Dams and Reservoirs最新文献

An updated reference table for extreme flood hydrology methods at UK dams 英国大坝特大洪水水文方法最新参考表

Dams and Reservoirs Pub Date : 2024-08-10 DOI: 10.1680/jdare.2024.13

Robert Fraser

引用次数: 0

The delivery of multiple benefits on the Llyn Tegid reservoir safety improvements project 在 Llyn Tegid 水库安全改进项目中实现多重效益

Dams and Reservoirs Pub Date : 2024-07-09 DOI: 10.1680/jdare.2024.12

Andrew Basford

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引用次数: 0

Efficiency of labyrinth vs ogee spillways at high hydraulic heads - case study in Zambia 高水头下迷宫式溢洪道与鹅卵石式溢洪道的效率对比--赞比亚案例研究

Dams and Reservoirs Pub Date : 2024-05-05 DOI: 10.1680/jdare.2024.8

Veronika Martin

{"title":"Efficiency of labyrinth vs ogee spillways at high hydraulic heads - case study in Zambia","authors":"Veronika Martin","doi":"10.1680/jdare.2024.8","DOIUrl":"https://doi.org/10.1680/jdare.2024.8","url":null,"abstract":"A new over-the-dam spillway and 3m dam raising was selected as the preferred option for resolving matters in the interest of safety for an existing dam in Zambia. The cost of supplying concrete at the dam site has the greatest effect on overall project capital costs, and thus optimising the size of the concrete spillway is critical. Both ogee and labyrinth weir designs were developed for a hydraulic head of 5m in the safety check flood. The ogee shape design was developed to achieve high efficiency and required a weir width of 81m. For labyrinth weirs, a limiting factor to the allowable head is the ratio between the water head and weir height above its foundation apron. Using published state-of-the-art research, sixty labyrinth weir configurations were tested, with varying angles, leg lengths, and number of cycles. The optimal of these configurations was chosen as the one with the minimum overall spillway width and volume of concrete. This labyrinth configuration provided a spillway width of 64.45m, and a 22% potential reduction in concrete volume compared to the ogee. The labyrinth design was taken forward for CFD modelling to prove the concept and for further development into a detailed design.","PeriodicalId":505716,"journal":{"name":"Dams and Reservoirs","volume":" 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141129671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Moorland dam - remedial grouting works A Moorland 大坝--补救性灌浆工程

Dams and Reservoirs Pub Date : 2024-04-23 DOI: 10.1680/jdare.24.00011

Tom Rigby

{"title":"A Moorland dam - remedial grouting works","authors":"Tom Rigby","doi":"10.1680/jdare.24.00011","DOIUrl":"https://doi.org/10.1680/jdare.24.00011","url":null,"abstract":"Dam T was constructed around 1880 as a water supply to Greater Manchester and is a Category A impounding reservoir, comprising an earth embankment with a central puddle clay core and storage capacity of approximately 934,000m3. It is one of the earliest dams constructed by Bateman and lies in a cascade of three reservoirs. As part of United Utilities (UU) Portfolio Risk Assessment (PRA) an Internal Erosion Toolbox, flood and slope stability studies were undertaken. These identified that the reservoir's primary failure mechanism was internal erosion through the embankment and presented an unacceptable risk. In order to confirm the conclusions and target a potential solution a Willowstick survey was undertaken which identified two potential seepage flow paths, one flowing into the existing outlet conduit upstream of the core and the other suggesting a compromised central core. This paper summarises the grouting works undertaken to target and remediate the potential core defect in a constrained and environmentally sensitive site. It highlights the benefits of collaborative working, supported by specialist contractors, the Qualified Civil Engineer (QCE) and catchment teams, the use of innovative techniques and lessons learnt from previous projects as well as the challenges presented by the proximity of the public and nesting birds. A total of 322,980 litres of grout was carefully injected into the Tube-a-Manchette (TAM) installations with the works completed in June 2023, two months ahead of programme and significantly below predicted costs, enabling the local walking routes to be reopened prior to the school holidays.","PeriodicalId":505716,"journal":{"name":"Dams and Reservoirs","volume":"135 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140668631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ICOLD 2023, Gothenburg Sweden – Update on Technical Committee C ICOLD 2023，瑞典哥德堡 - C 技术委员会的最新情况

Dams and Reservoirs Pub Date : 2023-09-11 DOI: 10.1680/jdare.23.00300

Viktor Pavlov, Paul Dickens

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ICOLD 2023, Gothenburg Sweden – Report on Workshop 4 ICOLD 2023，瑞典哥德堡 - 第 4 研讨会报告

Dams and Reservoirs Pub Date : 2023-09-11 DOI: 10.1680/jdare.23.00301

Alice Davis

引用次数: 0