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Soil Pore Structural Stability and Irrigation Water Quality: I. Empirical Sodium Stability Model
Author(s) -
Cass A.,
Sumner M. E.
Publication year - 1982
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/sssaj1982.03615995004600030011x
Subject(s) - hydraulic conductivity , conductivity , soil science , stability (learning theory) , irrigation , materials science , soil water , chemistry , environmental science , agronomy , machine learning , biology , computer science
The use of a unique threshold concentration curve as an indication of soil pore structural stability is questionable. Not only is the choice of a particular value of relative hydraulic conductivity arbitrary but, in addition, the threshold concentration curve does not reveal soil resistance to hydraulic conductivity reductions over a range of solution composition or concentration changes. In order to overcome this deficiency an empirical sodium stability model is proposed which expresses the relationship between the slopes of the threshold concentration curves as a function of the degree of hydraulic conductivity reduction. This model provides a means of evaluating both the susceptibility to hydraulic conductivity reductions and the degree of hydraulic conductivity change as the percolate concentration is altered.