11 November 2013 - Aurecon Bulk Water & Dams Leader Peter Blersch will be presenting a paper at a conference which is being run jointly by the New Zealand Society of Large Dams (NZSOLD) and the Australian National Committee on Large Dams (ANCOLD) and will be held in Rotorua, New Zealand, on 13-15 November 2013.
The theme of the conference is on multiple uses of dams and reservoirs in consideration of needs, benefits and risks.
Peter will be presenting a paper on design considerations for the Kashimbila multipurpose dam and hydropower station located in Nigeria on behalf of the authors, Bertrand Rochecouste Collet and Dawid van Wyk.
Bertrand Rochecouste Collet, Technical Director, Aurecon, said that the preliminary design of the dam was initially focussed solely on it functioning as a buffer dam in the case of failure of the natural embankment at Lake Nyos in Cameroon, which could generate an extreme flood endangering the population in south-eastern Nigeria.
“As the design process progressed with a more holistic and multipurpose approach, the capacity of the dam was increased to provide irrigation and potable water to the surrounding towns and villages as well as for the generation of hydropower,” Bertrand said.
Aurecon delivered an economical design to S.C.C. (Nigeria) Limited through modifying the overall dam and spillway design to minimise excavation requirements and changing the initially proposed diversion strategy to a less risky one where the river would only be diverted away from its natural channel for the last wet season, hence a safer and eventually a cheaper alternative for both the permanent and temporary works. Further optimisation of the installed generating capacity was also carried out leading to the current solution.
“We have been working closely with our client on phasing work streams to ensure high levels of efficiency and successful outcomes at every stage of the project lifecycle,” Bertrand said.
Aurecon’s has been assisting S.C.C. (Nigeria) Limited with detailed design, geotechnical investigation, quarterly site visit in ensuring that the construction is in compliance with specifications and drawings, tender process, contract administration and attendance of the Factory Acceptance Tests (FATs) for the mechanical, electro-mechanical and hydro-mechanical equipment.
Construction and commissioning of the dam and hydropower station is expected to be completed by mid 2015.