Unknown
PANGAEA
In:
Supplement to: Weynants, Melanie; Vereecken, Harry; Javaux, Mathieu (2009): Revisiting Vereecken Pedotransfer Functions: Introducing a Closed-Form Hydraulic Model. Vadose Zone Journal, 8(1), 86-95, https://doi.org/10.2136/vzj2008.0062
Publication Date:
2023-05-12
Description:
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.
Type:
Dataset
Format:
application/zip, 108.9 kBytes
Permalink
|
Location |
Call Number |
Expected |
Availability |
