“Darcy’s law”的概念、定义、翻译、参考文献-科学参考

Darcy’s law

Geology and Earth Sciences

A description of the relationships among factors that determine groundwater flow, expressed as an equation. At its simplest, Darcy’s law states that Q = kIA, where Q is the ground water flow, k the hydraulic conductivity of the rock, I the hydraulic gradient (i.e. gradient of hydraulic head), and A the cross-sectional area through which flow occurs. The law was formulated in 1856 by the French engineer Henry Philibert Gaspard Darcy (1803–58).

Geography

When the Reynolds number is very low, the velocity of flow of a fluid through a saturated porous medium is directly proportional to the difference in water pressure at the two sites:
$V = \frac{h}{P_{l}}$
where h is the height difference between the highest point of the water-table and the point at which flow is being calculated, V the velocity of flow, P the coefficient of permeability for the medium in question, and l the length of flow. Darcy’s law does not hold good for well-jointed limestone which has numerous channels and fissures. Darcy’s equation can be written in several ways: see GroundwaterSoftwater.com (March 2004). See also Buchan and Cameron in S W. Trimble et al., eds (2003).

单词	Darcy’s law
释义	Darcy’s law Geology and Earth Sciences A description of the relationships among factors that determine groundwater flow, expressed as an equation. At its simplest, Darcy’s law states that Q = kIA, where Q is the ground water flow, k the hydraulic conductivity of the rock, I the hydraulic gradient (i.e. gradient of hydraulic head), and A the cross-sectional area through which flow occurs. The law was formulated in 1856 by the French engineer Henry Philibert Gaspard Darcy (1803–58). Geography When the Reynolds number is very low, the velocity of flow of a fluid through a saturated porous medium is directly proportional to the difference in water pressure at the two sites: $V = \frac{h}{P_{l}}$ where h is the height difference between the highest point of the water-table and the point at which flow is being calculated, V the velocity of flow, P the coefficient of permeability for the medium in question, and l the length of flow. Darcy’s law does not hold good for well-jointed limestone which has numerous channels and fissures. Darcy’s equation can be written in several ways: see GroundwaterSoftwater.com (March 2004). See also Buchan and Cameron in S W. Trimble et al., eds (2003).
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