Results 21 to 30 of about 965 (177)

Thermo-Hydric Modeling of the Water Retention Curve Based on the Hydric Model of Van Genuchten

Aceh International Journal of Science and Technology, 2023
In this paper, we propose an extension for a model of unsaturated soils developed by Van Genuchten (1980) and obtain a thermos-hydric model to study the influence of temperature on the water retention curve. A brief presentation of the model is described using the independent parameter modeling method.
Belal Tewfik, Ghembaza Moulay Smaine
openaire   +2 more sources

Hydraulic and Physical Properties of Managed and Intact Peatlands: Application of the Van Genuchten‐Mualem Models to Peat Soils [PDF]

Water Resources Research, 2021
AbstractUndisturbed peatlands are effective carbon sinks and provide a variety of ecosystem services. However, anthropogenic disturbances, especially land drainage, strongly alter peat soil properties and jeopardize the benefits of peatlands. The effects of disturbances should therefore be assessed and predicted.
Menberu Meseret, Torabi Haghighi Ali, Ronkanen Anna-Kaisa, Marttila Hannu, Klöve Björn, Menberu Meseret Walle   +5 more
openaire   +3 more sources

Alternative Analytical Expressions for the General van Genuchten–Mualem and van Genuchten–Burdine Hydraulic Conductivity Models

Vadose Zone Journal, 2011
The van Genuchten expressions for the unsaturated soil hydraulic properties, first published in 1980, are used frequently in various vadose zone flow and transport applications assuming a specific relationship between the m and n soil hydraulic ...
Neto, D.D., van Lier, Q.D., van Genuchten, M.T., Reichardt, K., Metselaar, K., Nielsen, D.R.   +5 more
openaire   +2 more sources

Determination of the water diffusivity of horticultural substrates: comparison of different approaches for the one-step outflow data analysis

Journal of Agricultural Engineering, 2014
The improved iterative method for the simultaneous determination of the hydraulic properties of growing media from one-step experiment by Bibbiani, was performed on pure peat, pure pumice, and peat/pumice (1peat:1pumice by volume) mix, and compared with ...
Carlo Bibbiani, Carlo A. Campiotti, Luca Incrocci, Alberto Pardossi   +3 more
doaj   +1 more source

Identifying a parameterisation of the soil water retention curve from on-ground GPR measurements [PDF]

Hydrology and Earth System Sciences, 2013
We show the potential of on-ground Ground-Penetrating Radar (GPR) to identify the parameterisation of the soil water retention curve, i.e. its functional form, with a semi-quantitative analysis based on numerical simulations of the radar signal.
A. Dagenbach, J. S. Buchner, P. Klenk, K. Roth   +3 more
doaj   +1 more source

Spatial Variability of Soil Parameters of the van Genuchten Model at a Regional Scale [PDF]

CLEAN – Soil, Air, Water, 2014
Spatial heterogeneity of soil water retention curves (SWRC) plays an important role in modelling the movement of water and solutes in soils. To characterize the spatial variability of SWRC parameters fitted by the van Genuchten (VG) equation, and then identify factors that closely correlated with the VG parameters, we collected undisturbed and ...
Yunqiang Wang, Ming'an Shao, Xiangwei Han, Zhipeng Liu   +3 more
openaire   +1 more source

Comparison Of Selected Pedotransfer Functions For The Determination Of Soil Water Retention Curves

Slovak Journal of Civil Engineering, 2015
Soil water retention curves were measured using a sandbox and the pressure plate extractor method on undisturbed soil samples from the Borská Lowland. The basic soil properties (e.g. soil texture, dry bulk density) of the samples were determined.
Kupec Michal, Stradiot Peter, Rehák Štefan   +2 more
doaj   +1 more source

Estimativa da porosidade drenável de um solo de várzea a partir da tensão da água no solo Assessment of drainable porosity of a holm soil from soil-water tension

Scientia Agricola, 1995
Um modo alternativo para estimativa da porosidade drenável em função da tensão da água no solo a partir da equação de VAN GENUCHTEN para a curva de retenção, é apresentado e testado para dados obtidos de um solo de várzea ( Gleissolo Eutrófico, textura ...
J.E. Queiroz, D.E. Cruciani, P.L. Libardi   +2 more
doaj   +1 more source

Validation and Modification of the Van Genuchten Model for Eroded Black Soil in Northeastern China [PDF]

Water, 2020
The soil water characteristic curve is highly related to soil physical characteristics, which may be affected by the soil erosion degree. To explore the applicability of the soil moisture characteristic curve model in northeastern China, two erosion degrees, (1) lightly and (2) severely eroded black soil sampled from 15 sites, were collected.
Li, Shuang, Xie, Yun, Xin, Yan, Liu, Gang, Wang, Wenting, Gao, Xiaofei, Zhai, Junrui, Li, Jing   +7 more
openaire   +1 more source

Laboratory Method for Estimating Water Retention Properties of Unsaturated Soil

Walailak Journal of Science and Technology, 2012
Soil hydraulic properties are necessary for modeling water flow and solute transport in the vadose zone. However, direct measurement of these characteristics in field conditions is tedious, time-consuming and expensive. In this study, a laboratory method
Sabri KANZARI, Mohamed HACHICHA, Rachida BOUHLILA   +2 more
doaj   +1 more source