A surrogate based multi-objective management model to control saltwater intrusion in multi-layered coastal aquifer systems

Roy, Dilip Kumar, and Datta, Bithin (2017) A surrogate based multi-objective management model to control saltwater intrusion in multi-layered coastal aquifer systems. Civil Engineering and Environmental Systems, 34 (3-4). pp. 238-263.

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Abstract

Linked simulation-optimisation (S-O) models need to simulate the physical processes either by using a rigorous numerical model, or a trained surrogate model approximating the physical processes. A methodology is proposed to evolve Pareto optimal management strategies for a multi-layered coastal aquifer system using a trained and tested Multivariate Adaptive Regression Spline (MARS) surrogate model linked to a multi-objective saltwater intrusion management model. Performance of the developed methodology is evaluated using an illustrative multi-layered coastal aquifer system. Solution results indicate that MARS is capable of approximately replacing the more rigorous numerical simulation model within the linked S-O model to ensure computational efficiency and feasibility in applying such linked S-O models for coastal aquifer management problems. Furthermore, the ability of MARS to recognise the most relevant input variables in predicting the responses as outputs enables the construction of an efficient and robust surrogate model. Integration of parallel processing capabilities within the optimisation model is shown to improve computational efficiency and feasibly of solving such large scale multi-objective problems. Therefore, the developed methodology utilising the MARS based surrogate model is potentially applicable for developing optimal groundwater extraction strategies for sustainable regional scale management of coastal aquifers.

Item ID: 54348
Item Type: Article (Research - C1)
ISSN: 1029-0249
Keywords: coastal aquifer, surrogate model, linked simulation-optimization, saltwater intrusion, multivariate adaptive regression spline, management model
Copyright Information: © 2018 Informa UK Limited, trading as Taylor & Francis Group.
Date Deposited: 27 Jun 2018 07:37
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090509 Water Resources Engineering @ 100%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 100%
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