Przeglądaj {{ collection }} wg Autor "Zamani Vahid"

Teraz wyświetlane 1 - 2 z 2

Morphological Investigation of the Urban Form of Qom (Iran) at the Micro-scale: Spatial Distribution of Streets and Activities
(Lodz University of Technology Press, 2023) Zamani Vahid; Mohammadi Mahmoud; Ghalehnoee Mahmoud
Streets function as the interaction space for two systems of movement and activity. Street layout has influence on both distribution pattern of commercial/service (CS) activities and motorized/pedestrian traffic pattern and vice versa. Qom, a city located in central Iran with a long history of civilization, is characterised by a diverse typology of urban form and accordingly, different kinds of movement-activity patterns in the historic, middle and peripheral areas as the result of morphological, economic and social drivers. To take a step towards recognizing the patterns, this paper aims at rigorously explaining the relationship between the structural features of street layout and CS activity presence in Qom at the micro-scale, i.e. street segments, of the centralised zones through adopting a quantitative approach. After identifying ten morphologically-homogenous high-centralised superblocks – called local morphological zones (LMZs) –regarding street network centrality index of local closeness (LCNC) using Multiple Centrality Assessment (MCA), thedistribution of layout/activity elements alongside the street segments (weighted by LCNC) are investigated using Lorenz curve.Then, the distribution density datasets of layout/activity elements are modelled using Kernel Density Estimation (KDE) andanalysed by raster comparison techniques. The findings show that the linear distribution of the CS activities alongside the streetnetwork shows more relationship with LCNC rather than the street nodes. Concerning the areal distribution, the highest spatialcorrelation is found between the street nodes, i.e. three-ways and dead-ends and street segments (weighted by LCNC);furthermore, regarding street pattern, a typical historic fabric of Qom is a high-centralised area characterised by high proportionof three-ways and dead-ends, but, by low proportion of four-ways. The results are applicable in achieving the goals ofcommunity planning.
On the relationship between urban form and amenities: A new perspective from Qom (Iran)
(Lodz University of Technology Press, 2023) Venerandi Alessandro; Zamani Vahid; Porta Sergio
Amenities are fundamental for urban life as they promote socio-economic interactions and enhance city dynamics. Previous studies investigated the relationship between metrics of street network centrality and urban amenities. However, they hardly focused on further aspects of the built environment. A further drawback is that relationships were mainly assessed through linear models even though more complex and non-linear relationships plausibly exist. In this work, we, first, comprehensively describe the urban form of our case study, the city of Qom (Iran), through a set of 55 morphometrics computed at the plot level; second, we investigate the relationship between these metrics and density of amenities, through a set of machine learning techniques that handle non-linear behaviours. The best model explains up to 45% of the variance of the density measure, with coverage ratio, plot size, floor area ratio, street canyon width, and betweenness centrality being the top five explanatory factors. While the findings of this work do not have universal value, the methodology can be replicated to explore the same research question in different contexts. It can also be used as an evidence-based tool to inform design choices in urban redevelopment affecting the location of amenities in cities.