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Dust dispersion pathway cross-section Dust dispersion pathway graph

 

AAC% dust rose site plotAAC% dust rose plot

 

Dust dispersion plot for contaminated dustDust dispersion plot

Dust Mapping

At a basic level dust data can be plotted as dust roses (see the DS100 Reporting page), on cross sections or in plan to enable a visual assessment of the changes in dust levels along pathways between source/s and receptor/s. See figure top left for AAC% levels across and beyond quarry workings.

DustScan mapping packages are tailored to meet specific client requirements. Dust data can be integrated with spatial information such as site plans, where AAC%, EAC% and “Impact Risk” dust rose diagrams can be overlaid onto site plans or drawings (see figure middle left). These diagrams are extremely useful when multiple gauges are installed in and around a site. Dust source directions and pathways can be identified and compared with baseline conditions and with conditions in different parts of the site, and resulting from different processes and process locations over time.

Data can also be plotted with respect to different dust properties such as element distribution and source apportionment based on appropriate chemical testing. The figure bottom left shows the proportion of contaminated dust near a landfill cell.

When meteorological data is available it becomes possible to review dust levels for different weather conditions over various periods. This information can then be used to assess the extent of changes in dust levels that may arise as a result of new or proposed industrial activities – hence its value in Environmental Assessments and on-going site management in critical areas.

DustScan are committed to promoting the use of monitoring equipment in dust and air pollution studies to validate theoretical modelling studies. Monitoring allows for actual levels of dust, or concentrations or proportions of specific pollutants, to be measured so that modelling predictions can be evaluated.