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An analysis of the leaching of chloride tracer applied to pipe‐drained plots using a coupled unsaturated‐saturated zone model of solute transport
Author(s) -
Vinten A.J.A.,
Vivian B.,
Redman M.H.
Publication year - 1991
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/j.1475-2743.1991.tb00857.x
Subject(s) - vadose zone , loam , tracer , leaching (pedology) , soil science , nitrate , chloride , soil water , dns root zone , lessivage , environmental science , hydrology (agriculture) , geology , chemistry , mineralogy , geotechnical engineering , physics , organic chemistry , nuclear physics
. The modelling of leaching of nitrate and other solutes in artificially drained soils is complicated by the need to consider both unsaturated and saturated components of the system. This work is an attempt to couple together an unsaturated zone transport model (Addiscott & Whitmore, 1991) with a steady state travel‐ time model (Ernst, 1973) for the saturated zone. The model was tested using chloride leaching data from eight hydrologically isolated plots on a pipe‐drained clay loam soil. Approaches to parameter estimation are discussed. Results were variable, for on some plots saturated zone travel time could be virtually neglected, whereas on other plots this component was apparently important.