Effects of dry fractures on matrix diffusion in unsaturated fractured rocks

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Matrix diffusion has been recognized as an important mechanism affecting solute transport through unsaturated fractured rock, where a significant fraction of the fracture network remains relatively dry and inactive in conducting liquid flow. This simulation study shows that dry fractures act as strong diffusion barriers to solute transport when such fractures divide the matrix into discrete blocks. Where fracture surface roughness causes some regions of direct contact between matrix blocks separated by a dry fracture, the contacts of the matrix blocks provide conduits for liquid flow and molecular diffusion across dry fractures. Simulation results indicate that the presence of dry ... continued below

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22 pages

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Seol, Yongkoo; Liu, Hui Hai & Bodvarsson, Gudmundur S. January 16, 2002.

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Description

Matrix diffusion has been recognized as an important mechanism affecting solute transport through unsaturated fractured rock, where a significant fraction of the fracture network remains relatively dry and inactive in conducting liquid flow. This simulation study shows that dry fractures act as strong diffusion barriers to solute transport when such fractures divide the matrix into discrete blocks. Where fracture surface roughness causes some regions of direct contact between matrix blocks separated by a dry fracture, the contacts of the matrix blocks provide conduits for liquid flow and molecular diffusion across dry fractures. Simulation results indicate that the presence of dry fractures and their discontinuities considerably affect solute transport in unsaturated fractured rocks.

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22 pages

Notes

OSTI as DE00793765

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  • Other Information: PBD: 16 Jan 2002

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  • Report No.: LBNL--49437
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/793765 | External Link
  • Office of Scientific & Technical Information Report Number: 793765
  • Archival Resource Key: ark:/67531/metadc737979

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 16, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • April 4, 2016, 6:36 p.m.

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Seol, Yongkoo; Liu, Hui Hai & Bodvarsson, Gudmundur S. Effects of dry fractures on matrix diffusion in unsaturated fractured rocks, report, January 16, 2002; California. (digital.library.unt.edu/ark:/67531/metadc737979/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.