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University of Surrey
Guildford
Surrey
GU2 7XH

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Emma Hellawell (continued)

Research Contracts and Projects

 

Geoenvironmental

Regenerating the brownfields: the development of methods and procedures for remediating previously used sites

Sponsors: EPSRC and Tony Gee and Partners

EngD Student: Natalie Cropp

A major issue in this regeneration of brownfield sites is the assessment of contamination and hazards on brownfield sites.  This work focuses on the development of a software tool to assess volumes of contaminated land on brownfield sites.  The tool takes the major information sources including historical information, site investigation data, geological data and assesses the likelihood of ‘hitting’ contamination at any site location based upon minesweeper logic. An important aspect of the tool is an assessment of certainty associated with the available information.  The results include spatial distributions of pollutant and certainty of the result.

 

 

 

 

Air Quality

Prediction of traffic-generated pollution for strategic transport planning

Sponsor: EPSRC

Research Assistant: Dr Maria Mavroulidou

The aim of this research was to develop an easy-to-use tool, for performing an initial assessment of traffic-related air quality. The methodology was based on an interaction matrix technique combined with a GIS. The focus of the study was traffic related emissions in Surrey and the interaction matrix was used to determine the impact of the key parameters on air quality. Once developed, the interaction matrix parameters and weighting values were incorporated within a GIS and analysed spatially. The result was a map predicting the vulnerability of the region to traffic-related pollution.

 

A numerical investigation of traffic-related pollutants in an urban area

Sponsor: University of Surrey

PhD. Student : Ling Ling Lim

Urban air quality is such a concern that there is now legislation, which requires local authorities to improve air quality in their respective areas. A popular strategy is to reduce traffic emissions in regions, which are unlikely to meet existing air quality standards. Tools such as transportation and dispersion models, are used to predict any potential air pollution problems. This research has developed a new system to integrate some of these existing tools. The integrated system is then used to perform air quality assessments and test different traffic management schemes for a range of case studies. This work formed part of a wider investigation to aid transport or environmental planners, in optimising urban traffic routes with local air quality.

 

Comparison of spatial subsets in the analysis of air pollution data

Sponsor: EPSRC

PhD Student: Matthew Lythe

All local authorities in the UK are required to carry out surveys of nitrogen dioxide, with respect to traffic-related air pollution levels. The data are analysed by the authorities in groupings governed by political boundaries, as opposed to zones or regions of similar air quality. As a result pollution patterns can be dominated or distorted by signals from certain areas, or even single sites. The research investigates different modes of selection of air pollution datasets, and how they might significantly affect the results. The differences between the different sets are rationalised, and the implications for the national, and local, NO2 studies are investigated

 

Development of a non-specialist air tool for preliminary air quality assessment

Sponsors: EPSRC, Surrey County Council and the Borough Councils of Surrey.

PhD Student: Iain Cowan

The aim of this research was to develop a tool, which could be used by non-specialists as a preliminary assessment of local air quality. This would highlight potential pollution ‘hot spots’ or determine the consequences of any large-scale development on local pollution levels. The research involves a comprehensive parametric study on air quality using an advanced numerical model. Road orientations, vehicle mixes, road widths and years are investigated to produce ‘lookup’ tables for the screening model. The output is produced spatially using GIS to show the annual average pollution levels from linear sources. The research has also included investigated useful modes of presentation of the data for non-specialist user groups.

 

 

Integrating scientific and lay accounts of air pollution

Sponsors: ESRC and EPSRC

PhD Student: Tanika Kelay

This is a collaborative research project between the Fluids Research Centre and the Environmental Psychology Research Unit at the University of Surrey. The project aims to investigate and account for actual and perceived levels of air pollution in Guildford, Surrey using a multidisciplinary approach. The research utilises a conceptual framework drawn from existing theories and paradigms in the field of environmental psychology, combined with analytical modelling and experimental data from fluid mechanics. The research involves examining the importance of local identity processes, carrying out a large-scale air pollution risk perception survey and comparison of perceived pollution levels with real-time data and results of numerical models. The results have important implications for air quality management and the communication of environmental risk information to the public.

 

Intelligent transport systems

 

Environment v. Traffic – finding the balance

Sponsors: Surrey County Council

EngD. Student: Paul Canning

Surrey County Council is a leader in addressing traffic congestion and has invested in a new Network Management and Information Centre. The introduction of the latest generation of Intelligent Transport Systems will enable an integrated approach to be taken on the application of advanced sensor, computer, electronics and communication technologies as well as management strategies.  The research includes linking road traffic count data to vehicle flow models, adapted for real-time implementation of optimised signal timing plans. This enables congestion to be measured and to trigger traffic management strategies These strategies include changing signal timing patterns to maximise traffic flow through conurbations. Models/applications used include Paramics, Golden River, SCOOT UTC.

 

 

 

Teaching and Administration

 

Module Leader:- MSc and MEng level - Geoenvironmental Engineering

Module Leader:- Level 1 - Professional Engineering Studies

Assistant in undergraduate modules in soil mechanics, design and engineering laboratories.

Supervision of BEng and MEng final year projects

 

Recent Professional Activities

 

Member of EPSRC Peer Review College

Member of the inter-disciplinary Air Quality Research Group for the county of Surrey.

Member of the Editorial Panel for the Institution of Civil Engineering's Proceedings on Geotechnical Engineering (1996-1999).

Presented 'The use of GIS in small projects' at the Geological Society AGM, London, 2000

 

 

Selected Publications

 

 

Journals

 

 

Lim, L.L., Hellawell, E.E. and Hughes, S.J.

Integrated decision support system for urban air quality assessment

Journal of Environmental Modelling and Software Vol. 20/7, pp 947-954, 2005

 

Mavroulidou, M., Hellawell, E.E., Hughes, S.J.

A qualitative tool combining an interaction matrix and a GIS, to map vulnerability to traffic induced air pollution

Journal of Environmental Management, April, Vol. 70/4 pp 283-289 2004

 

Hellawell, E.E., Lamont-Black, J., Kemp, A.C. and Hughes, S.J.

The impact of GIS in geotechnical engineering

The Proceedings of the Institution of Civil Engineers, Journal of Geotechnical Engineering, Volume GT149, Issue 02, April, pp 85-94, 2001

 

Hellawell, E E., Hawley, J.,Pooley, A.J.,Eskesen, S.D., Garrod, B. and Leggett, M.

Metros under construction around the world

Proceedings of the Institution of Civil Engineers, Journal on Geotechnical Engineering 149, Jan. pp29-39, 2001.

 

Hellawell, E.E., Kemp, A.C. and Nancarrow, D.J.

Using GIS raster models to optimise contaminated soil removal

Engineering Geology, 60, April, pp107-116, 2001

 

E.E. Hellawell, C. Savvidou and J.R. Booker,

Modelling of contaminated land reclamation

Soils and Foundations, Japanese Soc. of Civil Eng., Sept. 1994

 

Reports

 

Barry, D.L., Gregory, R.G., Summersgill, I.M and Hellawell, E.E.

Remedial engineering for closed landfill sites

CIRIA Report C558, ISBN:0-86017-557-X, 2001

 

 

 

Rawlings, C.G., Helllawell, E.E. and Kilkenny, W.M.

Grouting for ground engineering

CIRIA Report C514, London, 2000

 

Conferences

 

Lim, L.L., Hughes, S.J. and Hellawell, E.E.

Automating exposure analysis through GIS algorithms

13th Clean Air and Environmental Protection Congress & Exhibition, London, August 2004.

 

Lythe, M.S., Hellawell, E.E., Hughes, S.J.

Diffusion tube sampling strategies in two UK boroughs

13th Clean Air and Environmental Protection Congress & Exhibition, London, August 2004.

 

Kelay, T., Uzzell, D., Gatersleben, B., Hughes, S.J. and Hellawell, E. Integration of Scientific and Lay Accounts of Air Pollution

Society for Risk Analysis (SRA) World Congress on Risk, 22-25 June, Brussels, Belgium 2003.

 

Cowan, I.M., Hellawell, E.E. and Hughes, S.J.

Spatial-analysis of real-time traffic emission data.

Proceedings of the 11th International Symposium for Transport and Air Pollution, Vol. II, ISBN: 3-901351-59-0, pp. 57-63, 19-21 June, Graz, Austria, 2002.

 

Mavroulidou M, Hughes S.J., Hellawell E.E.

A qualitative decision-making tool for transport-planners assessing urban pollution due to traffic

Proceedings of Urban Transport VIII, Seville, March, Sucharov, L.J., Brebbia, C.A., Benitez, F.G. (Eds), WIT, Southampton, pp.375-383 ISBN: 1-85312-905-4, 2002

 

Kelay, T., Uzzell, D.L, Gatersleben, B., Hughes, S.J., Hellawell, E.E.

Integrating scientific and lay accounts of air pollution

Proceedings of Air Pollution IX, pp23-34, ISBN: 1-85312-877-5, Anconna, Italy, 2001.

 

Cowan, I.M., Hellawell, E.E., Hughes, S.J.

The relationship between traffic throughput and the associated primary pollutants in Surrey

Proceedings of Air Pollution IX, pp431-438, ISBN: 1-85312-877-5, Anconna, Italy, 2001.

 

Lythe, M.S., Hughes, S.J. and Hellawell, E.E.

Long-term countywide NO2 variations in Surrey

Proceedings of Air Pollution IX, pp559-568, ISBN: 1-85312-877-5, Anconna, Italy, 2001.

 

Lim, L.L., Hughes, S.J. and Hellawell, E.E.

Investigation of traffic-related pollutants in an urban area

The Third International Conference on Urban Air Quality, CD, Loutraki, Greece, March, 2001.

 

Hellawell, E.E., Kemp, A.C. and Nancarrow,D.J.

Optimising contaminated soil removal using a GIS raster model

Proceedings of the Second Conference on Geoenvironmental Engineering, London, Sept 1999.

 

M Penn, C Savvidou and E E Hellawell,

Centrifuge modelling of the removal of heavy metal pollutants using electrokinetics

Proceedings of the Second International Congress on Environmental Geotechnics, Osaka, Japan, November 1996

 

A. Chan, L. Jendele and E. E. Hellawell,

Numerical comparison of software modelling the transport of pollutants through saturated soil

NUMOG V, Switzerland 1995.

 

A. Chan, L. Jendele and E.E. Hellawell,

Comparison of software for saturated pollutant transport

3rd ACME Conference on Computational Mechanics in the UK, Jan. 1995.

 

E.E.Hellawell and C. Savvidou,

Centrifuge modelling of contaminant migration involving density driven flow

International Conference - Centrifuge 94, ICSMFE, Singapore, 1994

 

E.E. Hellawell, C. Savvidou and J.R. Booker,

Clean up operations in contaminated land

Proc. of Int. Conf. on Environmental Management, Geo-water and Engineering Aspects, Wollongong, Australia, 1993.

 

 

Other publications

 

E.E. Hellawell,

Modelling transport processes in soil due to hydraulic, density and electrical gradients

PhD Dissertation, Cambridge University, 1994.

Hellawell, E E, Rawlings, C G and Kilkenny, W M

Geotechnical grouting: a bibliography

CIRIA Project Report 60, 1998