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DOI	10.1016/j.advwatres.2020.103594
	On the multiscale characterization of effective hydraulic conductivity in random heterogeneous media: A historical survey and some new perspectives
	Colecchio I.; Boschan A.; Otero A.D.; Noetinger B.
发表日期	2020
ISSN	0309-1708
卷号	140
英文摘要	In large scale heterogeneous aquifer simulations, determining the appropriate coarsening scale λ to define an effective hydraulic conductivity Keff is a challenging task, that involves a trade-off between accuracy and cost. Efficiently adjusting the scale λ is then key, in particular for uncertainty quantification. In this paper, we obtain improved analytical results for the variance of Keff, valid at any scale, in the context of energy dissipation formulation. Using this formulation, we then derive an efficient Keff numerical estimator, and compare it with those of the potential-flow average and permeameter formulations in 2D, for lognormal and binary media, over a wide range of λ and of heterogeneity. We analyze the probability density function (pdf), mean, and variance, of these estimators, comparing them with the analytical results. In the lognormal case, the pdf's are rather similar for the three estimators, and remain lognormal at all scales. In the binary case, slow convergence to an asymptotic regime is observed close to the percolation threshold. © 2020 Elsevier Ltd
关键词	Aquifers Coarsening Economic and social effects Energy dissipation Hydraulic conductivity Solvents Surveys Analytical results Effective hydraulic conductivities Heterogeneous aquifers Multiscale characterizations Percolation thresholds Probability density function (pdf)Random heterogeneous media Uncertainty quantifications Probability density function aquifer energy dissipation heterogeneous medium historical record hydraulic conductivity probability density function stochasticity uncertainty analysis upscaling
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131804
推荐引用方式 GB/T 7714	Colecchio I.,Boschan A.,Otero A.D.,et al. On the multiscale characterization of effective hydraulic conductivity in random heterogeneous media: A historical survey and some new perspectives[J]. Advances in Water Resources,2020,140.
APA	Colecchio I.,Boschan A.,Otero A.D.,&Noetinger B..(2020).On the multiscale characterization of effective hydraulic conductivity in random heterogeneous media: A historical survey and some new perspectives.,140.
MLA	Colecchio I.,et al."On the multiscale characterization of effective hydraulic conductivity in random heterogeneous media: A historical survey and some new perspectives".140(2020).