Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030151 |
Consensus equilibrium for subsurface delineation | |
Hyung Jun Yang; Youzuo Lin; Brendt Wohlberg; Daniel M. Tartakovsky | |
2021-10-13 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Heterogeneity and insufficient site characterization limit our knowledge of the subsurface. Inversion techniques, which minimize the mismatch between observations and model predictions, have become an essential tool of subsurface characterization. Most optimization-based approaches fail to incorporate various implicit priors and capture the geological complexity. We overcome these limitations by deploying the plug and play and consensus equilibrium (CE) strategies, which provide a flexible framework for image reconstruction. Our CE methodology for spatial delineation of geologic formations consists of an image denoiser and a variational auto-encoder (deep learning-based emulator). The former ameliorates the reconstruction noise, yielding well-defined geological structures; its mathematical equivalence with the proximal operator allows the deployment of advanced denoisers (e.g., CNN-based denoiser) that do not correspond to a regularization objective. The latter defines a geology prior that imposes a geological constraint, e.g., continuity and shape of geological features, onto the reconstructed image. We conduct a series of numerical experiments dealing with transient two-dimensional flow driven by a pumping well and natural hydraulic head gradient. They demonstrate the CE framework’s ability to delineate, both probabilistically and deterministically, complex subsurface environments with sufficient quality. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
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/339877 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Hyung Jun Yang,Youzuo Lin,Brendt Wohlberg,et al. Consensus equilibrium for subsurface delineation[J]. Water Resources Research,2021. |
APA | Hyung Jun Yang,Youzuo Lin,Brendt Wohlberg,&Daniel M. Tartakovsky.(2021).Consensus equilibrium for subsurface delineation.Water Resources Research. |
MLA | Hyung Jun Yang,et al."Consensus equilibrium for subsurface delineation".Water Resources Research (2021). |
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