Use of genetic programming based surrogate models to simulate complex geochemical transport processes in contaminated mine sites

Esfahani, Hamed Koohpayehzadeh, and Datta, Bithin (2015) Use of genetic programming based surrogate models to simulate complex geochemical transport processes in contaminated mine sites. In: Gandomi, Amir H., Alavi, Amir H., and Ryan, Conor, (eds.) Handbook of Genetic Programming Applications. Springer, New York, NY, USA, pp. 359-379.

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Abstract

Reactive transport of chemical species in contaminated groundwater systems, especially with multiple species, is a complex and highly non-linear geochemical process. Simulation of such complex geochemical processes using efficient numerical models is generally computationally intensive. In order to increase the model reliability for real field data, uncertainties in hydrogeological parameters and boundary conditions are needed to be considered as well. The development and performance evaluation of ensemble Genetic Programming (GP) models to serve as computationally efficient approximate simulators of complex groundwater contaminant transport process with reactive chemical species under aquifer parameters uncertainties are presented. The GP models are developed by training and testing of the models using sets of random input contaminated sources and the corresponding aquifer responses in terms of resulting spatio-temporal concentrations of the contaminants obtained as solution of the hydrogeological and geochemical numerical simulation model. Three dimensional transient flow and reactive contaminant transport process is considered. Performance evaluation of the ensemble GP models as surrogate models for the reactive species transport in groundwater demonstrates the feasibility of its use and the associated computational advantages. The evaluation results show that it is feasible to use ensemble GP models as approximate simulators of complex hydrogeologic and geochemical processes in a contaminated groundwater aquifer incorporating uncertainties in describing the physical system.

Item ID: 41405
Item Type: Book Chapter (Research - B1)
ISBN: 978-3-319-20883-1
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A version of this publication was included as Chapter 3 of the following PhD thesis: Esfahani, Hamed K. (2016) Development of integrated methodologies for optimal characterization of reactive contaminant sources and monitoring network design in polluted aquifer sites. PhD thesis, James Cook University, which is available Open Access in ResearchOnline@JCU. Please see the Related URLs for access.

Date Deposited: 22 Jan 2016 01:33
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090509 Water Resources Engineering @ 50%
09 ENGINEERING > 0905 Civil Engineering > 090509 Water Resources Engineering @ 50%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 50%
96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 50%
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