Investigating Techniques to Reduce Evaporation from Small Reservoirs in Australia

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Helfer, F
Lemckert, C
Zhang, H
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Valentine, E.M.

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2011
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Brisbane, Australia

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Climate change has been posing a great pressure on water resources, particularly in Australia. In South-East Queensland (SEQ), the annual evaporation is expected to rise by about 16 per cent in the next 60 years due to increasing greenhouse gas emissions. As the region relies on a large volume of stored water, the minimisation of evaporation is a key factor in guaranteeing availability of water in the future. This paper analyses the efficiency of some existing techniques in reducing evaporation from small dams within SEQ. The use of suspended covers, destratification systems and windbreaks was investigated using modelling. Of these techniques, suspended covers showed the greatest potential for reducing evaporation (in the order of 88 per cent). The efficiency of windbreaks was around 27 per cent, while the use of destratification system did not change evaporation rates. These results are encouraging, and further research is warranted to determine the cost-effectiveness and environmental impacts of the use of suspended covers and windbreaks to reduce evaporation from small dams.

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34th IAHR Congress 2011 - Balance and Uncertainty: Water in a Changing World, Incorporating the 33rd Hydrology and Water Resources Symposium and the 10th Conference on Hydraulics in Water Engineering

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Self-archiving of the author-manuscript version is not yet supported by this conference Please refer to the conference link for access to the definitive, published version or contact the authors for more information

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Water resources engineering

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