A Study on analysis of fine particle Distribution in Busan Port Area Using Scanning LiDAR

Busan is Korea's largest port city. Considering the large size of the port, measurement through a single monitoring station has limitations in expressing the spatial distribution of fine particles. In this study, a Scanning LiDAR system was used to overcome the limitations of existing observations. Scanning LiDAR is a remote sensing device that uses a laser as a light source to calculate distance information. It can calculate fine particle mass concentration and distance information through signal analysis of collected light from laser light scattered backward by fine particles. It is possible to observe the fine particle concentration in real-time and continuously for 24 hours at a resolution of 30 m within a radius of 5 km and to check the spatial distribution of particulate matter using this. Scanning LiDAR is located on the rooftop of the 9th Engineering Building, Yongdang Campus, Pukyong National University, Korea (latitude: 35.11, longitude: 129.09, about 10m above ground), and was observed from March 2nd to April 28th, 2022. Residential areas, ports, industrial facilities, etc., are included in the observation range, and the average fine particle concentration by area was obtained by dividing it into six areas. ( (A) residential area, (B) steel mill, (C) Gamman Port, (D) redevelopment area, (E) shipyard, (F) berth ). Areas A, B, and C are located to the northeast of the port area, while Areas D, E, and F are located to the west and southwest. As a result of observation, the average concentration of PM2.5 and PM10 in the A, B, and C areas tended to be higher than those in D, E, and F. In the case of Area A, despite being residential, it has a high average concentration. This is because the fine particle is emitted from Area C, where ships and loading equipment are located, and Area B, where steel mills are located. This can be attributed to the diffusion and movement of fine particles discharged from the port area to the downwind side due to the influence of the south wind series, which is the main wind during the observation period.

Acknowledgement

This work was supported by the "Graduate school of Particulate matter specialization"of Korea Environment Industry & Technology Institute grant funded by the Ministry of Environment, Republic of Korea.