News Article | October 5, 2016
Harwell, Oxfordshire, 05th October, 2016. Rezatec announced today the launch process for a new set of geospatial data analytics to improve the resilience of the world’s cities to changing environmental, economic and social pressures. The Rezatec resilience service delivers data analytics via a web-based portal to infrastructure and urban asset managers providing mission critical insights to support highly-targeted improvements and mitigating actions against subsidence, flooding, climate change and human-related urban landscape changes. There is an escalating global need for cities to become more resilient to fast-changing human and natural environmental pressures. In tandem, there is also a growing availability of satellite-derived earth observation data that allows the hyper-detailed mapping, monitoring and analysis of the natural landscapes and the built environment. This initiative addresses the growing requirement for predictive decision-support tools for urban infrastructure managers. Through the evolution of Rezatec’s geospatial data analytics services and the incorporation of new satellite data sources, e.g. ESA’s Sentinel 1 and 2, these tools are set to become the future of strategic urban planning. The planned service will make use of Rezatec’s machine learning technology and techniques applied to satellite data (using a mixture of sensor types including Optical, Synthetic Aperture Radar, Thermal Infra-Red and LIDAR), Global Navigation Satellite System (GNSS) devices and Satellite Communications to collect and send ground data from locations where mobile network coverage cannot be relied upon. This pioneering initiative is supported by the European Space Agency (ESA) as part of the ARTES Integrated Applications Promotion (IAP) programme, which is dedicated to funding and promoting the development of space-based applications, services and solutions for the needs of European citizens and society at large. Philip Briscoe, Business Unit Director, Rezatec, states “We expect the URGED project to have a profound effect on city-regional economic, environmental and human wellbeing by demonstrating the value of space data in enabling strategic investment and decision making to support more resilient development pathways.” Roberto Cossu, Application Engineer, European Space Agency said “Rezatec’s urban resilience project is important not just in terms of commercial opportunity but its value to future cities to enable them to meet environmental and social challenges.” Rezatec’s innovative predictive decision-support tools can identify where there is the likely high risk of subsidence and flooding by applying predictive analysis and techniques. These powerful data insights are then provided via subscription-based access to dynamically-updated data analytics as a service, which represents a new commercial model with greater scalability and price advantages than current consulting based approaches. As an example, the project data products can be used by infrastructure management companies, water companies and town/city authorities to: The initiative kicked-off in May 2016 and Rezatec is has started planning the pilot implementations with named end-users: Welsh Water, Wessex Water, AMEC Foster Wheeler and The Ecological Sequestration Trust (TEST). Editor’s notes About Rezatec Rezatec™ applies new science to Earth Observation (EO) data to produce high value geospatial data analytics that substantially reduce the cost of quantifying, monitoring and verifying land use change and environmental risk. Rezatec’s unique strength lies in its ability to aggregate large amounts of diverse data from satellite, airborne and ground instruments to provide critical decision support for science and non-science users. Headquartered within the UK Space Gateway in Oxfordshire, in the UK, Rezatec customers today are spread across the utilities, agribusiness, energy, urban and forestry sectors. For more information about Rezatec visit www.rezatec.com
Spears B.M.,UK Center for Ecology and Hydrology |
Lurling M.,Environmental Quality Management |
Lurling M.,Netherlands Institute of Ecology |
Yasseri S.,Institute Dr Nowak |
And 8 more authors.
Water Research | Year: 2013
Phoslock® is a lanthanum (La) modified bentonite clay that is being increasingly used as a geo-engineering tool for the control of legacy phosphorus (P) release from lake bed sediments to overlying waters. This study investigates the potential for negative ecological impacts from elevated La concentrations associated with the use of Phoslock® across 16 case study lakes. Impact-recovery trajectories associated with total lanthanum (TLa) andfilterable La (FLa) concentrations in surface and bottom waters were quantified over aperiod of up to 60 months following Phoslock® application. Both surface and bottomwaterTLa and FLa concentrations were <0.001mgL-1 in all lakes prior to the application ofPhoslock®. The effects of Phoslock® application were evident in the post-applicationmaximum TLa and FLa concentrations reported for surface waters between 0.026mgL-1-2.30mgL-1 and 0.002mgL-1 to 0.14mgL-1, respectively. Results of generalised additive modelling indicated that recovery trajectories for TLa and FLa in surface and bottom waters in lakes were represented by 2nd order decay relationships, with time, and that recovery reached an end-point between 3 and 12 months post-application. Recovery in bottom water was slower (11-12 months) than surface waters (3-8 months), most probably as a result of variation in physicochemical conditions of the receiving waters and associated effects on product settling rates and processes relating to the disturbance of bed sediments. CHEAQS PRO modelling was also undertaken on 11 of the treated lakes in order to predict concentrations of La3+ ions and the potential for negative ecological impacts. This modelling indicated that the concentrations of La3+ ions will be very low (<0.0004mgL-1) in lakes of moderately low to high alkalinity (>0.8mEqL-1), but higher (up to 0.12mgL-1) in lakes characterised by very low alkalinity. The effects of elevated La3+ concentrations following Phoslock® applications in lakes of very low alkalinity requires further evaluation. The implications for the use of Phoslock® in eutrophication management are discussed. © 2013 Elsevier Ltd.
Petrie B.,University of Bath |
Youdan J.,Wessex Water |
Barden R.,Wessex Water |
Kasprzyk-Hordern B.,University of Bath
Journal of Chromatography A | Year: 2016
Reported herein is new analytical methodology for the determination of 90 emerging contaminants (ECs) in liquid environmental matrices (crude wastewater, final effluent and river water). The application of a novel buffer, ammonium fluoride improved signal response for several ECs determined in negative ionisation mode. Most notably the sensitivity of steroid estrogens was improved by 4-5 times in environmental extracts. Method recoveries ranged from 40 to 152% in all matrices and method quantitation limits (MQLs) achieved were <1ngL-1for numerous ECs. Development of a microwave assisted extraction (MAE) protocol as an additional sample extraction step for solid matrices enabled 63 ECs to be simultaneously analysed in digested sludge. To the authors knowledge this is considerably more than any previously reported MAE method. Here, MQLs ranged from 0.1-24.1 ngg-1dry weight. The application of MAE offers several advantages over pressurized liquid extraction including faster sample preparation, lower solvent requirements, and the ability to perform several extractions simultaneously as well as lower purchasing and running costs. To demonstrate the method's sensitivity, application to environmental samples revealed 68 and 40 ECs to be above their respective MQL in liquid environmental samples and digested sludge, respectively. To date, this is the most comprehensive multi-residue analytical method reported in the literature for the determination of ECs in both liquid and solid environmental matrices. © 2016 The Authors.
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.
News Article | December 2, 2016
Mildren Construction and Wessex Water teamed up with Selwoods to hold a charity golf day at Bowood Golf Course
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.
Douterelo I.,University of Sheffield |
Jackson M.,Wessex Water |
Solomon C.,Wessex Water |
Boxall J.,University of Sheffield
Applied Microbiology and Biotechnology | Year: 2016
Biofilm formation in drinking water distribution systems (DWDS) is influenced by the source water, the supply infrastructure and the operation of the system. A holistic approach was used to advance knowledge on the development of mixed species biofilms in situ, by using biofilm sampling devices installed in chlorinated networks. Key physico-chemical parameters and conventional microbial indicators for drinking water quality were analysed. Biofilm coverage on pipes was evaluated by scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM). The microbial community structure, bacteria and fungi, of water and biofilms was assessed using pyrosequencing. Conventional wisdom leads to an expectation for less microbial diversity in groundwater supplied systems. However, the analysis of bulk water showed higher microbial diversity in groundwater site samples compared with the surface water site. Conversely, higher diversity and richness were detected in biofilms from the surface water site. The average biofilm coverage was similar among sites. Disinfection residual and other key variables were similar between the two sites, other than nitrates, alkalinity and the hydraulic conditions which were extremely low at the groundwater site. Thus, the unexpected result of an exceptionally low diversity with few dominant genera (Pseudomonas and Basidiobolus) in groundwater biofilm samples, despite the more diverse community in the bulk water, is attributed to the low-flow hydraulic conditions. This finding evidences that the local environmental conditions are shaping biofilm formation, composition and amount, and hence managing these is critical for the best operation of DWDS to safeguard water quality. © 2015, The Author(s).
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.
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.
PubMed | University of Sheffield and Wessex Water
Type: | Journal: The Science of the total environment | Year: 2017
Biofilms are ubiquitous throughout drinking water distribution systems (DWDS), playing central roles in system performance and delivery of safe clean drinking water. However, little is known about how the interaction of abiotic and biotic factors influence the microbial communities of these biofilms in real systems. Results are presented here from a one-year study using in situ sampling devices installed in two operational systems supplied with different source waters. Independently of the characteristics of the incoming water and marked differences in hydraulic conditions between sites and over time, a core bacterial community was observed in all samples suggesting that internal factors (autogenic) are central in shaping biofilm formation and composition. From this it is apparent that future research and management strategies need to consider the specific microorganisms found to be able to colonise pipe surfaces and form biofilms, such that it might be possible to exclude these and hence protect the supply of safe clean drinking water.