DOCSLIB.ORG

Dams and Reservoirs

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Dams and Reservoirs Dams and Reservoirs Local knowledge, global expertise About Arup Front cover image: Ulley Reservoir, UK Arup is a firm of designers, engineers and business consultants providing a diverse range of professional services to clients. The firm is the creative and inspirational force behind many of the world’s most innovative and sustainable planning, building and infrastructure projects. We believe that talented people and collaborative working relationships form the basis of successful project delivery. By sharing knowledge and expertise with colleagues across the globe, our local teams can draw upon a wide range of specialist skills. Through bringing together an unrivalled range of technical, design, creative and management expertise we create real value for our clients. We are a wholly independent organisation owned in trust, giving us the freedom to work on some of the most challenging projects in the world. We have more than 10,000 staff working in 90 offices in more than 30 countries. Arup’s multi-disciplinary approach means that any given project may involve people from any or all of the sectors or regions in which we operate. Our fundamental aim is to bring together the best professionals to meet our clients’ needs. Copenhagen Moscow Dublin, Cork, Amsterdam Berlin Galway and Limerick Warsaw Düsseldorf London and 14 Kiev Krakow other UK offices Frankfurt Wroclaw Seattle Toronto Milan Bucharest Boston Belgrade Chicago New York and Madrid Rome Istanbul Ankara Beijing San Francisco New Jersey Seoul Washington DC Tianjin Tokyo Los Angeles Wuhan Houston Chongqing Shanghai Dubai Doha Shenzhen Guangzhou Taipei Abu Dhabi Macau Hong Kong Mumbai Hyderabad Bangkok Phnom Penh Manila Abuja Ho Chi Minh City Penang Kota Kinabalu Lagos Kuala Lumpur Brunei Singapore Harare Cairns Bulawayo Port Louis Townsville Rio de Janeiro Gaborone São Paulo Brisbane Johannesburg Durban Perth Sydney Cape Town Adelaide Auckland Melbourne Introduction Dams and Reservoirs La Ferme Dam, Mauritius Dams and reservoirs are crucial for the storage of water, whether Our services include the following: it is for potable water supply, flood alleviation, hydro-electricity, - Planning and promotion of proposed or irrigation. The development of a new dam or reservoir, the final developments choice of site and design of the structure will depend not only on the topography but also on the geology, seismic activity and - Expert advice environmental impact. - Feasibility and design - Hydrolology and water resources planning Arup’s holistic approach delivers dam and reservoir projects, on - Remedial works and rehabilitation time and to budget. Seeking excellence in every aspect of our work and organisation provides the very best service to our clients. Our - Construction supervision and project approach considers the social, technical, economic and environmental management issues for a sustainable solution within the local, regional and - Supervision and inspection of existing national political context. dams and reservoirs - Hazard indexing and risk assessment Our constantly evolving skills base reflects the diversity of both our - Geotechnical appraisal clients and our staff. However complex the challenge, we have the expertise and the resources to resolve it. - Sustainability appraisal and environmental assessment Our objective is to help our clients meet their business needs by - Reservoir safety studies, seismic and dam adding value through technical excellence, efficient management and break analysis personal service. To this end we are professionally committed to - Decommissioning of existing assets providing optimal solutions to all our clients in the water engineering - Hydropower assessment and sector. implementation - Technical research - Computational fluid dynamics Dams and Reservoirs Feasibility and Design Arup has over 60 years experience of modern dam design. We have worked with clients at all stages of the design process. Our input into recent schemes has included: - Desk studies and site selection - Site investigation - Optioneering and value engineering - Hydrological analysis and water resources planning - Feasibility and planning stage design - Hydraulic analysis of control structures Vistula Dam Study, Poland - Geotechnical, structural and seismic analysis Arup is undertaking a feasibility study for a possible - Consideration of environmental impact and sustainability second dam on Vistula River, located in the protected area of Natura 2000. Our scope of work includes concept - Technical review and expert advice design, multi-criteria analysis of several locations and - Contract management and site supervision solutions, Environmental Impact Assessment, a cost benefit analysis and dam breach analysis. We have been involved with the design and construction of earth embankment dams; concrete gravity dams; concrete buttress dams; rockfill dams and a concrete arch dam. Design work has also been carried out on Roller Compacted Concrete (RCC) dams. Our input has ranged from small local schemes to large international projects and at all stages of the design process. Arup has a strong capability in hydrological analysis of proposed and existing reservoirs and can provide specialist input on all aspects of the water cycle, including yield analysis and water resources planning. We carry out flood risk assessments of existing dams, Cheddar Reservoir Number 2, UK working closely with our inspecting engineers to support their Arup is providing advice on feasibility, planning and assessments of the structures. Such analyses have been carried out for delivery of a new 6,000 Ml raw water storage reservoir individual reservoirs, cascades of multiple reservoirs, and portfolios at Cheddar, in Somerset, England. The new reservoir will of reservoir assets. be fed from Mendip spring sources close to the famous Cheddar Gorge show caves, and gravitate from there to the existing reservoir, located nearby. Our hydrologists have been involved in the selection and development of new reservoir sites; optimisation of both proposed and existing dams and detailing of control structures, including detailed hydraulic analysis, leading to scour protection and stilling basin design. Dam spillway hydraulics can often be highly complex, therefore we adopt a tiered approach to hydraulic analysis to ensure the level of assessment carried out is proportionate to the design implications. Where necessary, we can go into the highest level of detail, using physical modelling and computational fluid dynamics to drive the design. Upper Thames Reservoir, UK Arup provided project management skills and advice on the broad range of planning and consultation issues involved in Thames Water’s proposal for a new reservoir. It would be the largest of its kind in Europe, with a base area of approximately 10 km². Dams and Reservoirs Pickering Flood Alleviation Scheme, UK Lotsane Dam, Botswana Arup is undertaking detailed design of a large raised Arup has been engaged for the feasibility study, tender and reservoir to operate as flood storage, attenuating the 25 construction supervision services for Lotsane Dam. Upon year event at Pickering. The scheme is highly sensitive completion it will have a 30m high, 1,5km long earth/ and public perception is paramount. The site borders an rockfill dam with an ungated 180m long spillway crest and important SSSI and is bounded by a privately owned steam an active storage of 42 million m³. railway. Foxwood Dam, South Africa Murowa Dam, Zimbabwe Arup is undertaking a detailed feasibility study for Arup provided full design and construction supervision Foxwood Dam on the Koonap River in Adelaide. Our of the mine water supply. The scheme comprised of water scope of work includes water resource assessments, resource assessments to meet a high level of assurance of environmental scoping, geotechnical investigations, dam supply, an off river storage dam, a pumping station with design and agricultural assessments. an off take weir on the Runde River and steel and GRP pipelines. Letsibogo Dam, Botswana Lower Notwane Dam, Botswana Arup was appointed in a Joint Venture for the detailed Arup undertook a pre-feasibility study to identify dam design and construction supervision of this 27m high and off river storage sites on the Lower Notwane River rockfill dam and outlet works. This involved a detailed and its tributaries. The river is one of the last non review of the hydrology, project optimisation and utilised major surface water resources in Botswana. Its geotechnical assessment. catchment includes the capital Gaborone and other large connurbations as well as Gaborone dam and Bokaa dam. Dams and Reservoirs Dam Safety Inspections Regular inspection and supervision of existing dams is imperative in minimising risk and highlighting potential issues in a timely manner. This enables further studies or remedial works to be programmed before becoming critical to the safety of the structure. Arup has particular experience in: - assessing the safety of existing dams - undertaking risk assessments - design and implementation of remedial measures - dam break and inundation maps Rogun Dam, Tajikistan - emergency planning Arup is providing expert advice to the World Bank on dam - expert witness engineering, dam safety and seismic engineering for the - construction supervision Rogun hydropower plant in Tajikistan, Central Asia. When completed, the 335m high Rogun Dam will be the tallest dam in the world. The Rogun hydropower plant will have a We have undertaken a number of dam safety
Load more

Recommended publications
  • Valid From: 01 September 2019 Bus Service(S) What's Changed Areas
    Bus service(s) 208 Valid from: 01 September 2019 Areas served Places on the route Sheffield Sheffield Interchange Carbrook Ice Sheffield Meadowhall Tinsley Brinsworth Meadowhall Interchange Canklow Dinnington Interchange Whiston Thurcroft Laughton Common Dinnington What’s changed Route and timetable changes. Operator(s) How can I get more information? TravelSouthYorkshire @TSYalerts 01709 51 51 51 Bus route map for service 208 01/02/2019 Scholes Parkgate Dalton Thrybergh Braithwell Ecclesfield Ravenfield Common Kimberworth East Dene Blackburn ! Holmes Meadowhall, Interchange Flanderwell Brinsworth, Hellaby Bonet Lane/ Bramley Wincobank Brinsworth Lane Maltby ! Longley ! Brinsworth, Meadowhall, Whiston, Worrygoose Lane/Reresby Drive ! Ñ Whitehill Lane/ Meadowhall Drive/ Hooton Levitt Bawtry Road Meadowhall Way 208 Norwood ! Thurcroft, Morthen Road/Green Lane Meadowhall, Whiston, ! Meadowhall Way/ Worrygoose Lane/ Atterclie, Vulcan Road Greystones Road Thurcroft, Katherine Road/Green Arbour Road ! Pitsmoor Atterclie Road/ Brinsworth, Staniforth Road Comprehensive School Bus Park ! Thurcroft, Katherine Road/Peter Street Laughton Common, ! ! Station Road/Hangsman Lane ! Atterclie, AtterclieDarnall Road/Shortridge Street ! ! ! Treeton Dinnington, ! ! ! Ulley ! Doe Quarry Lane/ ! ! ! Dinnington Comp School ! Sheeld, Interchange Laughton Common, Station Road/ ! 208! Rotherham Road 208 ! Aughton ! Handsworth ! 208 !! Manor !! Dinnington, Interchange Richmond ! ! ! Aston database right 2019 Swallownest and Heeley Todwick ! Woodhouse yright p o c Intake North Anston own r C Hurlfield ! data © y Frecheville e Beighton v Sur e South Anston c ! Wales dnan ! r O ! ! ! ! Kiveton Park ! ! ! ! ! ! Sothall ontains C 2019 ! = Terminus point = Public transport = Shopping area = Bus route & stops = Rail line & station = Tram route & stop 24 hour clock 24 hour clock Throughout South Yorkshire our timetables use the 24 hour clock to avoid confusion between am and pm times.
    [Show full text]
  • Botswana Environment Statistics Water Digest 2018
    Botswana Environment Statistics Water Digest 2018 Private Bag 0024 Gaborone TOLL FREE NUMBER: 0800600200 Tel: ( +267) 367 1300 Fax: ( +267) 395 2201 E-mail: [email protected] Website: http://www.statsbots.org.bw Published by STATISTICS BOTSWANA Private Bag 0024, Gaborone Phone: 3671300 Fax: 3952201 Email: [email protected] Website: www.statsbots.org.bw Contact Unit: Environment Statistics Unit Phone: 367 1300 ISBN: 978-99968-482-3-0 (e-book) Copyright © Statistics Botswana 2020 No part of this information shall be reproduced, stored in a Retrieval system, or even transmitted in any form or by any means, whether electronically, mechanically, photocopying or otherwise, without the prior permission of Statistics Botswana. BOTSWANA ENVIRONMENT STATISTICS WATER DIGEST 2018 Statistics Botswana PREFACE This is Statistics Botswana’s annual Botswana Environment Statistics: Water Digest. It is the first solely water statistics annual digest. This Digest will provide data for use by decision-makers in water management and development and provide tools for the monitoring of trends in water statistics. The indicators in this report cover data on dam levels, water production, billed water consumption, non-revenue water, and water supplied to mines. It is envisaged that coverage of indicators will be expanded as more data becomes available. International standards and guidelines were followed in the compilation of this report. The United Nations Framework for the Development of Environment Statistics (UNFDES) and the United Nations International Recommendations for Water Statistics were particularly useful guidelines. The data collected herein will feed into the UN System of Environmental Economic Accounting (SEEA) for water and hence facilitate an informed management of water resources.
    [Show full text]
  • Botswana Environment Statistics Water Climate
    BOTSWANA ENVIRONMENT STATISTICS: WATER & CLIMATE DIGEST 2014 Published by Statistics Botswana Private Bag 0024, Gaborone Phone: 3671300 Email: [email protected] Contact Unit: Environment Statistics Unit Phone: 3671395 Copyright Reserved © 2015 Extracts may be published if Sources are duly acknowledged ISBN: 978-99968-429-8-6 PREFACE This is the first edition of the Botswana Environment: Water and Climate Digest, which eventually will be produced on a quarterly basis. The purpose of the Digest is to provide data for use by decision-makers in water management as well as for monitoring trends related to climate. The indicators in this report cover data on dam levels, water production, rainfall and temperature. The indicators will however be gradually expanded in subsequent editions as more data become available. In compiling this report, international standards and guidelines were followed, particularly the United Nations Framework for the Development of Environment Statistics (UNFDES) and the United Nations International Recommendations for Water Statistics. Eventually, the data collected through these methodologies would feed into the UN System of Environmental Economic Accounting (SEEA) for water and hence facilitate an informed management of water resources. The sustained production of the Water and Climate Digest would depend on the cooperation of relevant data providers to provide the necessary data. I therefore would like to extend by gratitude and appreciation to all stakeholders who assisted in the production of this digest, in particular the Water Utilities Corporation and the Department of Meteorological Services for availing the water and climate data as required. For more information and further enquiries, contact the Directorate of Stakeholder Relations at 3671300.
    [Show full text]
  • A Deterministic Method for Evaluating Block Stability on Masonry Spillways
    Utah State University DigitalCommons@USU International Symposium on Hydraulic Structures May 16th, 12:10 PM A Deterministic Method for Evaluating Block Stability on Masonry Spillways Owen John Chesterton Mott MacDonald, [email protected] John G. Heald Mott MacDonald John P. Wilson Mott MacDonald Bently John R. Foster Mott MacDonald Bently Charlie Shaw Mott MacDonald See next page for additional authors Follow this and additional works at: https://digitalcommons.usu.edu/ishs Recommended Citation Chesterton, Owen (2018). A Deterministic Method for Evaluating Block Stability on Masonry Spillways. Daniel Bung, Blake Tullis, 7th IAHR International Symposium on Hydraulic Structures, Aachen, Germany, 15-18 May. doi: 10.15142/T3N64T (978-0-692-13277-7). This Event is brought to you for free and open access by the Conferences and Events at DigitalCommons@USU. It has been accepted for inclusion in International Symposium on Hydraulic Structures by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. Author Information Owen John Chesterton, John G. Heald, John P. Wilson, John R. Foster, Charlie Shaw, and David E. Rebollo This event is available at DigitalCommons@USU: https://digitalcommons.usu.edu/ishs/2018/session2-2018/2 7th International Symposium on Hydraulic Structures Aachen, Germany, 15-18 May 2018 ISBN: 978-0-692-13277-7 DOI: 10.15142/T3N64T A Deterministic Method for Evaluating Block Stability on Masonry Spillways O.J. Chesterton1, J.G. Heald1, J.P. Wilson2, J.R. Foster2, C. Shaw2 & D.E Rebollo2 1Mott MacDonald, Cambridge, United Kingdom 2Mott MacDonald Bentley, Leeds, United Kingdom E-mail: [email protected] Abstract: Many early spillways and weirs in the United Kingdom were constructed or faced with masonry.
    [Show full text]
  • Green Routes - November 2015 Finkle Street Old Denaby Bromley Hoober Bank
    Langsett Reservoir Newhill Bow Broom Hingcliff Hill Pilley Green Tankersley Elsecar Roman Terrace Upper Midhope Upper Tankersley SWINTON Underbank Reservoir Midhopestones Green Moor Wortley Lea Brook Swinton Bridge Midhope Reservoir Hunshelf Bank Smithy Moor Green Routes - November 2015 Finkle Street Old Denaby Bromley Hoober Bank Gosling Spring Street Horner House Low Harley Barrow Midhope Moors Piccadilly Barnside Moor Wood Willows Howbrook Harley Knoll Top Cortworth Fenny Common Ings Stocksbridge Hoober Kilnhurst Thorncliffe Park Sugden Clough Spink Hall Wood Royd Wentworth Warren Hood Hill High Green Bracken Moor Howbrook Reservoir Potter Hill East Whitwell Carr Head Whitwell Moor Hollin Busk Sandhill Royd Hooton Roberts Nether Haugh ¯ River Don Calf Carr Allman Well Hill Lane End Bolsterstone Ryecroft Charltonbrook Hesley Wood Dog Kennel Pond Bitholmes Wood B Ewden Village Morley Pond Burncross CHAPELTOWN White Carr la Broomhead Reservoir More Hall Reservoir U c Thorpe Hesley Wharncliffe Chase k p Thrybergh Wigtwizzle b Scholes p Thorpe Common Greasbrough Oaken Clough Wood Seats u e Wingfield Smithy Wood r Brighthorlmlee Wharncliffe Side n Greno Wood Whitley Keppel's Column Parkgate Aldwarke Grenoside V D Redmires Wood a Kimberworth Park Smallfield l o The Wheel l Dropping Well Northfield Dalton Foldrings e n Ecclesfield y Grange Lane Dalton Parva Oughtibridge St Ann's Eastwood Ockley Bottom Oughtibridg e Kimberworth Onesacr e Thorn Hill East Dene Agden Dalton Magna Coldwell Masbrough V Bradgate East Herringthorpe Nether Hey Shiregreen
    [Show full text]
  • Daily Hansard (Parliamentary Debates)
    HANSARDYOUR VOICE IN PARLIAMENT DAILY HANSARD (PARLIAMENTARY DEBATES) TTHEHE SECONDFIRST MEE MEETINGTING O FOF THE THE SECOND SECOND SESSIO SESSIONN OOFF THE ELEVENTH PARLIAMENT HANSARD NO. 181182 TUESDAY 1 MARCH 2016 DISCLAIMER Unofficial Hansard This transcript of Parliamentary proceedings is an unofficial version of the Hansard and may contain inaccuracies. It is hereby published for general purposes only. The final edited version of the Hansard will be published when available and can be obtained from the Assistant Clerk (Editorial). NATIONAL ASSEMBLY ENGLISH VERSION THE NATIONAL ASSEMBLY SPEAKER The Hon. Gladys K. T. Kokorwe MP. DEPUTY SPEAKER The Hon. Kagiso P. Molatlhegi, MP Gaborone South Clerk of the National Assembly - Ms B. N. Dithapo Deputy Clerk of the National Assembly - Dr R.D. Dingalo Ag. Learned Parliamentary Counsel - Mr S. Chikanda Assistant Clerk (E) - Mr R. Josiah CABINET His Excellency Lt. Gen. Dr. S. K. I. Khama PH, FOM, - President DCO, DSM, MP. His Honour M. E. K. Masisi, MP. (Moshupa-Manyana) - Vice President Minister of Foreign Affairs and International Hon. Dr. P. Venson-Moitoi, MP. (Serowe South) - Cooperation Minister of Local Government and Rural Hon. S. Tsogwane, MP. (Boteti North) - Development Minister of Infrastructure, Science and Hon. N. E. Molefhi, MP. (Selebi Phikwe East) - Technology Hon. S. Kgathi, MP. (Bobirwa) - Minister of Defence, Justice and Security Minister of Minerals, Energy and Water Hon. O. K. Mokaila, MP. (Specially Elected) - Resources Hon. P. M. Maele, MP. (Lerala - Maunatlala) - Minister of Lands and Housing Hon. E. J. Batshu, MP. (Nkange) - Minister of Labour and Home Affairs Hon. D. K. Makgato, MP. (Sefhare - Ramokgonami) - Minister of Health Hon.
    [Show full text]
  • Availability and Trends of Water Supply Network in Sub-Sahara Botswana Agarwal A.1, Garg D.2, Nkhwanana N .3
    International Journal of Civil, Mechanical and Energy Science (IJCMES) [Vol-3, Issue-2, Mar-Apr, 2017] https://dx.doi.org/10.24001/ijcmes.3.2.4 ISSN: 2455-5304 Availability and trends of water supply Network in sub-Sahara Botswana Agarwal A.1, Garg D.2, Nkhwanana N .3 1Department of Mechanical engineering, University of Botswana, Botswana 2Department of Computer science, University of Botswana, Botswana 3Department of civil engineering, University of Botswana, Botswana Abstract— Water is an essential requirement for south-eastern Botswana. A country with a high reliance individuals and is one of the major keys of any financial on surface water, Gaborone is the same with, as of not improvement of the world social orders and a long ago, the majority of the city's water being manageable utilization of this asset is of most extreme preoccupied from the Gaborone Reservoir [1]. significance. Water shortage can have extraordinary Botswana's climate is semi-arid. Though it is hot and dry effects with respect to the economy, advancement and for much of the year, there is a rainy season, which runs national security of a nation and it is imperative to get a through the summer months. Rainfall tends to be erratic, handle on the reason for the issue keeping in mind the unpredictable and highly regional. Often a heavy end goal to explain it in the most productive way. By downpour may occur in one area while 10 or 15 breaking down information time arrangement for kilometres away there is no rain at all. Showers are often temperature, precipitation and utilization and followed by strong sunshine so that a good deal of the additionally playing out a spatial investigation over the rainfall does not penetrate the ground but is lost to catchment range it was conceivable to distinguish the evaporation and transpiration.
    [Show full text]
  • ROTHER Don Network Catchment Partnership Workshop 18.02.14
    ROTHER Don Network Catchment Partnership Workshop 18.02.14 Water body Water body ID Who What are you What are you What would you doing now? planning to do? like to do ? Redleadmill Brook GB104027057620 Rother from GB104027057630 EA Avenue Reclamation with Redleadmill Brook to NE Derbyshire CC. Spital Brook GB104027057630 Derbyshire DWT would like to get Wildlife Trust involved in the ongoing ecological restoration at Avenue. Spital/Calow/Muster GB104027057640 Brook Hipper from Source to GB104027057660 DCRT DCRT would like to be River Rother involved in discussion options for improving connectivity. Holme Brook/Linacre GB104027057670 DCRT Ensure an adequate Beck compensation flow from Linacre Res. Control diffuse pollution ( mainly urban). Explore weir removal & culverts. Barlow Brook from GB104027057700 Sheffield Promote upland source to River Drone Moors management at Clough Partnership. Woodland. South Yorkshire Forrest GB104027057700 DCRT Investigate opportunities for weir removal at Sheepbridge. Drone/Whitting from GB104027057710 DCRT Concerns about STW inputs source to River and minewater. Address Rother and improve connectivity. The Moss from source GB104027057720 Moss Valley Regular invasive species Contamination issue at Crayfish & mink invasive to River Rother Wildlife group work and walkover former Norton Aerodrome. control. Potential for hydro- surveys. electric power. Increase fish passage. Sediment contamination issues with weir removal. Influence Natural England to support woodland planting on adjacent farmland. GB104027057720 DCRT Improve connectivity (weir removal) work with Moos Valley Group. Address silt intrusion from a variety of sources. Pigeon Bridge Brook GB104027057730 RMBC Pithouse West potential M1 run off – needs Leachate problems from from source to River leisure development. highways involvement. poor land restoration.
    [Show full text]
  • 629 Bus Time Schedule & Line Route
    629 bus time schedule & line map 629 Aughton <-> Waverley View In Website Mode The 629 bus line (Aughton <-> Waverley) has 2 routes. For regular weekdays, their operation hours are: (1) Aughton <-> Waverley: 2:54 PM (2) Waverley <-> Aughton: 7:56 AM Use the Moovit App to ƒnd the closest 629 bus station near you and ƒnd out when is the next 629 bus arriving. Direction: Aughton <-> Waverley 629 bus Time Schedule 18 stops Aughton <-> Waverley Route Timetable: VIEW LINE SCHEDULE Sunday Not Operational Monday 2:54 PM Aughton Road/Aston Academy, Aughton Tuesday 2:54 PM Aughton Road/Aughton Avenue, Aughton Wednesday 2:54 PM Aughton Road/Westƒeld Avenue, Aughton Thursday 2:54 PM Main Street/Coral Drive, Aughton Friday 2:54 PM Wood Lane/Treeton Lane, Treeton Saturday Not Operational Treeton Lane, Treeton Civil Parish Wood Lane/Bradshaw Avenue, Treeton St. Helens Close, Treeton Civil Parish 629 bus Info High Hazel Road/Falconer Way, Treeton Direction: Aughton <-> Waverley High Hazel Road, Treeton Civil Parish Stops: 18 Trip Duration: 25 min High Hazel Road/Lyminton Lane, Treeton Line Summary: Aughton Road/Aston Academy, Cannonthorpe Rise, Treeton Civil Parish Aughton, Aughton Road/Aughton Avenue, Aughton, Aughton Road/Westƒeld Avenue, Aughton, Main High Hazel Road/Well Lane, Treeton Street/Coral Drive, Aughton, Wood Lane/Treeton Rodwell Close, Treeton Civil Parish Lane, Treeton, Wood Lane/Bradshaw Avenue, Treeton, High Hazel Road/Falconer Way, Treeton, Station Road/Front Street, Treeton High Hazel Road/Lyminton Lane, Treeton, High Hazel Road/Well
    [Show full text]
  • Major Villages Sanitation Project
    Our Ref: WUC 014 (2021) 18 June 2021 TO: All Tenderers Dear Sir / Madam SUPPLY OF WATER TREATMENT CHEMICALS - TENDER NO WUC 014 (2021) ADDENDUM No. 2 The tenderer must note and consider the amendments and/or additions to the Tender Document issued under the above-mentioned tender constitutes Addendum 2 that should be duly incorporated in the Tender Document. Clarification on the above tender refers: 1. Bidders wishing to tender for Supply of Water Treatment Chemicals under the flocculant category are advised as follows: Question 1 Is it compulsory to submit Jar test results at tender stage? In other would we be disqualified if we do not submit them? Response: Please refer to Item 4.2.2.2 Flocculants in the Tender Document - TENDER NO WUC 014 (2021) “All flocculants must be accompanied by the standard specifications as indicated out below at the time of tendering. At the time of delivery, certificates of analysis, which include both physical and chemical parameters, should accompany the chemicals. The Tenderer shall carry out laboratory jar-tests on all raw water supplies in the presence of the Water Utilities Corporation, or other method deemed necessary by the Corporation to evaluate chemical optimum performance”. The statement above requests compulsory testing by the Tenderer of the flocculant they are tendering to supply and obtain performance results which they will share with the Corporation. Refer to response to 6 a. below for further information on contact people and venues for sample collection. Question 2 We wish to request to visit the various sites for raw water sample collection.
    [Show full text]
  • Management of Water Supply Reservoirs Under Uncertainties in Arid and Urbanized Environments
    Journal of Water Resource and Protection, 2016, 8, 990-1009 http://www.scirp.org/journal/jwarp ISSN Online: 1945-3108 ISSN Print: 1945-3094 Management of Water Supply Reservoirs under Uncertainties in Arid and Urbanized Environments B. F. Alemaw, E. O. Keaitse, T. R. Chaoka Department of Geology, University of Botswana, Gaborone, Botswana How to cite this paper: Alemaw, B.F., Abstract Keaitse, E.O. and Chaoka, T.R. (2016) Ma- nagement of Water Supply Reservoirs under Simulation and evaluation study of the three Water Supply Reservoirs in the Not- Uncertainties in Arid and Urbanized Envi- wane Catchment was undertaken using a hybrid modelling approach linking the re- ronments. Journal of Water Resource and servoir simulation model (HEC-ResSim) model and a reservoir reliability analysis Protection, 8, 990-1009. http://dx.doi.org/10.4236/jwarp.2016.811080 (RRA) model. It was used to understand the management challenges and operation aspects facing the recent failure and declining water supply from three reservoirs in Received: September 9, 2016 Gaborone and the surrounding areas, a typical arid and urbanized environment Accepted: October 23, 2016 where current and future water supply reliability is challenged by both climate and Published: October 26, 2016 anthropologic factors. The model was analysed for a calibration period of ten years Copyright © 2016 by authors and (1993-2002), and verification period of eight years (2003-2010) and then simula- Scientific Research Publishing Inc. tion period of 40 years (2011-2050). The simulation period up to the year 2050 was This work is licensed under the Creative considered to include the year 2035, which is the planning horizon of the National Commons Attribution International License (CC BY 4.0).
    [Show full text]
  • Ulley Reservoir and High Velocity Spillway Flows
    Ulley Reservoir and high velocity spillway flows J L HINKS ,, Halcrow Group Limited PJ MASON, Montgomery Watson Harza JR CLAYDON, Independent Consultant SYNOPSIS. In the small hours of Tuesday 26 June, 2007 Rotherham Metropolitan Borough Council requested the evacuation of areas downstream of Ulley Dam and the closure of the M1 motorway because of fears about the safety of the dam. The danger arose because of the failure of the masonry walls of one of the original spillways at the dam during a flood with a return period of about 200 years. This paper discusses the background to the incident, the problems associated with high velocity flows in masonry spillways, the handling of the emergency and plans for the restoration of the dam. INTRODUCTION Ulley reservoir is located about 5 km to the south-east of the town of Rotherham in Yorkshire. The dam, which is earthfill with a puddle clay core, was completed in 1873 and was originally used for water supply. In 1986 it was sold by the Yorkshire Water Authority to Rotherham Metropolitan Borough Council for £1 plus outstanding debts. Since then it has formed the centrepiece of the Council’s Ulley Country Park. 92.4 mm of rain (measured at the Maltby raingauge) fell on 24 and 25 June, 2007. This caused flooding in the Borough, most notably at Catcliffe, and also led to significant spill from Ulley reservoir. At 19.00 on Monday, 25 June the Manager of the Country Park visited the dam and decided that there was a risk of erosion adjacent to the south bywash channel that might endanger the dam.
    [Show full text]