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Mathematical Geosciences

, Volume 51, Issue 4, pp 463–484 | Cite as

Bayesian Inversion in Hidden Markov Models with Varying Marginal Proportions

  • Selamawit Serka MojaEmail author
  • Zeytu Gashaw Asfaw
  • Henning Omre
Article
  • 74 Downloads

Abstract

Knowledge of the sub-surface characteristics is crucial in many engineering activities. Sub-surface soil classes must, for example, be predicted from indirect measurements in narrow drill holes and geological experience. In this study, the inversion is made in a Bayesian framework by defining a hidden Markov chain. The likelihood model for the observations is assumed to be in factorial form. The new feature is the specification of the prior Markov model as containing vertical class proportion profiles and one reference class transition matrix. A criterion for selection of the associated non-stationary prior Markov model is introduced, and an algorithm for assessing the set of class transition matrices is defined. The methodology is demonstrated on one synthetic example and on one case study for offshore foundation of windmills. It is concluded that important experience from the geologist can be captured by the new prior model and that the associated posterior model is, therefore, improved.

Keywords

Bayesian analysis Non-stationary prior model Offshore windmills Sub-surface soil classes 

Notes

Acknowledgements

The research is made as a part of Ph.D.-study at School of Mathematical and Statistical Sciences, Hawassa University, Ethiopia. The funding is provided by the Ethiopian Department of Education and the Norwegian Agency for Development Cooperation. Also thanks to Ivan Depina, Sintef, Norway for providing and supporting the real geotechnical data.

Funding

Funding was provided by Ethiopian Department of Education, Ethiopia and Norwegian Agency for Development cooperation, Norway.

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Copyright information

© International Association for Mathematical Geosciences 2018

Authors and Affiliations

  • Selamawit Serka Moja
    • 1
    Email author
  • Zeytu Gashaw Asfaw
    • 1
  • Henning Omre
    • 2
  1. 1.School of Mathematical and Statistical SciencesHawassa UniversityHawassaEthiopia
  2. 2.Department of Mathematical SciencesNTNUTrondheimNorway

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