Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022800 |
Physical and Chemical Controls on the Simultaneous Occurrence of Young and Old Groundwater Inferred From Multiple Age Tracers | |
Underwood, S. C.1,2; McCallum, J. L.1,2,3; Cook, P. G.2,3; Simmons, C. T.2,3; Dogramaci, S.2,4; Purtschert, R.5; Siade, A. J.1,2,6; Prommer, H.1,2,6 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:9514-9532 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Switzerland |
英文摘要 | Understanding groundwater ages within an aquifer system has the potential to better constrain estimates of groundwater recharge and flow rates and therefore increase the reliability of groundwater models. Groundwater ages are generally interpreted from field-observed environmental tracer concentrations, but in many cases in which multiple groundwater age tracers have been analyzed simultaneously the results show significant disparities among tracer-specific estimated ages. The disparities are generally attributed to physical mixing between waters of different ages. However, especially in the geochemical literature environmental tracer concentrations are often analyzed with simplistic models in which the degree of the simulated mixing might be considered unrealistic for natural heterogeneous geologic media. In this study we use numerical experiments to examine under which physical conditions measured concentrations of selected environmental tracers (CFC-12, Ar-39, and C-14) may return discrepant ages. Our model simulations suggest that matrix diffusion has the greatest potential to cause mixing of different-aged water and to generate age biases between tracers. The multitracer simulations also suggest that there is a limit to the magnitude of the discrepancies that can be attributed to physical processes. When comparing data collected from the Pilbara region of Western Australia with our numerical modeling studies, it was found that a dual-domain mass transfer model was required to explain the field-observed age discrepancies. |
英文关键词 | groundwater age tracers age discrepancies numerical modeling |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400051 |
WOS关键词 | RESIDENCE TIME DISTRIBUTIONS ; LUMPED-PARAMETER MODEL ; DOMAIN MASS-TRANSFER ; ENVIRONMENTAL TRACERS ; REACTIVE TRANSPORT ; MACRODISPERSION EXPERIMENT ; HETEROGENEOUS AQUIFERS ; SPATIAL VARIABILITY ; FRACTURED ROCK ; POROUS-MEDIA |
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/22055 |
专题 | 资源环境科学 |
作者单位 | 1.Univ western Australia, Sch Earth Sci, Crawley, WA, Australia; 2.Flinders Univ S Australia, Natl Ctr Groundwater Res & Training, Adelaide, SA, Australia; 3.Flinders Univ S Australia, Coll Sci & Engn, Adelaide, SA, Australia; 4.Rio Tinto Iron Ore, Perth, WA, Australia; 5.Univ Bern, Phys Inst, Climate & Environm Phys, Bern, Switzerland; 6.CSIRO Land & Water, Floreat, WA, Australia |
推荐引用方式 GB/T 7714 | Underwood, S. C.,McCallum, J. L.,Cook, P. G.,et al. Physical and Chemical Controls on the Simultaneous Occurrence of Young and Old Groundwater Inferred From Multiple Age Tracers[J]. WATER RESOURCES RESEARCH,2018,54(11):9514-9532. |
APA | Underwood, S. C..,McCallum, J. L..,Cook, P. G..,Simmons, C. T..,Dogramaci, S..,...&Prommer, H..(2018).Physical and Chemical Controls on the Simultaneous Occurrence of Young and Old Groundwater Inferred From Multiple Age Tracers.WATER RESOURCES RESEARCH,54(11),9514-9532. |
MLA | Underwood, S. C.,et al."Physical and Chemical Controls on the Simultaneous Occurrence of Young and Old Groundwater Inferred From Multiple Age Tracers".WATER RESOURCES RESEARCH 54.11(2018):9514-9532. |
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