DOI: 10.5194/hess-24-4567-2020
论文题名: Technical Note: Improved sampling of behavioral subsurface flow model parameters using active subspaces
作者: Erdal D. ; Cirpka O.A.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 9 起始页码: 4567
结束页码: 4574
语种: 英语
Scopus关键词: Sensitivity analysis
; Well testing
; Behavioral model
; Global sensitivity analysis
; Model calibration
; Model simulation
; Parameter combination
; Sampling efficiency
; Sampling schemes
; Subspace decomposition
; Efficiency
; accuracy assessment
; flow modeling
; parameter estimation
; sampling
; sensitivity analysis
; simulation
; subsurface flow
英文摘要: In global sensitivity analysis and ensemble-based model calibration, it is essential to create a large enough sample of model simulations with different parameters that all yield plausible model results. This can be difficult if a priori plausible parameter combinations frequently yield non-behavioral model results. In a previous study span classCombining double low linecit idCombining double low linexref we developed and tested a parameter-sampling scheme based on active-subspace decomposition. While in principle this scheme worked well, it still implied testing a substantial fraction of parameter combinations that ultimately had to be discarded because of implausible model results. This technical note presents an improved sampling scheme and illustrates its simplicity and efficiency by a small test case. The new sampling scheme can be tuned to either outperform the original implementation by improving the sampling efficiency while maintaining the accuracy of the result or by improving the accuracy of the result while maintaining the sampling efficiency. © 2020 Copernicus GmbH. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162593
Appears in Collections: 气候变化与战略
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作者单位: Erdal, D., Center for Applied Geoscience, University of Tübingen, Hölderlinstr. 12, Tübingen, 72074, Germany, Now At: Tyréns Ab, Lilla Badhusgatan 2, Gothenburg, 41121, Sweden; Cirpka, O.A., Center for Applied Geoscience, University of Tübingen, Hölderlinstr. 12, Tübingen, 72074, Germany
Recommended Citation:
Erdal D.,Cirpka O.A.. Technical Note: Improved sampling of behavioral subsurface flow model parameters using active subspaces[J]. Hydrology and Earth System Sciences,2020-01-01,24(9)