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    Estimation of Hydraulic properties of a sandy soil using ground-based active and passive microwave remote sensing

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    Type
    Article
    Authors
    Jonard, François
    Weihermüller, Lutz
    Schwank, Mike
    Jadoon, Khan
    Vereecken, Harry
    Lambot, Sébastien
    KAUST Department
    Water Desalination and Reuse Research Center (WDRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2015-06
    Permanent link to this record
    http://hdl.handle.net/10754/564177
    
    Metadata
    Show full item record
    Abstract
    In this paper, we experimentally analyzed the feasibility of estimating soil hydraulic properties from 1.4 GHz radiometer and 0.8-2.6 GHz ground-penetrating radar (GPR) data. Radiometer and GPR measurements were performed above a sand box, which was subjected to a series of vertical water content profiles in hydrostatic equilibrium with a water table located at different depths. A coherent radiative transfer model was used to simulate brightness temperatures measured with the radiometer. GPR data were modeled using full-wave layered medium Green's functions and an intrinsic antenna representation. These forward models were inverted to optimally match the corresponding passive and active microwave data. This allowed us to reconstruct the water content profiles, and thereby estimate the sand water retention curve described using the van Genuchten model. Uncertainty of the estimated hydraulic parameters was quantified using the Bayesian-based DREAM algorithm. For both radiometer and GPR methods, the results were in close agreement with in situ time-domain reflectometry (TDR) estimates. Compared with radiometer and TDR, much smaller confidence intervals were obtained for GPR, which was attributed to its relatively large bandwidth of operation, including frequencies smaller than 1.4 GHz. These results offer valuable insights into future potential and emerging challenges in the development of joint analyses of passive and active remote sensing data to retrieve effective soil hydraulic properties.
    Citation
    Jonard, F., Weihermuller, L., Schwank, M., Jadoon, K. Z., Vereecken, H., & Lambot, S. (2015). Estimation of Hydraulic Properties of a Sandy Soil Using Ground-Based Active and Passive Microwave Remote Sensing. IEEE Transactions on Geoscience and Remote Sensing, 53(6), 3095–3109. doi:10.1109/tgrs.2014.2368831
    Sponsors
    This work was supported by the Helmholtz Alliance on "Remote Sensing and Earth System Dynamics" and by the CROPSENSe project funded by the German Federal Ministry of Education and Research (BMBF). The ELBARA-II radiometer was provided by TERENO "Terrestrial Environmental Observatories", also funded by the BMBF.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Geoscience and Remote Sensing
    DOI
    10.1109/TGRS.2014.2368831
    ae974a485f413a2113503eed53cd6c53
    10.1109/TGRS.2014.2368831
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)

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