Results 31 to 40 of about 3,626 (208)

Opportunism is required to meet software demand [PDF]

open access: yes, 2008
This department is part of a special issue on opportunistic software systems development. The first article, Opportunism Is Required to Meet Software Demand, is written by Michiel van Genuchten.
Genuchten, van, M.J.I.M.   +1 more
core   +1 more source

Estimation of soil water characteristic curve parameters in different models in light soils [PDF]

open access: yesرویکردهای نوین در مهندسی آب و محیط زیست
In addition to soil water content, soil matric potential is also important for plant growth. Soil water characteristic curve (SWCC) or soil moisture characteristic curve describes soil water content and soil matric potential relationship.
jahangeer abedi koupaee   +2 more
doaj   +1 more source

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

open access: yesHydrology 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   +3 more
doaj   +1 more source

Van Genuchten soil hydraulic properties. [PDF]

open access: yes, 2015
aθs, θr: the saturated and residual soil water contents, respectively.bα, n: the shape parameters of the retention and conductivity functions, respectively.cKs: the saturated hydraulic conductivity.Van Genuchten soil hydraulic properties.
Andrew J. Thompson (355529)   +3 more
core   +1 more source

Soil Hydraulic Properties Determined by Inverse Modeling of Drip Infiltrometer Experiments Extended with Pedotransfer Functions

open access: yesVadose Zone Journal, 2019
A transient flow experiment using automated drip infiltrometers (ADIs) was performed on soil columns (about 6 dm) large enough to incorporate macropore flow effects.
Ali Mehmandoost Kotlar   +5 more
doaj   +1 more source

Scheduling irrigation using an approach based on the van Genuchten model [PDF]

open access: yesAgricultural Water Management, 2016
Abstract Crop irrigation which results in high water use efficiencies typically uses science-based irrigation scheduling tools to determine irrigation application timing and quantities. Although a large variety of sensors are available for measuring soil moisture status, there are a few easy-to-use irrigation scheduling tools which provide a yes/no ...
Xi Liang   +3 more
openaire   +1 more source

Parameter estimation of soil water retention curve with Rao-1 algorithm

open access: yesJournal of Agricultural Engineering, 2022
The soil water retention curve (SWRC) has a significant role in determining the unsaturated properties of soil. A stochastic optimization algorithm named Rao-1 algorithm is employed to estimate the parameters of the SWRC model in this paper.
Zhongju Wang, Chao Huang, Long Wang
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

open access: yesScientia 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   +2 more
doaj   +1 more source

Moisture‐dependent anisotropy calculations using the van Genuchten–Mualem model

open access: yesVadose Zone Journal, 2022
Abstract Variable, moisture‐dependent anisotropy in unsaturated media is an effective, large‐scale (macroscopic) flow property that results from media heterogeneities at a smaller scale. This technical note documents the variable moisture‐dependent anisotropy calculations using a script for the power‐averaging tensorial connectivity ...
Amena Mayenna, Raziuddin Khaleel
openaire   +2 more sources

Estimation of van Genuchten Equation Parameters in Laboratory and through Inverse Modeling with Hydrus-1D [PDF]

open access: yes, 2018
Soil water retention curve (SWRC) becomes important because it guides when and how much to irrigate, optimizing the use of water; can be obtained in the field or laboratory, being commonly determined in the laboratory with porous plate apparatus, and the
Thiago Leite de Alencar   +8 more
core   +1 more source

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