ESM222Lab6

ESM222Lab6 - ESM 222 Fate and Transport of Pollutants in...

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1 ESM 222 Fate and Transport of Pollutants in the Environment Lab #6: Advection & Dispersion in Porous Media Due: 05/23/08 Objective: Understand the parameters that control advection and dispersion in a porous medium: ± Permeability ± Porosity ± Pressure (hydraulic gradient) ± Dispersivity Methods: We will work with two test columns, one packed with medium sand and one with coarse sand. These two media have significant differences in porosity and permeability, due to differences in packing. Your group will work with only one of the two columns. You will first measure the height of the water column, from the top of the free water surface (top air-water interface) where we assume the pressure is atmospheric (P = 1 atm) to the bottom of the sand and the porous material holding the sand in place. Water will be continuously added at the top using a hose, to maintain a constant h. ± Determine the hydraulic gradient, h, in m H 2 O, and convert to atm, to get an idea of the pressure you build up
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ESM222Lab6 - ESM 222 Fate and Transport of Pollutants in...

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