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Effect of hydraulic conductivity probability distribution function on simulated solute leaching
Author(s) -
Cooke Richard A.,
Mostaghimi Saied,
Woeste Frank
Publication year - 1995
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143095x131303
Subject(s) - hydraulic conductivity , soil science , leaching (pedology) , conductivity , probability distribution , beta distribution , soil water , gaussian , distribution (mathematics) , environmental science , hydrology (agriculture) , geotechnical engineering , mathematics , geology , chemistry , statistics , mathematical analysis , computational chemistry
In this paper, the effect of fitting several different probability‐distribution functions to hydraulic conductivity or pore‐water velocity values, in the simulation of the movement of a nonreactive solute through the soil, is evaluated. The simulation of solute transport in the soil was found to be sensitive to the distribution fitted to pore‐water velocity. The log‐Gaussian (log‐normal) distribution, though traditionally used, is not necessarily the best distribution for characterizing the spatial variability of saturated hydraulic conductivity, pore‐water velocity, or infiltrability. The upper tails of the simulated relative concentration series are best fitted by beta distributions, regardless of the input distribution used for pore‐water velocity.