A Real-time Simulation Method of Water Quality Simulation Based on General Purpose Computation

China Rural Water and Hydropower ›› 2021 ›› (2) : 24-29.

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Two-dimensional water quality simulation is computationally intensive. How to improve the performance of water quality simulation under the condition of ensuring accuracy is a key problem that must be solved in water quality simulation. To this end, the study of water quality simulation is carried out in terms of performance and accuracy. To improve the water quality simulation performance, only the grids which are within or beside the river are selected for water quality simulation in the basin and the water quality simulation is decomposed into three steps, including water velocity increment calculation, water flow migration calculation and pollutant diffusion simulation. The parallelization algorithm for each step is designed separately to implement general purpose computation. To improve the accuracy of water quality simulation, the concept of stable flow field is introduced to simulate the produce prophase water regime in the basin. By importing a certain amount of upstream flow sequences before the simulation period to the model, the steady flow field is created. Finally, taking the upper reaches of Mudanjiang River as the experimental basin, the pollutant diffusion process is simulated by the two-year sequence data of water flow and COD concentration. It is found that general purpose computation can complete water quality simulation in a few minutes, while traditional water quality simulation takes several hours or even longer. More importantly, the method in this paper is not only fast in operation, but also has the similar accuracy with the traditional water quality simulation. It is possible to simulate the pollutant diffusion process in the basin accurately in real time.

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water quality simulation / general purpose computation / stable flow field

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. A Real-time Simulation Method of Water Quality Simulation Based on General Purpose Computation. China Rural Water and Hydropower. 2021, 0(2): 24-29

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Received	Revised	Published
2020-02-09	2020-10-28	2021-02-15
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2021-03-30

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