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@ARTICLE{Rahmati:897199,
      author       = {Rahmati, Mehdi and Rezaei, Meisam and Lassabatere, Laurent
                      and Morbidelli, Renato and Vereecken, Harry},
      title        = {{S}implified characteristic time method for accurate
                      estimation of the soil hydraulic parameters from
                      one‐dimensional infiltration experiments},
      journal      = {Vadose zone journal},
      volume       = {20},
      number       = {3},
      issn         = {1539-1663},
      address      = {Hoboken, NJ},
      publisher    = {Wiley},
      reportid     = {FZJ-2021-03666},
      pages        = {1-13},
      year         = {2021},
      abstract     = {Recently, a novel approach with excellent performance based
                      on the concept of the characteristic infiltration time, the
                      characteristic time method (CTM), is proposed to infer soil
                      sorptivity (S) and saturated hydraulic conductivity (Ks)
                      from one-dimensional (1D) cumulative infiltration. The
                      current work provides a simplified version of the CTM,
                      called the SCTM, by eliminating the necessity of the
                      iteration method used in CTM and providing a similar
                      accuracy as the original method when estimating S and Ks. We
                      used both synthetic and experimental data to evaluate SCTM
                      in comparison with the original CTM, as well as Sharma (SH)
                      and curve-fitting methods. In the case of synthetically
                      simulated infiltration experiments, the predicted S and Ks
                      values showed an excellent agreement with their theoretical
                      values, with Nash–Sutcliffe (E) values higher than 0.9 and
                      RMSE values of 0.11 cm h1/2 and 0.35 cm h–1, respectively.
                      In the case of experimental data, the SCTM showed E values
                      larger than 0.73 and RMSE values of 0.64 cm h1/2 and 0.35 cm
                      h–1, respectively. The accuracy and the robustness of SCTM
                      was comparable with the original CTM when applied on
                      synthetic infiltration curves as well as on experimental
                      data. Similar to the original CTM, the simplified approach
                      also does not require the knowledge of the time validity,
                      which is needed when using approaches based on Philip's
                      infiltration theory. The method is applicable to
                      infiltrations with durations from 15 min to 24 h. The
                      supplemental material presents the calculation of S and Ks
                      using SCTM in an Excel spreadsheet.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000652184800001},
      doi          = {10.1002/vzj2.20117},
      url          = {https://juser.fz-juelich.de/record/897199},
}