The Feasibility of Shallow Time Domain Reflectometry Probes to Describe Solute Transport Through Undisturbed Soil Cores

dc.contributor.author Lee, Jaehoon
dc.contributor.author Horton, Robert
dc.contributor.author Horton, Robert
dc.contributor.author Jaynes, Dan
dc.contributor.department Agronomy
dc.date 2018-01-30T22:46:33.000
dc.date.accessioned 2020-06-29T23:05:08Z
dc.date.available 2020-06-29T23:05:08Z
dc.date.issued 2002-01-01
dc.description.abstract <p>Rapid and nondestructive methods for determining solute transport properties are useful in many soil science applications. Recently, a series of field methods and a time domain reflectometry (TDR) method that could estimate some of the mobile-immobile model (MIM) parameters, immobile water content (θ<sub>im</sub>) and mass exchange coefficient (α), have been reported. The first objective of this study was to determine an additional parameter, dispersion coefficient (<em>D</em> <sub>m</sub>), using the TDR method. The three MIM parameters were estimated from the TDR-measured data, and the estimated parameters were compared with the estimated parameters from the effluent data. The second objective was to determine whether the TDR-determined parameters from the surface 2-cm soil layer could be used to predict effluent breakthrough curves (BTC) at the 20-cm depth. The TDR-determined parameters were used to calculate effluent BTCs using the CXTFIT computer program. Parameters obtained by curve fitting of the three parameters simultaneously using TDR data were not similar to the parameters obtained from the effluent BTCs. The parameter estimations were improved by fixing one or two independently determined parameter(s) before curve fitting for the remaining unknown parameter(s). The calculated BTCs were similar to the observed BTCs with coefficient of determination (<em>r</em> <sup>2</sup>) being 0.99 and root mean square error (RMSE) being 0.036. The TDR data obtained from shallow soil layers were successfully used to describe solute transport through undisturbed soil cores.</p>
dc.description.comments <p>This article is published as Lee, Jaehoon, Robert Horton, and Dan B. Jaynes. "The feasibility of shallow time domain reflectometry probes to describe solute transport through undisturbed soil cores." Soil Science Society of America Journal 66, no. 1 (2002): 53-57. doi:<a href="http://dx.doi.org/10.2136/sssaj2002.5300" target="_blank"> 10.2136/sssaj2002.5300</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/427/
dc.identifier.articleid 1476
dc.identifier.contextkey 11445953
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/427
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4784
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/427/2002_Horton_FeasibilityShallow.pdf|||Sat Jan 15 00:14:02 UTC 2022
dc.source.uri 10.2136/sssaj2002.5300
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Hydrology
dc.subject.disciplines Soil Science
dc.title The Feasibility of Shallow Time Domain Reflectometry Probes to Describe Solute Transport Through Undisturbed Soil Cores
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication d3fb0917-6868-417e-9695-a010896cfafa
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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