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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},
}