Fitting water retention data using Excel

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Fitting the nonlinear van Genuchten (1980) equation using Excel Solver
Link to the worksheet: github.com/lea...
van Genuchten, M.T. (1980) A Closed-Form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils. Soil Science Society of America Journal, 44, 892-898.

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20 сен 2024

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Комментарии : 10

@ENG.Kelvinffxgchfhg 19 дней назад

i think theta s will be at around saturation

@abdurrahaman2690 Год назад

thank you.

@روحالقلم-خ3ف 2 года назад

I want to ask you about the possibility of doing this work with six values of Tita and the possibility of doing this work with the rest of the curves like dexter , khlosi, brook and corey

@leaot 2 года назад

See if you can get my eḿail from here: fav.unb.br/institucional/corpo-docente Search "tleao", I might be able to give you some help

@marcelahv2620 3 года назад

I WANT TO MAKE AN IRRIGATION PROCEDURE BASED ON THIS TO MAKE AN HORMESIS CURVE...:( how I get theta? second column

@leaot 3 года назад

theta is the soil volumetric water content, if you get the water retention curve using "pressure plate apparatus" theta is obtained from weighing the undisturbed soil core at each matric potential. You will get gravimetric water contents which can be converted to volumetric water content at the end of the experiment. A good reference is Methods of Soil Analysis - Physical Methods, Soil Science Society of America (Dane and Topp, 2002)

@روحالقلم-خ3ف 2 года назад

I need to contact you, is it possible?

@leaot 2 года назад

You can get my contact here: fav.unb.br/institucional/corpo-docente

@روحالقلم-خ3ف 2 года назад

but i couldn't find you

@leaot 2 года назад

Please search for "leao" as I cannot put my email here @@روحالقلم-خ3ف