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Comments on “Laboratory Tests of a Theory of Fingering During Infiltration into Layered Soils”
Author(s) -
Selker J.S.,
Parlange J.Y.,
Steenhuis T.S.
Publication year - 1991
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/sssaj1991.03615995005500030047x
Subject(s) - citation , agriculture , library science , environmental ethics , philosophy , computer science , archaeology , history
Baker and Hillel (1990) obtained very interesting data on movement of water across an interface of fine over coarser soil. The following presents further interpretation of these data with regard to the physics of fingering and the condition under which wetting front instability occurs. The linear regression of the water entry suction of the sublayer, \l/e (cm) with the median grain particle diameter, d (cm) in Fig. 7 of Baker and Hillel (1990) shows that they are related as t« = 0.437 d[1] where the constant of 0.074 in the original equation of Baker and Hillel (1990) is so small that it may be neglected. This scaling where ̂ is inversely proportional to d in Eq. [1] is in agreement with the scaling theory of similar soils originally proposed by Miller and Miller (1956). Also, based on Miller and Miller scaling, we expect that the finger width, D, is inversely related to medium grain diameter and obeys the relation (Parlange et al., 1990)