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Flow separation in undisturbed soil using multiple anionic tracers (3) unsteady core scale infiltration experiments.

Abdulkabir, M. O. and Beven, Keith J. and Reeves, A. D. (1996) Flow separation in undisturbed soil using multiple anionic tracers (3) unsteady core scale infiltration experiments. Hydrological Processes, 10 (11). pp. 1467-1482. ISSN 0885-6087

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Abstract

Solute transport through structured, undisturbed soil has been studied in transient, unsaturated experiments using columns from grass and woodland sites on the Lancaster University campus. Three anionic tracers have been used, bromide (Br-) and two fluorinated organic acids (pentraflurobenzoic acid and 2,6-diflurobenzoic acid). The process of displacement of stored water from undisturbed columns was investigated using successive inputs of different tracers under similar antecedent conditions. The results indicated that initial breakthrough was rapid, with a relative concentration of 0.8 being reached between 0.4 and 0.5 pore volumes of discharge. It was found that there was an apparent continued discharge of old water, stored in the column before any additions of tracer, even after the addition of a total of 4.9 and 5.4 pore volumes of water for the grass and woodland columns, respectively. The implications of the results of these tracer studies for modelling solute transport in structured soils are considered.

Item Type: Article
Journal or Publication Title: Hydrological Processes
Uncontrolled Keywords: anionic tracers • soil water • solute transport • dispersion • undisturbed soil columns • infiltration • multicomponent mixing
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21978
Deposited By: ep_ss_importer
Deposited On: 17 Feb 2009 09:19
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:54
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21978

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