Study on the diffusion simulation of ship SO2 emissions in port areas
Exhaust gas emission from ships is an important factor affecting the air quality of ports.The paper explored the quantitative relationship between ship speed and ship pollutant emissions based on ship AIS data;the AERMOD model was used to study the influence of external wind speed and wind direction on the diffusion of ship pollutants,combined with the characteristics of ship emissions and meteorological conditions during ship navigation.The influences of overlapping emissions from multiple vessels on dispersion outcomes across different spatial and temporal dimensions have been explored,which providing theoretical support for controlling the impact of exhaust emissions from port vessels on the port area environment.Research findings indicate that during vessel navigation,the emission of pollutants is proportional to the square of the vessel speed;the environmental impact of pollutant dispersion decreases with increasing wind speed while the affected area expands.Additionally,considering the overlapping emissions from multiple vessels within port areas,pollutant concentration levels will exceed the impact threshold of a single vessel,leading to more severe environmental consequences.
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