental approach is broadly classified into: *Laboratory tests using soil samples subjected to hydraulic experiments *''Field tests'' (on site, in situ) that are differentiated into: * *small scale field tests, using observations of the water level in cavities in the soil * *large scale field tests, like pump tests in wells or by observing the functioning of existing horizontal drainage systems. The small scale field tests are further subdivided into: *infiltration tests in cavities ''above'' the water table *slug tests in cavities ''below'' the water table 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hydraulic conductivity」の詳細全文を読む スポンサード リンク
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