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Effective roughness modelling as a tool for soil moisture retrieval from C-and L-band SAR

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dc.contributor.authorLievens, Hans
dc.contributor.authorVerhoest, Niko E. C.
dc.contributor.authorKeyser, E. de
dc.contributor.authorVernieuwe, Hilde
dc.contributor.authorMatgen, P.
dc.contributor.authorÁlvarez Mozos, Jesús
dc.contributor.authorBaets, Bernard de
dc.contributor.departmentProyectos e Ingeniería Rurales_ES
dc.contributor.departmentLanda Ingeniaritza eta Proiektuakeu
dc.date.accessioned2014-06-04T11:15:14Z
dc.date.available2014-06-04T11:15:14Z
dc.date.issued2011
dc.description.abstractSoil moisture retrieval from Synthetic Aperture Radar (SAR) using state-of-the-art backscatter models is not fully operational at present, mainly due to difficulties involved in the parameterisation of soil surface roughness. Recently, increasing interest has been drawn to the use of calibrated or effective roughness parameters, as they circumvent issues known to the parameterisation of field-measured roughness. This paper analyses effective roughness parameters derived from C- and L-band SAR observations over a large number of agricultural seedbed sites in Europe. It shows that parameters may largely differ between SAR acquisitions, as they are related to the observed backscatter coefficients and variations in the local incidence angle. Therefore, a statistical model is developed that allows for estimating effective roughness parameters from microwave backscatter observations. Subsequently, these parameters can be propagated through the Integral Equation Model (IEM) for soil moisture retrieval. It is shown that fairly accurate soil moisture results are obtained both at C-and L-band, with an RMSE ranging between 4 vol% and 6.5 vol%.en
dc.description.sponsorshipThe research presented in this paper is funded by the Belgian Science Policy Office and the National Research Fund of Luxembourg in the frame of the Stereo II programme –project SR/00/100, and by the Spanish Government’s National Research, Development and Innovation Plan, project CGL2007- 63453/HID.en
dc.format.mimetypeapplication/pdfen
dc.identifier.doi10.5194/hess-15-151-2011
dc.identifier.issn1027-5606 (print)
dc.identifier.issn1812-2116 (electronic)
dc.identifier.other599
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/10725
dc.language.isoengen
dc.publisherCopernicus Publicationsen
dc.relation.ispartofHydrology and Earth System Sciences, 2011, 15(1). Págs. 151-162en
dc.relation.publisherversionhttps://dx.doi.org/10.5194/hess-15-151-2011
dc.rights© Author(s) 2011. CC Attribution 3.0 Licenseen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.subjectSurface scattering modelsen
dc.subjectSynthetic aperture radaren
dc.subjectIntegral equationen
dc.subjectModelen
dc.subjectBare soilsen
dc.subjectBackscatter modelsen
dc.subjectCorrelation lengthen
dc.subjectParameterizationen
dc.subjectCalibrationen
dc.subjectLanden
dc.subjectApplicabilityen
dc.subjectGeologyen
dc.subjectWater resourcesen
dc.titleEffective roughness modelling as a tool for soil moisture retrieval from C-and L-band SARen
dc.typeinfo:eu-repo/semantics/article
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dspace.entity.typePublication
relation.isAuthorOfPublicationf2f80825-fc58-4e45-9814-9eb10b68c4a9
relation.isAuthorOfPublication.latestForDiscoveryf2f80825-fc58-4e45-9814-9eb10b68c4a9

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