Temporal Moments for Reactive Transport through Fractured Impermeable/Permeable Formations

Sharma, Pramod Kumar and Sekhar, M and Srivastava, Rajesh and Ojha, CSP (2012) Temporal Moments for Reactive Transport through Fractured Impermeable/Permeable Formations. In: JOURNAL OF HYDROLOGIC ENGINEERING, 17 (12). pp. 1302-1314.

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Abstract

The transport of reactive solutes through fractured porous formations has been analyzed. The transport through the porous block is represented by a general multiprocess nonequilibrium equation (MPNE), which, for the fracture, is represented by an advection-dispersion equation with linear equilibrium sorption and first-order transformation. An implicit finite-difference technique has been used to solve the two coupled equations. The transport characteristics have been analyzed in terms of zeroth, first, and second temporal moments of the solute in the fracture. The solute behavior for fractured impermeable and fractured permeable formations are first compared and the effects of various fracture and matrix transport parameters are analyzed. Subsequently, the transport through a fractured permeable formation is analyzed to ascertain the effect of equilibrium sorption, rate-limited sorption, and the multiprocess nonequilibrium transport process. It was found that the temporal moments were nearly identical for the fractured impermeable and permeable formations when both the diffusion coefficient and the first-order transformation coefficient were relatively large. The multiprocess nonequilibrium model resulted in a smaller mass recovery in the fracture and higher dispersion than the equilibrium and rate-limited sorption models. DOI: 10.1061/(ASCE)HE.19435584.0000586. (C) 2012 American Society of Civil Engineers.

Item Type:	Journal Article
Publication:	JOURNAL OF HYDROLOGIC ENGINEERING
Publisher:	ASCE-AMER SOC CIVIL ENGINEERS
Additional Information:	Copyright for this article belongs to ASCE-AMER SOC CIVIL ENGINEERS,USA
Keywords:	Reactive transport;Fractured porous formation;Temporal moments
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	29 Jan 2013 12:30
Last Modified:	29 Jan 2013 12:30
URI:	http://eprints.iisc.ac.in/id/eprint/45700

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