HIGH-RESOLUTION SPATIAL SOLUTION FOR AIR QUALITY ASSESSMENT IN THE TROPICAL CITY OF HO CHI MINH CITY, VIETNAM

IF 0.9 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Van Tran Thi, Bao Ha Duong Xuan, Bao VO QUOC, Phuong DINH THI KIM, Hieu NGUYEN TRINH DUC
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Abstract

Air pollution is the leading environmental agent that poses a severe threat to human health and is one of the most severe problems in cities. Of the pollutants, particulate matter (PM), especially particles less than 2.5 microns in diameter, has the most profound health impacts. Urbanization and industrialization in cities have made the air quality up there worse and worse. Our study was based on the Aerosol Optical Depth (AOD) feature, a parameter obtained by remote sensing that relates to the presence of airborne particles potentially associated with PM. In this study, the PM2.5 concentration data from the ground monitoring station and the MODIS AOD product of 3 km resolution were correlated to build a suitable regression function to simulate the spatial distribution of PM2.5 concentrations. Next, the AOD was retrieved from the Landsat image based on the characteristics of the decrease in atmospheric clarity caused by the pollution particles. Landsat AOD has a 600m higher resolution than MODIS AOD. Research results on air quality (AQ) were simulated on Landsat AOD image through PM2.5 concentration distribution and air quality index (AQI), in which AQI was determined based on USEPA standards. The analysis shows that the linear regression function between PM2.5 concentration and MODIS AOD correlated best with the correlation coefficient R=0.9. Then PM2.5 distribution was established on Landsat AOD image with higher spatial resolution. Case analysis for March of 2018 reflected that the average concentration of PM2.5 across Ho Chi Minh City (HCMC) was higher than the allowable threshold specified in QCVN05:2013/BTNMT. PM2.5 concentration in central districts tended to be higher than in suburban districts. The study also found that the city average AQI-PM2.5 was around 97.38, peaking at 159, which was in the Unhealthy range, especially for sensitive groups. The result of the study provides potential solutions for AQ monitoring at the city level with a detailed spatial distribution.
越南热带城市胡志明市空气质量评估的高分辨率空间解决方案
空气污染是对人类健康构成严重威胁的主要环境因素,是城市中最严重的问题之一。在污染物中,颗粒物(PM),特别是直径小于2.5微米的颗粒物,对健康的影响最为深远。城市的城市化和工业化使得空气质量越来越差。我们的研究基于气溶胶光学深度(AOD)特征,这是一个通过遥感获得的参数,与可能与PM相关的空气中颗粒的存在有关。本研究将地面监测站PM2.5浓度数据与3 km分辨率MODIS AOD产品进行关联,构建合适的回归函数,模拟PM2.5浓度的空间分布。其次,根据污染颗粒导致大气清晰度下降的特征,从Landsat图像中提取AOD。Landsat AOD的分辨率比MODIS AOD高600m。通过PM2.5浓度分布和空气质量指数(AQI)在Landsat AOD图像上模拟空气质量(AQ)的研究结果,其中空气质量指数(AQI)根据USEPA标准确定。分析表明,PM2.5浓度与MODIS AOD的线性回归函数相关性最好,相关系数R=0.9。然后在更高空间分辨率的Landsat AOD图像上建立PM2.5的分布。2018年3月的案例分析显示,胡志明市(HCMC)的PM2.5平均浓度高于QCVN05:2013/BTNMT规定的允许阈值。中心城区的PM2.5浓度高于郊区。该研究还发现,北京的平均空气质量指数(AQI-PM2.5)约为97.38,峰值为159,处于不健康范围,尤其是对敏感人群而言。研究结果为城市层面的空气质量监测提供了可能的解决方案,并提供了详细的空间分布。
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来源期刊
CiteScore
2.30
自引率
25.00%
发文量
42
审稿时长
12-24 weeks
期刊介绍: The publishing of CARPATHIAN JOURNAL of EARTH and ENVIRONMENTAL SCIENCES has started in 2006. The regularity of this magazine is biannual. The magazine will publish scientific works, in international purposes, in different areas of research, such as : geology, geography, environmental sciences, the environmental pollution and protection, environmental chemistry and physic, environmental biodegradation, climatic exchanges, fighting against natural disasters, protected areas, soil degradation, water quality, water supplies, sustainable development.
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