A Case Study On Merredin Desalination

2911 Words Nov 13th, 2014 12 Pages
A Case Study on Merredin Desalination in Australia
Merredin town, located in Western Australia 's wheat belt, is the subject of detailed groundwater studies. Studies involving groundwater modelling with computers imply that lowering the water table through pumping would effectively control the rising salinity. This salinity could be turned into a resource through desalination to obtain pure water that could be supplied to the town (Australia, 2002).
Scientific modelling shows that, in order to protect the whole town of Merredin, nine bores would have to be dug. Each would produce 50kl/day hence keeping the level of groundwater at a safe depth. This way, the water tables which are currently at 2.5m to 3m beneath would be lowered. As a result, the groundwater levels and salinity would easily be controlled for about 15ha of the central business area of Merredin (Australia, 2002).
Currently, the area uses two installed bores that draw 100kl/day of saline groundwater. This has been able to reduce the water tables up to 50 m away from the bores. The area would also have ponds on two hectares of land, 4km west of the town centre which will dispose off the water produced by the two bores. A desalination plant close to the evaporation ponds is expected to produce clean water from the 10% of the supply to supplement the town supply through the Water Corporation Reservoir. The discharge water will be returned back to the evaporation ponds. The ground water, while being pumped in, would…

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