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| DOI：10.13522/j.cnki.ggps.2017.11.019 |
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| Numerical Simulation of Pollutant Migration in Fenhe Reservoir Following an Accident Using the MIKE21 Model |
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YANG Chen， XU Mingde， GUO Yuan
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College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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| Abstract: |
| We predicted the potential migration and attenuation of pollutants in Fenhe reservoir following an accident using two-dimensional hydrodynamic and chemical transport models. Taking the leakage of xylene as an example, we simulated its movement under 11 scenarios by considering accident source, contaminant concentration, location of the entry to the reservoir, as well as wind speed. The results showed that initial concentration controlled risk of the contaminant, and the wind speed was the key factor controlling the spread of the plume. Wind direction determined the pathway of the pollutant migration. When the wind speed increased from 1.63 m/s to 3.26 m/s, the diffusive rate and the polluted area increased by 46.5% and 64.2% respectively. At the same wind speed, northwest wind affected diffusive rate more significantly than southwest wind. The amount of water and water velocity also impacted pollutant spreading. The diffusive rate when the pollutant entered the reservoir from the east was greater than those entering the reservoir from the west and north. |
| Key words: reservoir; emergent environmental incident; MIKE21; numerical simulation |
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