Development of efficient mathematical, machine learning, simulation-optimisation and digital twin models for managing saltwater intrusion in Pacific Island coastal aquifers
Sharan, Ashneel Ajinesh (2025) Development of efficient mathematical, machine learning, simulation-optimisation and digital twin models for managing saltwater intrusion in Pacific Island coastal aquifers. PhD thesis, James Cook University.
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Abstract
Ashneel Sharan developed 3D mathematical, machine learning, and digital twin models to manage saltwater intrusion in Pacific Island coastal aquifers. He demonstrated that optimal saltwater intrusion management strategies were effectively devised using advanced mathematical and machine learning approaches.
| Item ID: | 94298 |
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| Item Type: | Thesis (PhD) |
| Keywords: | Pacific Island countries, Aquifers, Simulation-optimization, Challenges, Solutions, Complex aquifer, Heterogeneous, Sensitivity analysis, Groundwater modelling, Coastal aquifer, Hydraulic barriers, Digital twin, Ensemble surrogate model, Pacific Island countries, Saltwater intrusion, SEAWAT, Simulation-optimisation |
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| Copyright Information: | Copyright © 2025 Ashneel Ajinesh Sharan |
| Additional Information: | Seven publications arising from this thesis are stored in ResearchOnline@JCU, at time of processing. Please see the Related URLS. The publications are: [Chapter 2] Sharan, Ashneel, Lal, Alvin, and Datta, Bithin (2021) A review of groundwater sustainability crisis in the Pacific Island countries: challenges and solutions. Journal of Hydrology, 603 (Part D). [Chapter 3] Sharan, Ashneel, Lal, Alvin, and Datta, Bithin (2023) Evaluating the impacts of climate change and water over-abstraction on groundwater resources in Pacific island country of Tonga. Groundwater for Sustainable Development, 20. 100890. [Chapter 4] Sharan, Ashneel, Datta, Bithin, and Lal, Alvin (2023) Integrating numerical modelling and scenario-based sensitivity analysis for saltwater intrusion management: case study of a complex heterogeneous island aquifer system. Environmental Monitoring and Assessment, 195 (5). p. 553. [Chapter 5] Sharan, Ashneel, Datta, Bithin, and Lal, Alvin (2024) Stochastic Application in the Numerical Simulation Model for Groundwater Salinity Management and Decision-Making. In: Ghute, Bhagwan B., and Diwate, Pranaya, (eds.) Geospatial Technologies for Integrated Water Resources Management: Mapping, Modelling, and Decision-Making. GIScience and Geo-environmental Modelling . Springer, Cham, Switzerland, pp. 189-208. [Chapter 6] Sharan, Ashneel, Datta, Bithin, Lal, Alvin, and Kotra, Krishna K. (2024) Management of saltwater intrusion using 3D numerical modelling: a first for Pacific Island country of Vanuatu. Environmental Monitoring and Assessment, 196. 120. [Chapter 7] Sharan, Ashneel, Roy, Dilip Kumar, Datta, Bithin, and Lal, Alvin (2026) A multi-objective simulation-optimisation model for managing saltwater intrusion in a coastal aquifer of the Pacific Island of Vanuatu. Journal of Hydrology, 669. 135128. [Chapter 8] Sharan, Ashneel, Datta, Bithin, Roy, Dilip Kumar, and Lal, Alvin (2025) Conceptual development and implementation of a digital twin model for managing saltwater intrusion of an island coastal aquifer. Environmental Monitoring and Assessment, 197 (10). 1148. |
| Date Deposited: | 15 Oct 2026 02:49 |
| FoR Codes: | 40 ENGINEERING > 4005 Civil engineering > 400513 Water resources engineering @ 50% 37 EARTH SCIENCES > 3707 Hydrology > 370703 Groundwater hydrology @ 50% |
| SEO Codes: | 18 ENVIRONMENTAL MANAGEMENT > 1803 Fresh, ground and surface water systems and management > 180305 Ground water quantification, allocation and impact of depletion @ 40% 18 ENVIRONMENTAL MANAGEMENT > 1803 Fresh, ground and surface water systems and management > 180399 Fresh, ground and surface water systems and management not elsewhere classified @ 30% 18 ENVIRONMENTAL MANAGEMENT > 1802 Coastal and estuarine systems and management > 180201 Assessment and management of coastal and estuarine ecosystems @ 30% |
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