lecture 4-Darcy's Law

lecture 4-Darcy's Law - DARCYLAW CONCEPTS WHAT FORCE CAUSES...

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DARCY’LAW CONCEPTS
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WHAT FORCE CAUSES WATER TO MOVE IN The spatial change in the energy per unit quantity of water (total water potential) is what causes water to move between points A and B Water moves from regions of higher total water potential to those of lower total water potential in porous media
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WHAT FORCE CAUSES WATER TO MOVE IN If a force (F x ) acts on a unit quantity of water (e.g unit volume, cm 3 ) in the direction X, moving from point A to B, then the work done is given by: F x X = - [ φ A - φ B ], where φ A and φ B are the total water potentials at point A and B, respectively.
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WHAT FORCE CAUSES WATER TO MOVE IN The change in total water potential is work done in moving a unit volume of water molecules a distance X with force F x . Therefore F x = - d φ /dx = i, the force or gradient of total water potential .
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TOTAL POTENTIAL: φ
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lecture 4-Darcy's Law - DARCYLAW CONCEPTS WHAT FORCE CAUSES...

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