csh_lecture5_transport

csh_lecture5_transport - CWR 6537 Subsurface Contaminant...

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CWR 6537 Subsurface Contaminant Hydrology Lecture 5 1 SOLUTE TRANSPORT IN POROUS MEDIA: Development of General Transport Equations A. Lecture Goal: Develop general equations for solute transport in porous media by starting with the continuity principle that the time-rate solute mass in a unit volume must be equal to the solute flux divergence (and the rate of changes contributed by all sources and sinks). B. Constituent Distribution in the System: Gas Water Solid NAPL adsorption/desorption precipitation adsorption/desorption volatilization condensation colatilization condensation partitioning dissolution Total solute mass per unit volume element: C m T , [M A L -3 ] (1) where 2 w = volumetric water content; n = porosity; 2 g = (n - 2 w - 2 N ), the gas-filled porosity; C w = solute concentration in water, [M A L -3 ]; C g = solute concentration in gas, [M A L -3 ]; and S = sorbed solute concentration, [M A M -1 ] S N = NAPL saturation [L -3 /L -3 ]. NOTE: We will need to specify all phase partition coefficients (at equilibrium), all phase transfer rate coefficients (for nonequilibrium), and transformation rate coefficients in each phase.
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CWR 6537 Subsurface Contaminant Hydrology Lecture 5 2 C. Solute Fluxes in the System: Total solute flux, J T = sum of all fluxes, [M A L -2 A T -1 ] (2) where the superscript j denotes the transport phase (i.e., w for water; and g for gas) while superscript T denotes total flux, and the subscript p denotes the type of solute transport process causing the flux (i.e., a for advective mass flow, or D for diffusive mass flow).
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This note was uploaded on 09/24/2011 for the course CWR 6537 taught by Professor Jawitz during the Spring '08 term at University of Florida.

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csh_lecture5_transport - CWR 6537 Subsurface Contaminant...

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