In: Journal of Hydrology and Hydromechanics, vol. 67, no. 4
Theophilo B. Ottoni Filho - Marlon G. Lopes Alvarez - Marta V. Ottoni - Arthur Bernardo Barbosa Dib Amorim
Detaily:
Rok, strany: 2019, 359 - 371
Jazyk: eng
Kľúčové slová:
Hydraulic conductivity curve; Gardner exponential model; Mualem-van Genuchten model.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
The relative hydraulic conductivity curve Kr(h) = K/Ks is a key variable in soil modeling. This study proposes
a model to represent Kr(h), the so-called Gardner dual (GD) model, which extends the classical Gardner exponential
model to h values greater than ho, the suction value at the inflection point of the Kr(h) curve in the log-log scale. The
goodness of fit of GD using experimental data from UNSODA was compared to that of the MVG [two-parameter (Kro,
L) Mualem-van Genuchten] model and a corresponding modified MVG model (MVGm). In 77 soils without evidence of
macropore flow, GD reduced the RMSE errors by 64% (0.525 to 0.191) and 29% (0.269 to 0.193) in relation to MVG
and MVGm, respectively. In the remaining 76 soils, GD generally was less accurate than MVG and MVGm, since most
of these soils presented evidence of macropore flow (dual permeability). GD has three parameters and two degrees of
freedom, like MVG. Two of them allow the calculation of the macroscopic capillary length, a parameter from the infiltration
literature. The three parameters are highly dependent on the Kr(h) data measurement in a short wet suction range
around ho, which is an experimental advantage.
Ako citovať:
ISO 690:
Filho, T., Alvarez, M., Ottoni, M., Amorim, A. 2019. Extension of the Gardner exponential equation to represent the hydraulic
conductivity curve. In Journal of Hydrology and Hydromechanics, vol. 67, no.4, pp. 359-371. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0015
APA:
Filho, T., Alvarez, M., Ottoni, M., Amorim, A. (2019). Extension of the Gardner exponential equation to represent the hydraulic
conductivity curve. Journal of Hydrology and Hydromechanics, 67(4), 359-371. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0015
O vydaní:
Vydavateľ: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Publikované: 15. 12. 2019