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Nomographic Interpretation of Water Absorption Data in Terms of a Two‐Parametric Diffusivity‐Water Content Function
Author(s) -
Stroosnijder L.,
Bolt G. H.
Publication year - 1974
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1974.03615995003800060015x
Subject(s) - thermal diffusivity , extrapolation , absorption of water , water content , absorption (acoustics) , exponential function , parametric statistics , saturation (graph theory) , function (biology) , thermodynamics , chemistry , mathematics , materials science , statistics , mathematical analysis , physics , geology , optics , geotechnical engineering , combinatorics , evolutionary biology , biology , composite material
An exponential extrapolation of a set of experimentally determined diffusivities, D as a function of water content, θ, into the region near saturation lead to an underestimate of the water absorption. A two‐parametric expression for the diffusivity as a function of θ, as proposed by Ahuja et al. (1972), is used to construct a nomogram. This provides a connection between the standardized D ‐θ relationships according to Ahuja et al. and certain “integral” properties of the absorption wetting front. Good agreement is obtained between experimentally determined diffusivity values and the values derived from the nomographical interpretation of water absorption data. The present approach also lends itself to the construction of families of scaled wetting curves. Thus absorption behavior for different (uniform) initial moisture contents could be predicted adequately.