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A Cumulative Mass Coordinate to Determine Water Profile Changes in Variable Volume Soil
Author(s) -
McGarry D.,
Malafant K. W. J.
Publication year - 1987
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/sssaj1987.03615995005100040002x
Subject(s) - volume (thermodynamics) , soil science , environmental science , soil water , hydrology (agriculture) , variable (mathematics) , mathematics , geology , geotechnical engineering , mathematical analysis , physics , quantum mechanics
A method for calculating changes in soil water of variable volume soil using a cumulative mass coordinate is demonstrated. Water content on a mass basis is plotted against mass per unit area of soil solids rather than against depth, lines are fitted, and changes in soil water in zones of gain or loss are calculated from areas between lines. A second method is presented that assesses the need for the cumulative mass coordinate by demonstrating its relation to profile depth. Application of the methods is demonstrated through a worked example using field data taken from an experiment on a Typic Pellustert (Australia).