Pollutant Source-term Characterization
And Transport Parameter Estimation
With Metamodel-based Methods:
A Chlorinated Solvent Case Study
Author(s)
A. Dan & P. Jamet
Abstract
This article presents an original method for the estimation of pollutant
source-term chemical composition and of the parameters governing their
groundwater transport in a given brownfield site. This method is based on field
data exhaustion (primarily the pollutant mass fractions measured in sampling
points, in groundwater). We develop site-specific metamodels (like kriging and
neural networks)—regression models carried out on sampled data from
simulation model outputs—to extract the functional relation between the
chemical compositions computed with a transport code at monitoring locations
and the source composition. Applying the determined metamodels to new
chemical compositions observed in groundwater samples, we directly estimate
the source composition of the sampled pollution. Thus, it becomes possible to
estimate the pollutant source terms (source chemical composition and past
industrial activities or past uses of the site) that have led to the observed
contamination. We illustrate this method on chemical compositions from sites
polluted by chlorinated solvent. The aim of this research is to determine, by cost
efficient means, the nature and the dynamics of the pollutants involved in a
brownfield site under investigation.
Keywords: pollutant source identification, source-term chemical composition
estimation, transport parameters estimation, metamodel, chlorinated solvents,
kriging, neural networks.
Keywords
pollutant source identification, source-term chemical composition
estimation, transport parameters estimation, metamodel, chlorinated solvents,
kriging, neural networks.
Related Book
Other papers in this volume
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