Assessing the Relative Importance of Spatial Variability in Emissions Versus Landscape Properties in Fate Models for Environmental Exposure Assessment of Chemicals
2012 (English)In: Environmental Modelling and Assessment, ISSN 1420-2026, E-ISSN 1573-2967, Vol. 17, no 6, 577-587 p.Article in journal (Refereed) Published
Multimedia mass balance models differ in their treatment of spatial resolution from single boxes representing an entire region to multiple interconnected boxes with varying landscape properties and emission intensities. Here, model experiments were conducted to determine the relative importance of these two main factors that cause spatial variation in environmental chemical concentrations: spatial patterns in emission intensities and spatial differences in environmental conditions. In the model, experiments emissions were always to the air compartment. It was concluded that variation in emissions is in most cases the dominant source of variation in environmental concentrations. It was found, however, that variability in environmental conditions can strongly influence predicted concentrations in some cases, if the receptor compartments of interest are soil or water-for water concentrations particularly if a chemical has a high octanol-air partition coefficient (K-oa). This information will help to determine the required level of spatial detail that suffices for a specific regulatory purpose.
Place, publisher, year, edition, pages
2012. Vol. 17, no 6, 577-587 p.
Multimedia fate model, Spatial concentration variation, Model resolution, Emissions, POP, SimpleBox
IdentifiersURN: urn:nbn:se:su:diva-83822DOI: 10.1007/s10666-012-9315-5ISI: 000310742100002OAI: oai:DiVA.org:su-83822DiVA: diva2:577106