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Article: Analysing tension infiltrometer data from sloped surface using two-dimensional approximation

TitleAnalysing tension infiltrometer data from sloped surface using two-dimensional approximation
Authors
Keywords2D Approximation
Hydrus-2D/3D
Initial Water Content
Land Slope
Tension Infiltrometer Data
Issue Date2014
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/4125
Citation
Hydrological Processes, 2014, v. 28 n. 3, p. 744-752 How to Cite?
AbstractTension infiltrometers allow water to infiltrate into the soils at various specified pressure heads. The resulting infiltration rates can then be analysed for soil hydraulic properties by either analytical or inverse numerical methods. Tension infiltrometers however are primarily designed to be deployed on horizontal land surfaces, and their applications have been studied widely using an inverse numerical tool HYDRUS-2D. However, natural landscapes are often nonhorizontal, and infiltration through tension infiltrometers on sloped surfaces is no longer an axisymmetrical two-dimensional (2D) process but a fully three-dimensional (3D) one. In addition, minimal research has examined the effect of simplifying the 3D problem to a 2D one on the hydraulic conductivity estimated using tension infiltrometer data from different land slopes of various soil types. Therefore, in this study, tension infiltrometer data on different slopes have been obtained from a catchment located at National University of Singapore. In addition, tension infiltrometer data of six soil types on different slopes and with different initial water content were simulated using HYDRUS-3D. Combining field measurements, forward and inverse modelling, the influence of applying a 2D approximation on hydraulic property estimations using tension infiltrometer data was examined. The results show that the estimations for soils with high infiltration rates are more sensitive to application of the 2D approximation. The maximum allowable slopes for employing 2D approximation on clayey and sandy soils are 25° and less than 3°, respectively. Furthermore, the maximum allowable slope decreases with decreasing initial water content. © 2012 John Wiley & Sons, Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/180445
ISSN
2015 Impact Factor: 2.768
2015 SCImago Journal Rankings: 1.419
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMeshgi, Aen_US
dc.contributor.authorChui, TFMen_US
dc.date.accessioned2013-01-28T01:37:59Z-
dc.date.available2013-01-28T01:37:59Z-
dc.date.issued2014en_US
dc.identifier.citationHydrological Processes, 2014, v. 28 n. 3, p. 744-752en_US
dc.identifier.issn0885-6087en_US
dc.identifier.urihttp://hdl.handle.net/10722/180445-
dc.description.abstractTension infiltrometers allow water to infiltrate into the soils at various specified pressure heads. The resulting infiltration rates can then be analysed for soil hydraulic properties by either analytical or inverse numerical methods. Tension infiltrometers however are primarily designed to be deployed on horizontal land surfaces, and their applications have been studied widely using an inverse numerical tool HYDRUS-2D. However, natural landscapes are often nonhorizontal, and infiltration through tension infiltrometers on sloped surfaces is no longer an axisymmetrical two-dimensional (2D) process but a fully three-dimensional (3D) one. In addition, minimal research has examined the effect of simplifying the 3D problem to a 2D one on the hydraulic conductivity estimated using tension infiltrometer data from different land slopes of various soil types. Therefore, in this study, tension infiltrometer data on different slopes have been obtained from a catchment located at National University of Singapore. In addition, tension infiltrometer data of six soil types on different slopes and with different initial water content were simulated using HYDRUS-3D. Combining field measurements, forward and inverse modelling, the influence of applying a 2D approximation on hydraulic property estimations using tension infiltrometer data was examined. The results show that the estimations for soils with high infiltration rates are more sensitive to application of the 2D approximation. The maximum allowable slopes for employing 2D approximation on clayey and sandy soils are 25° and less than 3°, respectively. Furthermore, the maximum allowable slope decreases with decreasing initial water content. © 2012 John Wiley & Sons, Ltd.en_US
dc.languageengen_US
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/4125en_US
dc.relation.ispartofHydrological Processesen_US
dc.subject2D Approximationen_US
dc.subjectHydrus-2D/3Den_US
dc.subjectInitial Water Contenten_US
dc.subjectLand Slopeen_US
dc.subjectTension Infiltrometer Dataen_US
dc.titleAnalysing tension infiltrometer data from sloped surface using two-dimensional approximationen_US
dc.typeArticleen_US
dc.identifier.emailChui, TFM: maychui@hku.hken_US
dc.identifier.authorityChui, TFM=rp01696en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1002/hyp.9621en_US
dc.identifier.scopuseid_2-s2.0-84891738550en_US
dc.identifier.hkuros230988-
dc.identifier.spage744-
dc.identifier.epage752-
dc.identifier.isiWOS:000329352400028-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridMeshgi, A=23100498100en_US
dc.identifier.scopusauthoridChui, TFM=55487058400en_US

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