Investigation on air pollution control strategy in Hangzhou for post-G20/pre-Asian-games period (2018–2020)

Özet

For the purpose of offering a detailed atmospheric pollution control strategy to the Hangzhou government tomake the major atmospheric pollutants (SO2,NO2,PM2.5and PM10) meet the environmental regulation aimrequired by the 13th Five Year Plan of Hangzhou, the WRF/CMAQ model is used to simulate the pollution levelover Hangzhou. Observed data fromfive local environmental monitoring stations in the downtown Hangzhouare selected to evaluate the performance of simulation. The indicator factors confirm the accuracy of the WRF/CMAQ modeling system. Results show the local emission sources account for 15.8%, 68.6%, 48.3% and 59.2% ofthe overall SO2,NO2,PM2.5and PM10concentration in 2017, respectively. And the research on the separate localsectors indicates traffic donates 71.6% of local NO2emission while industry contributes 73.8%, 53.2% and56.7% of the total local emission of SO2,PM2.5and PM10, respectively. The more severe pollution during thewintertime was mainly due to low wet deposition, low temperature, low wind speed, prevailing wind direction,the condition of local deciduous plants and urban heat island. If the local traffic and industry are cut down by 6%and 10%, respectively, the air pollution control targets on SO2,NO2,PM2.5and PM10in 2020 can be hit.