Husband S.,University of Sheffield |
Jackson M.,Wessex Water |
Boxall J.,University of Sheffield
Procedia Engineering | Year: 2015
Discolouration is an international phenomenon in drinking water distribution systems due to erosion of particulate material layers. In the UK water companies are implementing hydraulic layer conditioning for maintenance and resilience with significant cost benefits, despite limited understanding of the material accumulation processes. In this paper 18 months turbidity data from a 4 km trunk main is simulated using four extended period Epanet MSX model formulations. The measured data demonstrates recurrent regeneration of discolouration risk and hydraulic conditioning as pro-active mitigation. Modelling facilitates investigation of layer regeneration processes, helping inform future discolouration models and operational strategies to safeguard water quality. © 2015 The Authors. Published by Elsevier Ltd.
Welbank J.,Wessex Water
Dams and Reservoirs | Year: 2012
One of the four tours on the second day of the British Dam Society conference in Leeds in September 2012 visited three dams in the Holme valley: Brownhill, Ramsden and Riding Wood.
Ohigboye D.,Wessex Water |
Hayes I.,Area 1 P.O. Box 1851
The Future of Water, Sanitation and Hygiene in Low-Income Countries: Innovation, Adaptation and Engagement in a Changing World - Proceedings of the 35th WEDC International Conference | Year: 2011
Since 2007 PJWS have supported Anam bra 's Water and Sanitation Sector Reform Programme, and reports from the six visits have made assessments and recommendations covering: institutional roles in the sector; the capacity of state institutions; and the development of a restructuring plan. This review looked into previous technical support to the State, by evaluating the effectiveness, and use of recommendations in the reform activities, and to identify opportunities for the next steps for technical support and advice in knowledge management at an infroductory level with guidance on how it could be implemented. The evaluation was based on discussions with all the major stakeholders and on ground observations during the visit. Findings clearly shows a gradual shift from a cenfralised government supply oriented delivery, to a consumer demand led framework based on regulation, service delivery focused on the independence, effectiveness of service providers and sustainability.
Petrie B.,University of Bath |
Barden R.,Wessex Water |
Kasprzyk-Hordern B.,University of Bath
Water Research | Year: 2014
This review identifies understudied areas of emerging contaminant (EC) research in wastewaters and the environment, and recommends direction for future monitoring. Non-regulated trace organic ECs including pharmaceuticals, illicit drugs and personal care products are focused on due to ongoing policy initiatives and the expectant broadening of environmental legislation. These ECs are ubiquitous in the aquatic environment, mainly derived from the discharge of municipal wastewater effluents. Their presence is of concern due to the possible ecological impact (e.g., endocrine disruption) to biota within the environment. To better understand their fate in wastewaters and in the environment, a standardised approach to sampling is needed. This ensures representative data is attained and facilitates a better understanding of spatial and temporal trends of EC occurrence. During wastewater treatment, there is a lack of suspended particulate matter analysis due to further preparation requirements and a lack of good analytical approaches. This results in the under-reporting of several ECs entering wastewater treatment works (WwTWs) and the aquatic environment. Also, sludge can act as a concentrating medium for some chemicals during wastewater treatment. The majority of treated sludge is applied directly to agricultural land without analysis for ECs. As a result there is a paucity of information on the fate of ECs in soils and consequently, there has been no driver to investigate the toxicity to exposed terrestrial organisms. Therefore a more holistic approach to environmental monitoring is required, such that the fate and impact of ECs in all exposed environmental compartments are studied. The traditional analytical approach of applying targeted screening with low resolution mass spectrometry (e.g., triple quadrupoles) results in numerous chemicals such as transformation products going undetected. These can exhibit similar toxicity to the parent EC, demonstrating the necessity of using an integrated analytical approach which compliments targeted and non-targeted screening with biological assays to measure ecological impact. With respect to current toxicity testing protocols, failure to consider the enantiomeric distribution of chiral compounds found in the environment, and the possible toxicological differences between enantiomers is concerning. Such information is essential for the development of more accurate environmental risk assessment. © 2014 The Authors.
Bowles F.J.,Wessex Water |
Henderson P.,Dwr Cymru Welsh Water
Fisheries Management and Ecology | Year: 2012
The potential effects of abstraction for water supply on salmonid populations in England and Wales are reviewed. The duties of water resource planning and the contribution of the water industry investment in river basin management planning are discussed. Given the possible effects of climate change on public water supply and demand, and the uncertainty of hydroecological relationships, key principles to ensure long-term investment by water utility companies to meet European Union Water Framework Directive standards achieve the best benefit for salmonids are recommended. © 2011 Blackwell Publishing Ltd.