Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026958 |
A Particle-Based Conditional Sampling Scheme for the Simulation of Transport in Fractured Rock With Diffusion Into Stagnant Water and Rock Matrix | |
Trinchero, Paolo1; Painter, Scott L.2; Poteri, Antti3; Sanglas, Jordi1; Cvetkovic, Vladimir4; Selroos, Jan-Olof5 | |
2020-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; USA; Finland; Sweden |
英文摘要 | In situ experiments and field-scale characterization studies have pointed out that, in fractured crystalline media, groundwater flow is highly channelized. This implies that, at the scale of a single fracture, only part of the fracture surface area is in contact with flowing water, while the rest of in-plane water is essentially stagnant and can be accessed by solutes via molecular diffusion. Despite their importance for contaminant retention, to date, there are no numerical or analytical approaches that could be used to assess the implication of stagnant water zones on solute transport in realistic large-scale Discrete Fracture Network-based models. Here, we present an efficient and flexible algorithm for the simulation of transport in fractured rock with diffusion into stagnant water and rock matrix. The algorithm is a generalization of a previously developed numerical framework for time domain particle tracking in sparsely fractured rock. The key of the generalization is that total time in fracture (tau (f)) is first evaluated using a Monte Carlo sampling and then a second sampling is performed conditioned on tau (f). The algorithm has been successfully validated against existing independent solutions and the implication of diffusion into stagnant water and secondary diffusion into the matrix has been assessed for a realistic modeling scenario. The results show that, due to diffusion into stagnant water, contaminants are more strongly retarded. This increased retention is more significant for sorbing species, as a larger number of sorption sites is accessible. A high sensitivity to the flowing channel/stagnant water zone geometry has also been observed. Key Points In fractured crystalline rocks flow is highly channelized Diffusion into stagnant water and secondary diffusion into the matrix provide additional retention We present an efficient algorithm for the simulation of transport with diffusion into stagnant water and rock matrix |
英文关键词 | fractured media diffusion into stagnant water time domain particle tracking retention time distribution |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538987800022 |
WOS关键词 | RADIONUCLIDE TRANSPORT ; HYDRODYNAMIC TRANSPORT ; CONTAMINANT TRANSPORT ; POROUS-MEDIA ; FLOW ; SOLUTE ; MODEL |
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/280609 |
专题 | 资源环境科学 |
作者单位 | 1.AMPHOS 21 Consulting SL, Barcelona, Spain; 2.Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA; 3.Posiva Oy, Olkiluoto, Eurajoki, Finland; 4.KTH Royal Inst Technol, Land & Water Resources Engn, Stockholm, Sweden; 5.Swedish Nucl Fuel & Waste Management Co, Solna, Sweden |
推荐引用方式 GB/T 7714 | Trinchero, Paolo,Painter, Scott L.,Poteri, Antti,et al. A Particle-Based Conditional Sampling Scheme for the Simulation of Transport in Fractured Rock With Diffusion Into Stagnant Water and Rock Matrix[J]. WATER RESOURCES RESEARCH,2020,56(4). |
APA | Trinchero, Paolo,Painter, Scott L.,Poteri, Antti,Sanglas, Jordi,Cvetkovic, Vladimir,&Selroos, Jan-Olof.(2020).A Particle-Based Conditional Sampling Scheme for the Simulation of Transport in Fractured Rock With Diffusion Into Stagnant Water and Rock Matrix.WATER RESOURCES RESEARCH,56(4). |
MLA | Trinchero, Paolo,et al."A Particle-Based Conditional Sampling Scheme for the Simulation of Transport in Fractured Rock With Diffusion Into Stagnant Water and Rock Matrix".WATER RESOURCES RESEARCH 56.4(2020). |
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