Quantifying Vadose Zone Flow and Transport Uncertainties Using a Unified, Hierarchical Approach

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The objective of this research is to develop and demonstrate a general approach for modeling flow and transport in the heterogeneous vadose zone. The approach uses similar media scaling, geostatistics, and conditional simulation methods to estimate soil hydraulic parameters at unsampled locations from field-measured water content data and scale-mean hydraulic parameters determined from available site characterization data. Neural network methods are being developed to estimate soil hydraulic parameters from more easily measured physical property data such as bulk density, organic matter content, and percentages of sand, silt, and clay (or particle-size distributions). Field water content distributions are being estimated using … continued below

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Meyer, Philip D.; Murray, Christopher J.; Rockhold, Mark L. & Schaap, Marcel June 1, 2002.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 15 times. More information about this report can be viewed below.

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Description

The objective of this research is to develop and demonstrate a general approach for modeling flow and transport in the heterogeneous vadose zone. The approach uses similar media scaling, geostatistics, and conditional simulation methods to estimate soil hydraulic parameters at unsampled locations from field-measured water content data and scale-mean hydraulic parameters determined from available site characterization data. Neural network methods are being developed to estimate soil hydraulic parameters from more easily measured physical property data such as bulk density, organic matter content, and percentages of sand, silt, and clay (or particle-size distributions). Field water content distributions are being estimated using various geophysical methods including neutron moderation, ground-penetrating radar, and electrical resistance tomography. One of the primary goals of this research is to determine relationships between the type of data used in model parameterization, the quantity of data available, the scale of the measurement, and the uncertainty in predictions of flow and transport using these methods. Evaluation of the relationships between available data, scale, and uncertainty are using data from a large-scale, controlled field experiment.

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  • Other Information: PBD: 1 Jun 2002

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  • June 1, 2002

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 21, 2016, 3:51 p.m.

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Meyer, Philip D.; Murray, Christopher J.; Rockhold, Mark L. & Schaap, Marcel. Quantifying Vadose Zone Flow and Transport Uncertainties Using a Unified, Hierarchical Approach, report, June 1, 2002; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc788027/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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