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A spatial-and-temporal-based method for rapid particle concentration estimations in an urban environment

Xiong, J., Yao, R., Wang, W., Yu, W. and Li, B. (2020) A spatial-and-temporal-based method for rapid particle concentration estimations in an urban environment. Journal of Cleaner Production, 256. 120331. ISSN 0959-6526

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To link to this item DOI: 10.1016/j.jclepro.2020.120331

Abstract/Summary

The increasing construction of buildings and infrastructure in cities heavily influences pollutant dispersion and causes a spread of increased particle concentrations. Real-time data and information on local pollution levels are highly desired by residents, urban planners and policy-makers. Such information is scarce due to the high cost of real-time measurement. To fill the gap, the aim of this research is to develop a model that can rapidly estimate particulate pollution based on a data-driven artificial neural network modelling approach. The key influential factors such as background pollution level, weather conditions, urban morphology and local pollution sources are embedded in the model in association with local emission sources of pollution relating to construction activities and traffic flows. The data for urban spatial-variables (building and road) and traffic information is processed with the aid of the Geographic Information System using self-developed Python scripts. The geographic dataset containing the required information for each grid is integrated with the artificial neural network model to perform forecasting of particle concentrations. The model has been verified with measurements from a case study with 20 sample locations in Chongqing, China, showing that the average relative error of particle concentration estimation compared to measurement is 17.56% for PM10 and 16.04% for PM2.5. A map of a time-specific spatial interpolation of particle concentrations which visualises real-time pollution is consequently produced based on the method. The method can be used as a tool for real-time air quality forecasting with suitable adaptations for any other dense urban area with minimum information from local observation stations.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of the Built Environment > Construction Management and Engineering > Innovative and Sustainable Technologies
ID Code:88951
Publisher:Elsevier

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