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Model of Salt Flow in Soil with a Source‐sink Term
Author(s) -
Melamed D.,
Hanks R. J.,
Willardson L. S.
Publication year - 1977
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/sssaj1977.03615995004100010013x
Subject(s) - sink (geography) , environmental science , soil science , soil water , salinity , dryland salinity , leaching model , hydrology (agriculture) , soil salinity , dns root zone , geology , geotechnical engineering , soil organic matter , soil biodiversity , oceanography , cartography , geography
Irrigation management practices require a knowledge of the salinity in the root zone. Models which simulate the simultaneous movement of water and soils, but ignore the buffering property of the soil fall to predict the root zone salinity distribution in many field situations. The present work develops a model that takes into consideration source and sink processes and tests it under laboratory and field situations. In determining a “source‐sink” term to be included in the model, it was assumed that precipitation and dissolution were the most important source processes and that the rate of the processes was a function of the surrounding concentration. The parameters for the “sink‐source” term for soil columns were determined from effluent data, and were found suitable for predicting the salinity of the entire soil column. Under field conditions, individual parameters for each layer were needed for good prediction.