Characterizing hydrogeologic heterogeneity using lithologic data

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Description

Large-scale (>1 m) variability in hydraulic conductivity is usually the main influence on field-scale groundwater flow patterns and dispersive transport. Incorporating realistic hydraulic conductivity heterogeneity into flow and transport models is paramount to accurate simulations, particularly for contaminant migration. Sediment lithologic descriptions and geophysical logs typically offer finer spatial resolution, and therefore more potential information about site-scale heterogeneity, than other site characterization data. In this study, a technique for generating a heterogeneous, three- dimensional hydraulic conductivity field from sediment lithologic descriptions is presented. The approach involves creating a three-dimensional, fine-scale representation of mud (silt and clay) percentage using a stratified ... continued below

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43 p.

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Flach, G.; Hamm, LL.L.; Harris, M.K.; Thayer, P.A.; Haselow, J.S. & Smits, A.D. June 13, 1997.

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Description

Large-scale (>1 m) variability in hydraulic conductivity is usually the main influence on field-scale groundwater flow patterns and dispersive transport. Incorporating realistic hydraulic conductivity heterogeneity into flow and transport models is paramount to accurate simulations, particularly for contaminant migration. Sediment lithologic descriptions and geophysical logs typically offer finer spatial resolution, and therefore more potential information about site-scale heterogeneity, than other site characterization data. In this study, a technique for generating a heterogeneous, three- dimensional hydraulic conductivity field from sediment lithologic descriptions is presented. The approach involves creating a three-dimensional, fine-scale representation of mud (silt and clay) percentage using a stratified interpolation algorithm. Mud percentage is then translated into horizontal and vertical conductivity using direct correlations derived from measured data and inverse groundwater flow modeling. Lastly, the fine-scale conductivity fields are averaged to create a coarser grid for use in groundwater flow and transport modeling.

Physical Description

43 p.

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OSTI as DE97053864

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  • Other Information: PBD: 13 Jun 1997

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  • Other: DE97053864
  • Report No.: WSRC-MS--95-0497-Rev.1
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/565245 | External Link
  • Office of Scientific & Technical Information Report Number: 565245
  • Archival Resource Key: ark:/67531/metadc695077

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  • June 13, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 9, 2016, 7:59 p.m.

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Flach, G.; Hamm, LL.L.; Harris, M.K.; Thayer, P.A.; Haselow, J.S. & Smits, A.D. Characterizing hydrogeologic heterogeneity using lithologic data, report, June 13, 1997; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc695077/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.