Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Optimal spatial design for air quality measurement surveys

Abstract : Measurement surveys using passive diffusion tubes are regularly car-ried out to elaborate atmospheric concentration maps over various areas. Sampling schemes must be designed to characterize both contaminant concentrations (of benzene or nitrogen dioxide for example) and their re-lations to environmental variables so as to obtain pollution maps as precise as possible. Here, a spatial statistical methodology to design benzene air concentration measurement surveys on the urban scale is exposed. In a first step, an a priori modeling is conducted that is based on the analysis of data coming from previous campaigns on two different agglomerations. More precisely, we retain a modeling with an external drift which consists of a drift plus a spatially correlated residual. The statistical analysis per-formed on available data leads to choose the most relevant auxiliary vari-ables and to determine an a priori variogram model for the residual. An a priori distribution is also defined for the variogram parameters, whose values appear to vary from a campaign to another. In a second step, we optimize the positioning of the measuring devices on a third agglomera-tion according to a Bayesian criterion. Practically, we aim at finding the design that minimizes the mean over the urban domain of the universal kriging variance, whose parameters are based on the a priori modeling, while accounting for the prior distribution over the variogram parameters. Two global optimization algorithms are compared: simulated annealing and a particle filter based algorithm.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [28 références]  Voir  Masquer  Télécharger

https://hal-mines-paristech.archives-ouvertes.fr/hal-01089309
Contributeur : Thomas Romary <>
Soumis le : mardi 2 décembre 2014 - 16:21:11
Dernière modification le : mercredi 14 octobre 2020 - 04:10:20
Archivage à long terme le : : mardi 3 mars 2015 - 10:11:04

Fichier

paper_environ.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Thomas Romary, Laure Malherbe, Chantal de Fouquet. Optimal spatial design for air quality measurement surveys. Environmetrics, Wiley, 2014, 25, pp.16 - 28. ⟨10.1002/env.2253⟩. ⟨hal-01089309⟩

Partager

Métriques

Consultations de la notice

535

Téléchargements de fichiers

512