Haverkort, Wesley (2025) Modelling Oceanic Transport and Accurate Coastal Deposition of Marine Plastics. Bachelor's Thesis, Computing Science.
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Abstract
Accurate modeling of marine plastic transport near coastlines is essential to understand accumulation in coastal ecosystems. Yet, simulating beaching in Lagrangian ocean models is challenging due to coarse coastline resolution and mismatched velocity grids. Traditional “hard-stop” models cause artificial deposition by instantly beaching particles on contact with land. Slip-based models improve realism but still suffer from grid-induced artifacts. This thesis presents a modular system that separates coastal boundary interaction from beaching criteria, enabling flexible combinations of movement and deposition logic. The framework supports interchangeable boundary interaction models (snap, free-slip, and partial-slip) and beaching mechanisms including velocity-based, distance-based, and a newly proposed dual-condition method. The dual-condition model uses both spatial proximity and time spent nearshore, optionally enhanced by a directional check using a signed distance-to-shore map. Implemented in a real-time C++ simulation along the Norwegian coast with synthetic velocity fields, the system shows that the dual-condition method reduces false beaching significantly compared to simpler models. This modular approach enhances physical realism and allows more reliable evaluation of beaching behavior under varying spatial resolutions.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Kehl, C. and Koellermeier, J. and Careaga Solis, J.C. |
| Degree programme: | Computing Science |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 14 Jul 2025 13:54 |
| Last Modified: | 14 Jul 2025 13:54 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/36141 |
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