Fig. 1. Flowchart of urban wind environment simulation

Fig. 2. Overview of the study area in Zhenzhou

Fig. 3. Average wind speed variation of Zhengzhou meteorological station from 1971 to 2018

Fig. 4. Annual wind speed and direction composite flow chart in Zhengzhou central area

Fig. 5. Wind speed and direction composite flow chart in summer in Zhengzhou central area

Fig. 6. Wind speed and direction composite flow chart in winter in Zhengzhou central area

Fig. 7. Building height in Zhengzhou central area

Fig. 8. Building density in Zhengzhou central area

Fig. 9. Surface roughness distribution in Zhengzhou central area

Fig. 10. Potential ventilation corridors in Zhengzhou central area

Fig. 11. The least cost path under the action of northeast wind in Zhengzhou central area

Fig. 12. The least cost path under the action of southeast wind in Zhengzhou central area

Fig. 13. The least cost path under the action of east wind in Zhengzhou central area