caa a22 4500 475819551 CHVBK 20180406123819.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1011556701668 doi (NATIONALLICENCE)springer-10.1023/A:1011556701668 Temporal moments analysis of preferential solute transport in soils [Elektronische Daten] [F. Stagnitti, G. Allinson, M. Morita, M. Nishikawa, H. Il, T. Hirata] Temporal moments analysis of solute breakthrough curves is used to investigate the preferential leaching of chloride, nitrate and phosphate through an Australian soil. Recent studies have shown that current models and methods do not adequately describe the leaching of nutrients through soil, often underestimating the risk of groundwater contamination by surface-applied chemicals, and overestimating the concentration of resident solutes. This inaccuracy results primarily from ignoring soil structure and non-equilibrium between soil constituents, water and solutes. Therefore simple models are required to accurately characterise solute transport in natural and agricultural soils under non-equilibrium conditions. A multiple sample percolation system, consisting of 25 individual collection wells was constructed to study the effects of localised soil heterogeneities on the transport of nutrients (NO3 −, Cl−, PO4 3 −) in the vadose zone of an agricultural soil predominantly dominated by clay. Using data collected from the multiple sample percolation experiments, this paper compares and contrasts the performance of temporal moments analysis with two mathematical models for predicting solute transport, the advective-dispersion model with a reaction term (ADR) and a two-region preferential flow model (TRM) suitable for modelling preferential transport. The values for solute transport parameters predicted by temporal moments analysis were in excellent agreement with experimental data and results from ADR and TRM. It is concluded that temporal moments analysis when applied with other physical models such as the ADR and TRM, provide an excellent means of obtaining values for important solute transport parameters and gaining insight of preferential flow. These results have significant ramifications for modelling solute transport and predicting nutrient loadings. Kluwer Academic Publishers, 2000 solute transport nationallicence temporal moments nationallicence nutrients nationallicence nitrate nationallicence chloride nationallicence phosphate nationallicence pollution nationallicence advective-dispersion equation nationallicence mobile-immobile water nationallicence preferential flow nationallicence numerical methods nationallicence Stagnitti F. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut Allinson G. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut Morita M. National Institute for Environmental Science, 16-2 Onogawa, Tsukuba, 305, Ibaraki, Japan aut Nishikawa M. National Institute for Environmental Science, 16-2 Onogawa, Tsukuba, 305, Ibaraki, Japan aut Il H. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut Hirata T. Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, 640, Wakayama-city, Wakayama, Japan aut Environmental Modeling & Assessment Kluwer Academic Publishers 5/4(2000-12-01), 229-236 1420-2026 5:4<229 2000 5 10666 https://doi.org/10.1023/A:1011556701668 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1011556701668 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stagnitti F. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut NATIONALLICENCE 700 1- Allinson G. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut NATIONALLICENCE 700 1- Morita M. National Institute for Environmental Science, 16-2 Onogawa, Tsukuba, 305, Ibaraki, Japan aut NATIONALLICENCE 700 1- Nishikawa M. National Institute for Environmental Science, 16-2 Onogawa, Tsukuba, 305, Ibaraki, Japan aut NATIONALLICENCE 700 1- Il H. School of Ecology and Environment, Deakin University, PO Box 423, 3280, Warrnambool, Australia aut NATIONALLICENCE 700 1- Hirata T. Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, 640, Wakayama-city, Wakayama, Japan aut NATIONALLICENCE 773 0- Environmental Modeling & Assessment Kluwer Academic Publishers 5/4(2000-12-01), 229-236 1420-2026 5:4<229 2000 5 10666 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer