Bayesian-information-gap decision theory with an application to CO₂ sequestration

Journal Article · 03 September 2015 · Water Resources Research

DOI: https://doi.org/10.1002/2015WR017413 · OSTI ID:1236708

O'Malley, D. ^[1]; Vesselinov, V. V. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Decisions related to subsurface engineering problems such as groundwater management, fossil fuel production, and geologic carbon sequestration are frequently challenging because of an overabundance of uncertainties (related to conceptualizations, parameters, observations, etc.). Because of the importance of these problems to agriculture, energy, and the climate (respectively), good decisions that are scientifically defensible must be made despite the uncertainties. We describe a general approach to making decisions for challenging problems such as these in the presence of severe uncertainties that combines probabilistic and non-probabilistic methods. The approach uses Bayesian sampling to assess parametric uncertainty and Information-Gap Decision Theory (IGDT) to address model inadequacy. The combined approach also resolves an issue that frequently arises when applying Bayesian methods to real-world engineering problems related to the enumeration of possible outcomes. In the case of zero non-probabilistic uncertainty, the method reduces to a Bayesian method. Lastly, to illustrate the approach, we apply it to a site-selection decision for geologic CO₂ sequestration.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1236708
• Report Number(s): LA-UR--15-22958
• Journal Information: Water Resources Research, Journal Name: Water Resources Research Journal Issue: 9 Vol. 51; ISSN 0043-1397
• Publisher: American Geophysical Union (AGU)Copyright Statement
• Country of Publication: United States
• Language: English