Bradford, United Kingdom
Bradford, United Kingdom

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Kay P.,University of Leeds | Grayson R.,University of Leeds | Phillips M.,Farming and Wildlife Advisory Group | Stanley K.,Farming and Wildlife Advisory Group | And 6 more authors.
Journal of Hydrology | Year: 2012

Agriculture is estimated to be responsible for 70% of nitrate and 30-50% of phosphorus pollution, contributing to ecological and water treatment problems. Despite the fact that significant gaps remain in our understanding, it is known that agricultural stewardship can be highly effective in controlling water pollution at the plot and field scales. Knowledge at the catchment scale is, to a large extent, entirely lacking though and this is of paramount concern given that the catchment is the management unit used by regulatory authorities. The few studies that have examined the impact of agricultural stewardship at the catchment scale have found that Nitrate Vulnerable Zones (NVZs) in the UK have resulted in little improvement in water quality which concurs with the current catchment study. In addition to NVZs, there was little evidence to suggest that the England Catchment Sensitive Farming Delivery Initiative had impacted water quality and suggestions have been made for improvements, such as ensuring that stewardship measures are used in key pollution source areas and their implementation and impacts are monitored more closely. This will be essential if agricultural catchment management schemes are going to provide the benefits expected of them. Nevertheless, more intensive monitoring than that carried out by regulators showed a significant trend in decreasing winter nitrate peaks in some streams which is hypothesised to be due to recent reduced inorganic fertiliser application as a result of increasing prices. It was concluded that, collectively, these findings indicate that agricultural stewardship measures have the potential to improve water quality at the catchment scale but that voluntary schemes with insufficient financial reward or regulatory pressure are unlikely to be successful. © 2011 Elsevier B.V.


Peters A.,Arup | Booth N.,Yorkshire Water Services Ltd
Dams and Reservoirs | Year: 2016

In a cooperative exercise that was unique at the time in this country, legal, political, administrative and engineering problems had to be overcome to combine the construction of the M62 with a dam across the Scammonden valley. This paper gives an insight into the design and construction of the dam and provides an update from the article published in the first issue of British National Commission on Large Dams News and Views, 1967. © 2016, ICE Publishing: All rights reserved.


Shucksmith J.D.,University of Sheffield | Boxall J.B.,University of Sheffield | Staszewski W.J.,AGH University of Science and Technology | Seth A.,Yorkshire Water Services Ltd. | Beck S.B.M.,University of Sheffield
Journal - American Water Works Association | Year: 2012

Leakage is a major source of lost revenue in pipeline distribution networks. In UK water distribution networks, the amount of treated water lost within distribution networks can reach up to 40% of the total supply. Existing leakage location techniques are heavily dependent on acoustic sensing, which can perform poorly in situations in which the noise created by a leak is small or attenuates rapidly. A reliable, nonacoustic-based location technique would be a significant advance for the water industry. The work presented here applies a pressure transient-based technique for leak location, which has previously only been tested under laboratory conditions, to a live water distribution network. The method has the potential to increase the speed and accuracy of leak locations and reduce the occurrence of inaccurate leak diagnosis. A single device that fits to standard fire hydrants is used to generate a mild transient and collect the required data. This method is based on analyzing pressure waves reflected by leaks and other features in a pipeline and accurately identifies reflections in measurements of the small pressure wave caused by pipeline features, including leaks. The technique requires accurate estimation of the wave propagation speed; a simple empirical approach for determining this is included. © 2012 American Water Works Association.


Grayson R.,University of Leeds | Kay P.,University of Leeds | Foulger M.,Yorkshire Water Services Ltd. | Gledhill S.,Yorkshire Water Services Ltd.
Journal of Hydrology | Year: 2012

Water discolouration is one of the key water quality problems faced by UK water companies taking raw water from peatland catchments. A water colour model has been developed using a combined Geographical Information System and Multicriteria Evaluation approach. The model was used to predict water colour production potential based on key land management practices controlling colour production in UK upland catchments. Calibration of the model with historic data collected at water treatment works treating water from upland areas showed that the model was potentially capable of accurately predicting water colour production potential at the catchment scale (c. 90%). Subsequent validation has shown this to be the case. Rotational heather burning and vegetation type (particularly heather) were identified as the two most statistically significant variables influencing water colour generation in the study catchments. It was predicted that colour is generated in particular hotspots and management to improve water quality should, therefore, focus on such areas. Blending of water is also an important process in controlling colour at the catchment scale and at water treatment works, with high colour often being diluted by runoff from land elsewhere in the catchment with lower potential to generate colour. © 2011 Elsevier B.V.


Chan M.S.M.,Atkins Boreas | Wolsey I.,Yorkshire Water Services Ltd
Proceedings of the Institution of Civil Engineers: Engineering Sustainability | Year: 2016

Blackburn Meadows is one of the largest waste water treatment works and landfills under Yorkshire Water's operation. The site treats sewage from over 450 000 people and produces more than 20000 t of sludge annually, which requires disposal. The sewage sludge is disposed of by means of a number of methods, including incineration followed by landfilling of the ash and direct disposal to landfill. Between 2010 and 2014, the construction and restoration of landfills on the site required approximately 6000 m3 of gravels and 18 000 m3 of topsoil. This paper describes two sustainable examples of material recycling - redundant filter bed gravels from another local site were crushed for reuse in landfill construction and sewage sludge after in situ phyto-conditioning was reused for landfill restoration. Atkins designed the requirements for the reused materials to achieve the most cost-effective specification, which resulted in cost savings of more than 48% for the basal leachate drainage blanket and more than 79% for the restoration layer. Phyto-conditioned sewage sludge is demonstrated to be supporting vegetation on the restored landfills. The construction and restoration of landfills at Blackburn Meadows provided an outlet for approximately 24 000 m3 of materials that would otherwise require disposal by other means.


Soares A.,Cranfield University | Veesam M.,Cranfield University | Simoes F.,Cranfield University | Wood E.,Yorkshire Water Services Ltd | And 2 more authors.
Clean - Soil, Air, Water | Year: 2014

The ability of selected bacteria: Myxococcus xanthus, Bacillus pumilus, Halobacterium salinarum, and Brevibacterium antiquum to produce phosphorus bio-mineral in settled wastewater and sludge dewatering centrifuge liquors was investigated. B. pumilus and B. antiquum were capable of growing and producing bio-minerals identified as struvite that reached up to 250μm in size within ten days. This study opens a completely new route to remove and recover phosphorus as struvite from wastewater, with advantages such as being able to use streams with variable phosphorus concentrations of (7-30mg/L) and no need for external chemicals. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Patent
Cranfield University and YORKSHIRE WATER SERVICES Ltd | Date: 2014-04-30

A phosphate sensor employs a membrane which comprises a molecularly imprinted polymer produced from a thiourea derivative as functional monomer and a phosphate analogue (e.g. phenylphosphonic acid) as template. The membrane can be used for electrochemical detection and quantification of phosphate species, either amperometrically or potentiometrically.


Cook D.M.,Yorkshire Water Services Ltd | Husband P.S.,University of Sheffield | Boxall J.B.,University of Sheffield
Urban Water Journal | Year: 2016

Despite significant on-going investment, water companies continue to receive an unacceptable number of discolouration related customer contacts. In this paper, data from intensive distribution system turbidity monitoring and cluster analysis of discolouration customer contacts indicate that a significant proportion of these contacts are due to material mobilising from the trunk main system, and operational flow increases are shown to have a higher discolouration risk than burst incidents. A trunk main discolouration incident highlighting this risk is discussed, demonstrating the need for pro-active trunk main risk assessments. To identify the source of the material event flow rates were modelled using the PODDS (prediction of discolouration in distribution systems) discolouration model. Best practice pro-active management is demonstrated in a case study where the PODDS model is used to implement managed incremental flow changes on a main with known discolouration risk with no discolouration impact to customers and significant cost savings. © 2015 Taylor & Francis.


Patent
Yorkshire Water Services Ltd | Date: 2011-08-31

A material recycling apparatus (10) and an associated method. The material recycling apparatus comprises a mobile chassis (20) upon which is mounted a hopper (30) for receiving material to be recycled; a separator (40) arranged to receive material from the hopper (30) and to select correctly-sized material; a mixer (50) arranged to receive the correctly-sized material and to combine the correctly-sized material with one or more additives to create mixed material, and to discharge the material.


Booth N.,Yorkshire Water Services Ltd
Dams and Reservoirs | Year: 2015

The 2015 supervising engineers’ forum was held at the National Motorcycle Museum, Birmingham, on 29 April 2015. The sessions covered the following topics: updates in legislation; a practical session looking at incidents, planned maintenance and health and safety; risk management; and succession planning and industry developments. © 2015, ICE Publishing. All Rights Reserved.

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