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DAPPLE

DAPPLE. D ispersion of A ir P ollutants and their P enetration into the L ocal E nvironment. EPSRC Infrastructure and Environment Programme. The DAPPLE Consortium. Background Objectives Plans Facilities Activities Involvement. The consortium. University of Surrey, Alan Robins

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DAPPLE

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  1. DAPPLE Dispersion of Air Pollutants and their Penetrationinto the Local Environment EPSRC Infrastructure and Environment Programme The DAPPLE Consortium

  2. Background • Objectives • Plans • Facilities • Activities • Involvement

  3. The consortium • University of Surrey, Alan Robins • Imperial College, Roy Colvile • University of Bristol, Dudley Shallcross • University of Cambridge, Rex Britter • University of Leeds, Margaret Bell • University of Reading, Stephen Belcher

  4. “… We do not yet have the understanding needed to answer fundamental questions about pollution behaviour over short distances in the urban environment. …” • DAPPLE • response to research needs identified by APRIL • development from previous collaborative work • timely - capabilities are in place and ready to be exploited • relevant - strong support in London (APRIL, EA, Local Government), plus Met. Office, HSE, DSTL (Porton) etc.

  5. In an urban setting: • To what pollution levels are individuals exposed and what controls this? • What determines the relationship between emissions and exposure? • What are the causes of variability in mean and individual dose rates? • How do we best go about improving local urban air quality? • How do pollutants move in and over a street network? • What tools are needed to deal with these matters? • How should these be developed for incident management?

  6. Short range dispersion in street networks. • Transport above and below roof level. • Mean and turbulent fluxes - their relative roles in pollutant transfer • Emissions modelling • Tracer experiments • Individual dose measurement • Air quality monitoring • Wind tunnel studies • Model evaluation and development

  7. Key dates 2002 April - project start Planning, team development, etc. 2003 Spring - initial field trial Tracer studies: 28 April - 23 May Monitoring studies: April - December Summer - interim results, workshop 2003 Autumn - main field trial 2004 Spring - main field trial (alternative schedule) 2005 Interim results, workshop 2006 March - project end, final report and workshops

  8. Field site Marylebone Road, Gloucester Place intersection

  9. Meteorology 4 - 10 ultra-sonic anemometers 8 automatic weather stations Met Office - forecasts, data, trajectories Main instrumentation Tracer studies emission system - SF6, PMCH 10 x 10 bag sampling systems (20s - 30mins filling time) Monitoring SCOOT data 8 - 12 CO street boxes Marylebone Road ‘super-site’ Instrumented vehicle(s) Personal CO & particle exposure Westminster CC OPSIS

  10. Wind tunnel activities • Field study simulations • Field site modelling sensitivity studies • Generic studies • Wind and turbulence field mapping • Dispersion measurements for point and line sources • Flux and fluctuation measurements • Data set generation for model evaluation

  11. ‘Simple’ model 1:200 in w/t

  12. Computer modelling • Simulations of field and wind tunnel experiments • Evaluation of model performance - sensitivity studies - best practice • Application of science -model developments • Generic studies - means, fluctuations and fluxes - physical processes, exchange mechanisms Dispersion ESUDM -> UDM -> ADMS -> Urban Canopy -> CFD -> LES Emissions Exposure

  13. Participation • Third party involvement through: • Member PAG - Project advisory group • Member ASG - Applications sub-group • Associated experimental studies • Associated or independent modelling studies • PhD projects • Independent data user • supported by: • early provision of data • early knowledge transfer through workshops & seminars • establishment of full data base of project outputs

  14. Contacts • University of Surrey • Alan Robins a.robins@surrey.ac.uk • Imperial College • Roy Colvile r.colvile@ic.ac.uk • Sam Arnold s.arnold@imperial.ac.uk • Surbjit Kaur surbjit.kaur1@ic.ac.uk

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