Comparison of two atmospheric-dispersion models to assess farm-site exposure to sour-gas processing-plant emissions

  • Scott H
  • Soskolne C
  • Martin S
 et al. 
  • 14

    Readers

    Mendeley users who have this article in their library.
  • 13

    Citations

    Citations of this article.

Abstract

We describe two approaches for exposure assessment that we used in a large-scale retrospective cattle study conducted in Alberta, Canada. Sulfur dioxide (SO2) was the surrogate measure of exposure to a complex mixture of combusted sour-gas emissions. Monthly air pollution dispersion modeling (1985-1994) (based on individual industrial source processing-plant engineering specifications, emission volumes, and meteorologic information) provided exposure isopleths of sulfur dioxide concentration from each of 231 sour-gas processing-plants across the province. In contrast, a simpler measure of proximity to source(s) of varying emission rates was applied in a geographical information system based on simplified pollution decay at increasing distances from each point source. Province-wide (663,000 km2) surface analysis (by exposure-level classification) produced a contingency coefficient of 0.68 between the two exposure estimates. Annual exposure estimates at the 1382 dairy and 5726 beef cow-calf farms studied were highly correlated over the 10-years period (rspearman= 0.82 and 0.83, respectively), while monthly exposure estimates were somewhat less correlated (rspearman= 0.80 and 0.82, respectively) for the two exposure assessment methods. Crude exposure estimates from each method were similar in both direction and magnitude. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Air pollution
  • Atmospheric-dispersion model
  • Environmental epidemiology
  • Exposure assessment
  • Geographical information system
  • Point source emissions

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • H. Morgan Scott

  • Colin L. Soskolne

  • S. Wayne Martin

  • Erik A. Ellehoj

  • Robert W. Coppock

  • Tee L. Guidotti

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free