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Universal constants for scaling the exponential soil water diffusivity?
Author(s) -
Brutsaert Wilfried
Publication year - 1979
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr015i002p00481
Subject(s) - sorptivity , thermal diffusivity , scaling , exponential function , wetting , soil water , constant (computer programming) , sorption , front (military) , exponential decay , soil science , thermodynamics , mathematics , physics , geometry , mathematical analysis , environmental science , chemistry , adsorption , meteorology , compressive strength , computer science , nuclear physics , programming language
The exponential form of the soil water diffusivity can be scaled either with the wetting front parameter Φ f = x f / t ½ or with the sorptivity A 0 = F / t ½ ; these variables, which arise in the problem of sorption in a dry soil, are x f the distance to the wetting front, t the time, and F the infiltrated water volume. It is shown that the three constants used in this scaling are not independent and that only one constant is needed.