TY  - JOUR
AU  - Weynants, M.
AU  - Vereecken, H.
AU  - Javaux, M.
TI  - Revisting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model
JO  - Vadose zone journal
VL  - 8
SN  - 1539-1663
CY  - Madison, Wis.
PB  - SSSA
M1  - PreJuSER-3843
SP  - 86 - 95
PY  - 2009
N1  - Record converted from VDB: 12.11.2012
AB  - We revisited the Vereecken database, which has been used to derive pedotransfer functions (PTFs) to estimate the soil hydraulic parameters of Belgian soils. We developed new PTFs based on the Mualem-van Genuchten model, constraining m = 1-1/n and using fewer parameters. The goodness-of-fit was similar to the one originally obtained by Vereecken. We used a one-step procedure that allows direct quantification of the correlation matrix and the uncertainties of the estimated parameter values. The coefficients of the new PTFs were estimated using a global search algorithm and they were validated against independent data. The PTFs have a wider range of applicability since: (i) they allow the use of the closed-form solution of the unsaturated hydraulic conductivity in the Mualem-van Genuchten model; and (ii) they consider the effect of macroporosity. We determined that the hydraulic conductivity measured close to saturation could not be estimated based on the available estimators; however, the hydraulic conductivity in the matrix domain was predicted with high accuracy.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000263915100009
DO  - DOI:10.2136/vzj2008.0062
UR  - https://juser.fz-juelich.de/record/3843
ER  -