Abstract: In a open-pit coal mining area of Colombia country, there is a significant impact on the air quality of its population centers due to PM10 and PM2.5 particulate matter emitted by open-pit coal mines; In the present work, the YSU and MYNN2 planetary boundary layer schemes of the WRF model were validated and it was determined how wind dynamics influence the concentration of particulate material that is monitored in the area. Transport routes for particulate matter PM10 and PM2.5 were found in a period of neutral ENSO and the influence of regional and local winds on these routes was estimated. In addition, the behavior of winds at different height levels was analyzed, taking as reference the planetary boundary layer; Finally, during the study period, local- scale wind dynamics patterns were identified that could be implemented to forecast episodes of high concentration of particulate matter in the area. The results showed that on the days of peak concentration of particulate matter PM10 and PM2.5 occurred under conditions of atmospheric stability and slow movement of local air masses, which caused the particulate matter to remain suspended in the atmosphere for a considerable time.

Keywords: wind simulation, WRF, Hysplit,PM10, PM2.5.