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Detailed Reference Information |
Schaefer, C.E., DiCarlo, D.A. and Blunt, M.J. (2000). Experimental measurement of air-water interfacial area during gravity drainage and secondary imbibition in porous media. Water Resources Research 36: doi: 10.1029/2000WR900007. issn: 0043-1397. |
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A new experimental method was developed to determine air-water interfacial area as a function of capillary pressure and water saturation in unsaturated porous media. The surfactant sodium dodecyl benzene sulfonate (SDBS) was used in equilibrium column adsorption experiments to estimate air-water interfacial area for water saturations (milliliter water per milliliter void) ranging from 0.05 to 1.0 and pressures ranging from 0 to 20 cm of water. A comparison was made between columns which were equilibrated under gravity drainage versus columns equilibrated under secondary imbibition. Gravity drainage experiments showed the air-water interfacial area decreased linearly with saturation, while imbibition experiments showed a more complex nonmonotonic relation to the saturation. The interfacial area data are then compared with existing network models. ¿ 2000 American Geophysical Union |
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Abstract |
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Keywords
Hydrology, Groundwater hydrology, Hydrology, Groundwater transport, Hydrology, Unsaturated zone |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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