Impact of allocation factors on spatial disaggregation of road traffic emissions in Megacity Delhi

IF 2.9 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Air Quality Atmosphere and Health Pub Date : 2025-02-15 DOI:10.1007/s11869-025-01706-7

Anurag Swarnkar, Bhola Ram Gurjar, Hemant Kumar Suman

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Abstract

The traffic emissions have intensified with a rapid surge in urbanisation. A comprehensive estimation of these emissions coupled with spatial analysis is imperative for the development of mitigation strategies. This paper presents an approach for spatially disaggregating the on-road emissions based on different allocation factors across the megacity of Delhi at a resolution of 1 km × 1 km. The annual on-road emissions of PM, CO, NO_x, and VOCs for the base year 2018 are estimated as 9.58 Gg, 248.18 Gg, 102 Gg, and 386.92 Gg, respectively. The emissions are spatially distributed based on the three allocation factors: road density, population density and urban area. The results show that the Northeast and Shahdara districts of Delhi are the primary hotspots of all the emissions. Southwest and West Delhi also significantly contribute to annual emissions. The study reveals that the combination of the allocation factors will improve the spatial disaggregation of traffic emissions. The proposed methodology for disaggregating the emissions helps identify the significant emissions hotspots over a geographical region and develop source-specific mitigation strategies to reduce emissions.

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配置因子对特大城市德里道路交通排放空间分解的影响

随着城市化的快速发展，交通排放加剧。对这些排放进行综合估计并进行空间分析，对于制定缓解战略至关重要。本文提出了一种基于德里特大城市不同分配因子的道路排放空间分解方法，分辨率为1公里× 1公里。基准年2018年PM、CO、NOx和VOCs的年道路排放量分别为9.58 Gg、248.18 Gg、102 Gg和386.92 Gg。基于道路密度、人口密度和城市面积这三个配置因子，对城市排放进行了空间分布分析。结果表明，德里的东北部和Shahdara区是所有排放的主要热点。西南和西德里的年排放量也很大。研究表明，配置因子的组合将改善交通排放的空间分解。拟议的排放分类方法有助于确定一个地理区域内的重大排放热点，并制定针对具体来源的缓解战略，以减少排放。

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来源期刊

Air Quality Atmosphere and Health ENVIRONMENTAL SCIENCES-

CiteScore

8.80

自引率

2.00%

发文量

146

审稿时长

>12 weeks

期刊介绍： Air Quality, Atmosphere, and Health is a multidisciplinary journal which, by its very name, illustrates the broad range of work it publishes and which focuses on atmospheric consequences of human activities and their implications for human and ecological health. It offers research papers, critical literature reviews and commentaries, as well as special issues devoted to topical subjects or themes. International in scope, the journal presents papers that inform and stimulate a global readership, as the topic addressed are global in their import. Consequently, we do not encourage submission of papers involving local data that relate to local problems. Unless they demonstrate wide applicability, these are better submitted to national or regional journals. Air Quality, Atmosphere & Health addresses such topics as acid precipitation; airborne particulate matter; air quality monitoring and management; exposure assessment; risk assessment; indoor air quality; atmospheric chemistry; atmospheric modeling and prediction; air pollution climatology; climate change and air quality; air pollution measurement; atmospheric impact assessment; forest-fire emissions; atmospheric science; greenhouse gases; health and ecological effects; clean air technology; regional and global change and satellite measurements. This journal benefits a diverse audience of researchers, public health officials and policy makers addressing problems that call for solutions based in evidence from atmospheric and exposure assessment scientists, epidemiologists, and risk assessors. Publication in the journal affords the opportunity to reach beyond defined disciplinary niches to this broader readership.