The Influence of Levels of Detail (Lod0-2) and Buffer Sizes on Parameter Effectiveness for Fine Dust Distribution Modelling

Abstract

<p><strong>Abstract.</strong> Building models represented in CityGML Level of Detail 0 to 2 were used to calculate urban morphological parameters to test their effectiveness of correlation with measured total number concentration of fine dust in Berlin. Land use regression modelling as an alternative to physical based models explains the distribution of urban fine and ultrafine particles applying a multi linear regression model. Descriptive parameters are identified by high correlations with measured fine dust values. Here, different height information and geometry representations from LoD0-LoD2 were used to calculate six parameters associated with the ventilation and advection capacity of an urban environment (‘averaged heights of buildings’, ‘height-width ratio’, ‘porosity’, ‘frontal area index’, and ‘building surfaces’ for wall surfaces and for wall and roof surfaces). Parameters were correlated with measurements of the total number concentration of fine dust in the city of Berlin. Initial results show ambivalent correlations for both, different buffer sizes and implementation of the parameters with building representations in different levels of detail.</p>

Application of Improved CFD Modeling for Prediction and Mitigation of Traffic-Related Air Pollution Hotspots in a Realistic Urban Street

“…by Hang et al (2012); Hao et al (2019); Kastner-Klein et al (1997); Lin et al (2019); Tan et al (2019); Wedding et al (1977). In the studies of Ghassoun and Löwner (2017); Löwner and Ghassoun (2018); Shi et al (2018), pollution levels were correlated to urban geometric characteristics -such as average building height, standard deviation of building height, and ratio built to total area -through statistical modeling. Other authors, Gousseau et al (2011);Panagiotou et al (2013); Shalaby et al (2018); Shen et al (2017); Tominaga (2012); Xie and Castro (2009), focused on the influence of urban geometric features (orientation of the street network relative to the prevailing wind and amount of open space between buildings in a street canyon) on wind flow patterns and/or pollution.…”