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Permeability Permeability is defined as the property of a porous material which permits the passage or seepage of water (or other fluids) through its interconnecting voids. A material having continuous voids is called permeable. Gravels are high permeability while stiff clay is the least permeable, and hence such a clay may be termed impermeable for all practical purposes. The flow of ... Read More »

Factors Affecting Permeability

Factors Affecting Permeability The Poiseuillc’s law adapted for the flow through the soil pores. Comparing it with the Darcy’s. law q = k i A Thus, the factors affecting permeability are:  Grain size  Properties of the pore fluid  Voids ratio of the soil  Structural arrangement of the soil panicle  Entrapped air and for foreign matter Adsorbed water in clayey soils. 1. ... Read More »

Darcy’s Law of Permeability

Darcy’s Law of Permeability The law of flow of water through soil was first studied by Darcy (1856)  who demonstrated experimentally that for laminer flow conditions in a saturated soil, the rate of flow or the discharge per unit lime is proportional to the hydraulic gradient.     q  =   k i A V = q / A = k ... Read More »

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