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A Quick Method for Estimating Soil Water Diffusivity Functions
Author(s) -
Miller R. D.,
Bresler Eshel
Publication year - 1977
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/sssaj1977.03615995004100050044x
Subject(s) - thermal diffusivity , wetting , infiltration (hvac) , constant (computer programming) , soil science , limit (mathematics) , mathematics , diffusion , mineralogy , hydrology (agriculture) , thermodynamics , environmental science , mathematical analysis , geotechnical engineering , physics , geology , computer science , programming language
Published data for horizontal infiltration into air dry (θ d ) nonsodic stable soil, imply a regression equation D (θ) = 0.001 m 2 exp [8(θ‐θ d )/(θ w ‐θ d )] where the limit of wetting is θ w and m is a constant relating visual position, x f of wetting front at time t, m = x f /( t ) 1/2 . If m isn't constant, D (θ) may not exist.