%0 Journal Article
%A Weynants, M.
%A Vereecken, H.
%A Javaux, M.
%T Revisting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model
%J Vadose zone journal
%V 8
%@ 1539-1663
%C Madison, Wis.
%I SSSA
%M PreJuSER-3843
%P 86 - 95
%D 2009
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000263915100009
%R 10.2136/vzj2008.0062
%U https://juser.fz-juelich.de/record/3843