Dispersion of Air Pollution & Penetration into the Local Environment

DAPPLE-EPSRC (2002-2006)

DAPPLE-EPSRC was a 4-year consortium research project (2/05/02 to 04/07/06) funded by the UK EPSRC Engineering for Health, Infrastructure and Environment Programme. The project brought together multidisciplinary expertise from six universities capable of undertaking fieldwork, wind tunnel and computational simulations in order to provide a better understanding of the physical processes affecting street and neighbourhood scale flows of air, traffic and people, and their corresponding interactions with the dispersion of pollutants. The project treated, amongst other things, the causes of peak exposure to air pollutants and the actions that might be taken to alleviate such exposure. The final report to EPSRC can be seen here, the summary reports from each university here and the project review from EPSRC here.

A list of project publications and conference presentations can be seen here. Further details of DAPPLE outputs can be found on the "Outputs" page.


The proposed programme had seven objectives, which are summarised below (details can be found in the original proposal, linked from this page).

1. Conduct tracer dispersion measurements in the field and laboratory, and use them to identify and characterise exposure pathways.

2. Analyse flow and turbulence measurements from the field and laboratory to assess the dispersion capability of the urban infrastructure.

3. Observe vehicle movement in the field and undertake micro-simulations to derive a high resolution local emissions inventory.

4. Use pollutant mapping and CFD modelling to rank sources of spatial and temporal variability in air quality.

5. Assess the representativeness of the DAPPLE case study periods and hence evaluate the generic significance of the data gathered.

6. Measure and analyse individual human exposure to pollutants in the study area and establish future requirements of operational modelling.

7. Integrate the full extent of DAPPLE research and disseminate results promptly and widely.

The intention was to use the fundamental understanding gained in the evaluation and development of appropriate decision support tools and guidelines for their application and thereby support progress towards the sustainable development of safer, more pleasant cities. As far as possible, DAPPLE deliverables were intended to be of generic value and applicable both within UK urban areas and elsewhere overseas.

The fieldwork was based in the area around the Marylebone Road and Gloucester Place intersection in Central London. The street canyon intersection was of interest as it provided the basic case study to demonstrate key fundamental factors that are applicable in a wide range of urban topologies.

The original case for support for the project (including a technical annex describing the work package methodologies) is available here.

All DAPPLE projects

A list of DAPPLE (EPSRC and HO) project publications and conference presentations can be seen here. Further details of outputs can be found on the "Outputs" page.

Link to the DAPPLE-HO project: DAPPLE-HO

If you need further information or would like to become involved in the development of related project proposals, please contact Alan Robins.