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Development and evaluation of a GPU-based coupled three-dimensional hydrodynamic and water quality model
Qiaofeng Ma1, Shuxiu Liang1, Zhaochen Sun1
1State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China.
Marine Pollution Bulletin
|December 29, 2022
Summary
A new graphics processing unit (GPU)-based marine water quality model (GPUOM-WQ) was developed. It accurately simulates pollution and is significantly faster than traditional methods.
Area of Science:
- Marine environmental modeling
- Computational fluid dynamics
- Water quality assessment
Background:
- Marine pollution is a complex issue requiring comprehensive modeling.
- Existing numerical models often face computational limitations.
- Accurate simulation of marine pollution is crucial for effective management.
Purpose of the Study:
- To develop a novel three-dimensional coupled hydrodynamic and water quality numerical model using graphics processing unit (GPU) technology (GPUOM-WQ).
- To incorporate diverse pollution sources including atmospheric deposition, aquaculture wastewater, and oil platform emissions.
- To enhance the efficiency and accuracy of marine pollution simulations.
Main Methods:
- Development of a GPU-based numerical model (GPUOM-WQ).
- Validation using a test case with analytical solutions and a real-world case with measured data.
- Comparison of computational speed against a 64-core central processing unit (CPU) parallel mode.
Main Results:
- The model (GPUOM-WQ) demonstrated high accuracy with a maximum error of 0.9% against analytical solutions.
- Average relative error for five water quality variables across 38 stations and four seasons was 14.63%.
- GPUOM-WQ achieved a 62.48 times acceleration in computation compared to sequential processing and was 3.23 times faster than CPU parallel mode.
Conclusions:
- GPUOM-WQ provides an accurate and efficient method for simulating marine water quality.
- The model enables high-resolution simulation of water quality variations and spatiotemporal distribution.
- This advancement facilitates better understanding and management of marine pollution.
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