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Solute transfer and extraction from trickle irrigation source: The effective hemisphere model
Author(s) -
Zemel A.,
BenAsher J.,
Charach Ch.,
Silberbush M.
Publication year - 1987
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr023i011p02091
Subject(s) - drip irrigation , trickle , mechanics , flow (mathematics) , extraction (chemistry) , wetting , environmental science , soil science , materials science , hydrology (agriculture) , thermodynamics , chemistry , irrigation , geotechnical engineering , physics , chromatography , geology , biology , ecology , political science , law
Solute distribution around a trickle source for three‐dimensional steady state flow is studied in terms of an approximate analytic model. Ion and water uptake by the root system are taken into account. Moisture flow and ion concentration profiles are assumed to have hemispherical symmetry. The distributions are nearly constant near the source, with a sudden increase or decrease closer to the wetting front, depending on the ion balance. A simple criterion for the highest allowed concentration is developed. The calculated profiles are compared with the results of field measurements on potassium and nitrate ions.