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Date 2007
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Asian experiences
01 October, 2007
A number of new projects are being developed throughout Asia to take advantage of the continents immense hydroelectric potential. IWP&DC talked to Norman Bishop of global engineering and construction firm MWH about the company's experiences of working in the region and asked what he thinks are the key areas for growth in the future

Egyptian wonder - building Naga Hammadi dam
20 September, 2007
Imhotep, master builder to the Pharaohs, had the idea for the first pyramid in Eqypt. Today, a new structure is being built on the Nile of similar dimensions, with 400,000m3 of concrete being used to build the Naga Hammadi dam

Studying sediment at Algeria's dams
19 September, 2007
B Remini and W Hallouche investigate the problem of sedimentation in Algeria's large dams

Designed to save time - Malborghetto hydro plant
18 September, 2007
Despite experiencing a lengthy permission process, construction work on the Malbor-ghetto hydro plant in Italy was completed well within schedule thanks to comprehensive planning and design work, writes Francesco Alessandrini and Claudio Frosio

Can hydro power be sustainable?
17 September, 2007
David Harrison, Jeff Opperman and Brian Richter explore whether hydro power projects are a sustainable form of energy, and report on the pursuit of ecologically sustainable hydro on the Yangtze river

Green light for Omkareshwar
14 September, 2007
Through the intervention of India's Supreme Court at a crucial juncture, one more dam-based hydroelectric project in India - the 520MW Omkareshwar scheme - gets ready for commissioning

Ensuring efficient gate operation
31 August, 2007
The successful operation and maintenance of gates was the subject of a number of informative papers presented during the Waterpower XV conference

Behaviour analysis at El Cajon dam
23 August, 2007
J D Aleman Velasquez and S Villegas Lesso describe the general characteristics of Mexico's El Cajon project and present an analysis of its behaviour during construction and after first filling

Seal of protection - St Petersburg flood barrier
16 August, 2007
A 25km storm flood barrier is being constructed to protect the people and cultural treasures of Russia's city of St Petersburg. Essential parts of this project are 40m-wide, 7m-high seals, which are being used to connect tunnel sections underneath the structure

Experimental investigations at Vatnsfell
14 August, 2007
Hydraulic model studies were conducted to evaluate and optimize the hydraulic behavior of the converging spillway, the bottom spillway and the common stilling basin at Vatnsfell hydro scheme in Iceland, writes James Yang

The cutting edge at India's Parbati project stage III
13 August, 2007
Contractors cutting tunnels through the complex rock of the Himalayan foothills for India's Parbati hydroelectric project Stage III are using rigs and rock drills for drilling and bolting, after conditions in some parts of the site were found to be unsuitable for TBM use

Additional services at Kihansi hydro plant
16 July, 2007
Leonard B Kassana investigates whether a mini-hydro plant could be added to the existing Lower Kihansi hydro power scheme in Tanzania

Lessons learned from Mohale
13 July, 2007
Palmi Johannesson and Sixtus L. Tohlang address the behaviour during and after reservoir filling of the 145m high Mohale CFRD in Lesotho, with emphasis on cracking of the concrete slab

Challenges to turbine development
12 July, 2007
The 14 Francis turbine units installed in the left power house at China's Three Gorges project were all commissioned successfully during the period June 2003 to September 2005, functioning as expected. However, all these turbines have developed a pattern of damage mainly on the guide-vanes which has never before been reported. Here S C Li, S H Liu and Y L Wu provide a brief description of damage observations, together with analysis of possible causes

Rolling out power at Nam Theun 2
06 July, 2007
A fleet of rollers is being used to help construct the 39m high RCC dam and integral spillway which forms part of the Nam Theun 2 hydroelectric project

Mine of information
20 June, 2007
When it comes to inspection of hydroelectric projects, remotely operated vehicles are often required to work in areas with heavily restricted visibility and manoeuvrability. Here we take a look at how an ROV was used during rehabilitation of a mine, and describe how the work undertaken is applicable to hydro schemes

Designing stilling basins
19 June, 2007
Arun Goel presents hydraulic model studies of stilling basins for square shaped outlets

Alternative designs for dam construction
18 June, 2007
Economy and speed of construction are the two main aspects that have led to the rise in popularity of RCC dams throughout the world. Francisco Ortega presents an overview of the main issues in RCC dam design, and describes successful experiences at Pedrógão dam, the first RCC dam built in Portugal

Ultrasound testing in RCC dams
15 June, 2007
This paper presents experience gained with non-destructive ultrasound testing equipment focused on the assessment of the adherence between RCC layers without mortar application. Laboratory and field tests were carried out at Fundao hydroelectric plant in Brazil, considering different time intervals between concrete layers. Applicability of ultrasound as a tool for RCC quality control is also discussed

Intelligent monitoring of dam safety
15 June, 2007
Eliane Alves Portela presents an overview of the use of intelligent systems in the safety control of dams, emphasising the role of information technology to enhance the structures safety assessment and potential for new developments in the future

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