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In-situ estimation of erosion model parameters using an advection-diffusion model and Bayesian inversion
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  • William Connellan Edge,
  • Matthew David Rayson,
  • Nicole L Jones,
  • Gregory N. Ivey
William Connellan Edge
The University of Western Australia

Corresponding Author:[email protected]

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Matthew David Rayson
University of Western Australia
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Nicole L Jones
University of Western Australia
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Gregory N. Ivey
University of Western Australia
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Abstract

We describe a framework for the simultaneous estimation of model parameters in a partial differential equation using sparse observations. Monte Carlo Markov Chain (MCMC) sampling is used in a Bayesian framework to estimate posterior probability distributions for each parameter. We describe the necessary components of this approach and its broad potential for application in models of unsteady processes. The framework is applied to three case studies, of increasing complexity, from the field of cohesive sediment transport. We demonstrate that the framework can be used to recover posterior distributions for all parameters of interest and the results agree well with independent estimates (where available). We also demonstrate how the framework can be used to compare different model parameterizations and provide information on the covariance between model parameters.