Now showing items 7-26 of 46

  • Developing a planning and design framework for retrofit SUDS 

    Singh, Rohit; Jefferies, Christopher; Stovin, V.; Morrison, G.; Gillon, S. (IAHR/IWA, 2005-08-25)
    Sustainable Urban Drainage Systems (SUDS) are attracting increased attention due to their ability to attenuate flow, reduce flooding and improve water quality. However, planning of retrofit and new SUDS remains unclear in ...
  • Disconnection of surface water drainage: a local authority perspective 

    Jefferies, Christopher; Duffy, A.; Zuurman, A.; Tingle, S. (IAHR/IWA, 2008-08)
    This paper argues the case for the disconnection of surface water from combined sewer systems drawing on experience gained from the European Interreg IIIB project ‘Urban Water’. Data and examples drawn from Netherlands and ...
  • Evidence of traffic-related pollutant control in soil-based Sustainable Urban Drainage Systems (SUDS) 

    Napier, F.; Jefferies, Christopher; Heal, K. V.; Fogg, P.; Arcy, B. J. D.; Clarke, R. (IWA Publishing, 2009)
    SUDS are being increasingly employed to control highway runoff and have the potential to protect groundwater and surface water quality by minimising the risks of both point and diffuse sources of pollution. While these ...
  • Evidence of traffic-related pollutant control in soil-based Sustainable Urban Drainage Systems (SUDS) 

    Napier, F.; Jefferies, Christopher; Heal, K. V.; Fogg, P.; D'Arcy, B. J.; Clarke, R. (IAHR/IWA, 2008-08)
    SUDS are being increasingly employed to control highway runoff and have the potential to protect groundwater and surface water quality by minimising the risks of both point and diffuse sources of pollution. While these ...
  • GIS-based location suitability of decentralized, medium scale bioenergy developments to estimate transport CO2 emissions and costs 

    Kurka, Thomas; Jefferies, Christopher; Blackwood, David J. (Elsevier, 2012-11)
    This paper presents a transferable and adaptable GIS-based approach to identify suitable locations of medium scale CHP bioenergy plants. Location suitability of bioenergy plants is of particular importance in planning ...
  • Gross solid transport in sewers 

    Butler, D.; Davies, J. W.; Jefferies, Christopher; Schütze, M. (Thomas Telford, 2003-06)
    Gross solid transport in sewers has been studied in the laboratory, by theoretical analysis, and in the field. A simplified model is proposed that can be run as an extension of existing sewer software packages (for example ...
  • Gross solids transport and degradation 

    Davies, J. W.; Butler, D.; Small, J. L.; Sekuloski, V.; Jefferies, Christopher (IWA Publishing, 1998)
    The paper describes the first stages of a study of the origin, transport, and fate of sewer gross solids. The background to the project, its overall plan, and relevant previous studies are outlined. Progress to-date is ...
  • Medium-term performance and maintenance of SUDS: a case-study of Hopwood Park Motorway Service Area, UK 

    Heal, K. V.; Bray, R.; Willingale, S. A. J.; Briers, M.; Napier, F.; Jefferies, Christopher; Fogg, P. (IWA Publishing, 2009)
    One of the main barriers to implementing SUDS is concern about performance and maintenance costs since there are few well-documented case-studies. This paper summarizes studies conducted between 2000 and 2008 of the ...
  • Medium-term performance and maintenance of SUDS: a case-study of Hopwood Park Motorway Service Area, UK 

    Heal, K. V.; Bray, R.; Willingale, S. A. J.; Briers, M.; Napier, F.; Jefferies, Christopher; Fogg, P. (IAHR/IWA, 2008-08)
    One of the main barriers to implementing SUDS is concern about performance and maintenance costs since there are few well-documented case-studies. This paper summarizes studies conducted between 2000 and 2008 of the ...
  • Methods of estimating the discharge of gross solids from combined sewer systems 

    Jefferies, Christopher (IWA Publishing, 1992)
    Visible pollution discharged from two combined sewer overflows were studied using passive Trash Trap devices and the UK Water Research Centre Gross Solids Sampler. Relationships are presented for the number of visible ...
  • Microbial aspects of sewage and sewage sludge in Dundee, Scotland 

    Jefferies, Christopher; Young, H. K.; McGregor, I. (IWA Publishing, 1990)
    Studies of the populations of coliforms and faecal streptococci in sewage and sewer sediments have been carried out in Dundee. Samples have been obtained and tested by standard methods from five storm and five dry weather ...
  • Modelling of flow through gravel-filled trenches 

    Schluter, W.; Jefferies, Christopher; Zhang, Xiaoxian (Taylor & Francis, 2007-12)
    Today's standardized computer models for simulating flow through in-ground sustainable urban drainage systems (SUDS) require substantial monitoring data in order to allow for a realistic representation of system behaviour, ...
  • Modelling the outflow from a porous pavement 

    Schlüter, Wolfram; Jefferies, Christopher (Taylor & Francis, 2002-09)
    The porous pavement of industrial and commercial areas is a form of sustainable urban drainage (SUD) system which has been developed to reduce runoff flow rates and volumes. This study reports on the modelling of the ...
  • The performance of a novel combined sewer overflow with perforated conical screen 

    Jefferies, Christopher; Allinson, C. L.; McKeown, J. (IWA Publishing, 1998)
    Increasing concern over the discharge of sewer solids from combined sewer overflows (CSOs) has encouraged the introduction of installations which incorporate either mesh or bar screen arrangements, or both. Gross solids ...
  • Performance of family-size sequencing batch reactor and rotating biological contactor units treating sewage at various operating conditions 

    Akunna, Joseph C.; Jefferies, Christopher (IWA Publishing, 2000)
    Field trials were carried out using two types of package units designed for the treatment of domestic sewage from individual households. One of the units was a commercially available rotating biological contactor (RBC) ...
  • Pollution profiling and particle size distribution within permeable paving units – with and without a geotextile 

    Mullaney, Jennifer; Rikalainen, Päivi; Jefferies, Christopher (Emerald, 2012)
    The aim of this paper is to investigate the sediment and pollution profiling and particle size distribution with depth within permeable paving structures, both with and without a geotextile. Test rigs set up in an earlier ...
  • Pollutional aspects of gross solids and their interaction with sewer sediments 

    Milne, David A.; Jefferies, Christopher; Ashley, Richard M. (IWA Publishing, 1996)
    This paper describes a study programme underway in the upper Perth Road catchment in Dundee to estimate the effect of gross solids and their interaction with the sediment found within a combined sewer network. Gross solids ...
  • Portable sewage flow sensors: their calibration and accuracy 

    Watt, I. A.; Jefferies, Christopher (IWA Publishing, 1996)
    An accurate assessment of flows is essential for any study of the hydraulic performance of a sewer system or the pollutant removal efficiency of an effluent treatment plant. Flow measurement relies either on fixed flumes, ...
  • Public and private owners: getting the message across 

    Jefferies, Christopher (Ministry of Transport, Public Works and Water Management - The Netherlands, 2005)
    Partners in the INTERREG IIIB project ‘Urban Water’ have adopted a number of different approaches and timescales to rainwater management within their communities. Some, particularly in Holland, have adopted disconnection ...
  • The quality of sewage flows and sediment in Dundee 

    Ashley, R. M.; Coghlan, B. P.; Jefferies, Christopher (IWA Publishing, 1990)
    Inter-related studies are underway in Dundee to investigate the nature, origins, disposition and movements of sewer sediments and associated pollutants. These studies, funded mainly by the Water Research Centre, have ...