Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023894 |
Velocities, Residence Times, Tracer Breakthroughs in a Vegetated Lysimeter: A Multitracer Experiment | |
Benettin, Paolo1; Queloz, Pierre2; Bensimon, Michael3; McDonnell, Jeffrey J.4,5,6; Rinaldo, Andrea1,7 | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:21-33 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; Canada; Peoples R China; England; Italy |
英文摘要 | Flow velocities, residence times, and tracer breakthroughs at the lysimeter scale are affected by matrix properties and preferential flow. Despite their relevance to transport processes, however, the relative timing of preferential flow, and its link to transit times through the soil block, is still poorly described. Here we present and analyze tracer data from a 2.5m(3) vegetated lysimeter experiment where 18mm of isotopically labeled water was added as a pulse and then followed with a series of tracer-free controlled rainfall events for 5months. A solution of two fluorobenzoid acid tracers was also injected and tracked. Time series of soil water samples at three different depths and bottom drainage samples were collected and analyzed. Unlike past lysimeter experiments, a willow tree grown within the lysimeter exerted strong evapotranspiration fluxes. By comparative analysis of soil water and bottom drainage samples, we show the presence of both translatory and preferential flow features reflecting the interplay of slow vertical percolation and fast recharge through macropores. We found that water ponding and evaporating from the top of the lysimeter after irrigation prompted samples to be highly and irregularly fractionated. Comparative analyses of multitracer breakthroughs (adjusted by removing fractionation effects) showed that fluorobenzoid acid tracers reached the bottom of the lysimeter earlier than the isotopes, likely due to the effect of plant uptake. Our results underscore the essential role of models to interpret tracer behavior and, critically, the importance of future experiments aimed at measuring the ages of the water abstracted by vegetation. |
英文关键词 | lysimeter experiment flow and transport tracer isotopes |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500002 |
WOS关键词 | ENVIRONMENTAL ISOTOPE DELTA-O-18 ; STORAGE SELECTION FUNCTIONS ; STABLE-ISOTOPES ; WATER-FLOW ; SOIL ; DISTRIBUTIONS ; CATCHMENT ; TRANSPORT ; HILLSLOPE ; FIELD |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21195 |
专题 | 资源环境科学 |
作者单位 | 1.Ecole Polytech Fed Lausanne, Lab Ecohydrol ENAC IIE ECHO, Lausanne, Switzerland; 2.Inst Terr Engn INSIT, Sch Management & Engn Vaud HEIG VD, Yverdon, Switzerland; 3.Ecole Polytech Fed Lausanne, Cent Environm Lab ENAC IIE CEL, Lausanne, Switzerland; 4.Univ Saskatchewan, Sch Environm & Sustainabil, Global Inst Water Secur, Saskatoon, SK, Canada; 5.Ludong Univ, Sch Resources & Environm Engn, Yantai, Peoples R China; 6.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England; 7.Univ Padua, Dipartimento ICEA, Padua, Italy |
推荐引用方式 GB/T 7714 | Benettin, Paolo,Queloz, Pierre,Bensimon, Michael,et al. Velocities, Residence Times, Tracer Breakthroughs in a Vegetated Lysimeter: A Multitracer Experiment[J]. WATER RESOURCES RESEARCH,2019,55(1):21-33. |
APA | Benettin, Paolo,Queloz, Pierre,Bensimon, Michael,McDonnell, Jeffrey J.,&Rinaldo, Andrea.(2019).Velocities, Residence Times, Tracer Breakthroughs in a Vegetated Lysimeter: A Multitracer Experiment.WATER RESOURCES RESEARCH,55(1),21-33. |
MLA | Benettin, Paolo,et al."Velocities, Residence Times, Tracer Breakthroughs in a Vegetated Lysimeter: A Multitracer Experiment".WATER RESOURCES RESEARCH 55.1(2019):21-33. |
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