GIS application in building air pollution transmission map from industrial sources in Uong Bi city, Quang Ninh province

Abstract

This study applies Geographic Information Systems (GIS) to develop spatial distribution maps of air pollutants from industrial sources in Uong Bi city, Quang Ninh province. Data were collected from the Continuous Emission Monitoring System (CEMS) at major industrial facilities, including the Uong Bi Thermal Power Plant and Lam Thach Cement Plant, combined with geographic base maps and key environmental indicators such as TSP, SO₂, NO₂, and CO. The Inverse Distance Weighting (IDW) spatial interpolation method is used to construct detailed distribution maps. The results indicate that pollutant concentrations mostly comply with regulatory standards; However, during the dry season and periods of high operational capacity, some indicators, such as SO₂, NO₂, and CO, exceeded permissible thresholds near emission sources. Temperature inversion phenomena further exacerbated pollutant accumulation, impacting public health and the environment. The study recommends improving emission treatment technologies, upgrading dust filtration systems, managing operational capacity according to weather conditions, and enhancing continuous automatic monitoring systems. The findings provide scientific data to support environmental management and emphasize the critical role of GIS in air pollution control and public health protection.