François Golay

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https://people.epfl.ch/francois.golay?lang=fr

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The main objective is to make the students understand the importance of the spatial issues in environmental sciences and engineering, for example for mapping and interpolation. Presentation of different concepts and techniques devoted to spatial data.

The course deals with the methods and instruments supporting decision processes in the geographical space. The focus is on multi-criteria decision analysis, with the special requirements carried by space-related scenarios and solutions, and by the participatory processes among numerous stakeholders.

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Publications associées (70)

Urban sustainability assessment in Geneva: Relevance of the local neighbourhood unit

Claudia Rebeca Binder Signer, François Golay, Melissa Pang

The physical characteristics of an urban system are typically heterogeneously expressed, creating distinct neighbourhoods shaped by specific local features. Hence, spatially explicit expression of sustainability across the urban system is expected and should not be ignored. In this paper, we present an empirical study that explicitly accounts for the spatial heterogeneity of local-scale urban form features and the significance of a neighbourhood in the canton of Geneva, Switzerland. Our work first established a typology of urban form features, followed by the definition of local-scale functional neighbourhood boundaries using well-established criteria across the study area. An assessment of the sustainability of the resulting neighbourhoods revealed that significant differences can be observed between the different neighbourhood types across various components of urban sustainability. These results highlight the relevance, and argue for the importance, of incorporating local-scale approaches for more effective urban sustainability assessment to support urban planning and policymaking in the transition towards sustainability.

Sage2022

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Evidence of traffic-generated air pollution in Havana

Alain Clappier, François Golay, Jessie Madrazo Bacallao

In Havana, transport is blamed as a likely source of pollution issues. which is usually supported on arguments referring to a vehicle fleet mainly made of old cars (i.e., most models are American from the 1950s or Russian from the 1980s) with poor technical conditions. Most of the existing studies are based on measurements from passive samplers collected for 24 h, which may not be representative of conditions where pollutant concentrations (particles or gases) fluctuate or are not homogeneous, such as transport-related pollution. The goal of this paper is to explore the transport-generated pollution by examining short-time correlations between traffic flows, pollutant concentrations and meteorological parameters. To do that, statistical relationships among all variables were analyzed, which revealed that PM10, NO2 and SO2 concentration levels are influenced by vehicular traffic, mainly with low-speed winds blowing perpendicular to the street axis. Furthermore, southeast and northeast winds force drag pollution from sources other than traffic. These conclusions depend on the specific conditions of the summer season at the measurement area. A more complete analysis could be conducted when more data becomes available for each season.

CENTRO CIENCIAS ATMOSFERA UNAM2019

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Screening differences between a local inventory and the Emissions Database for Global Atmospheric Research (EDGAR)

Alain Clappier, Heydi Contreras Peraza, François Golay, Jessie Madrazo Bacallao

2018

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