Salinity in Australia

Salinity In Australia

Salinity in Australia

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Description:
Soil salinity and dryland salinity are two problems degrading the environment of Australia. Salinity is a concern in most states, but especially in the south-west of Western Australia.

The Eastern Mallee and the Western Mallee of Western Australia are areas that are prone to salinity with little remedial action being undertaken to rectify the problem. Lands surrounding Lake Bryde-East Lake Bryde and Dumbleyung Lake have also been affected.

In the Murray River valley irrigation has caused salinity problems. Land surrounding the town of Werrimull in the northwest of Victoria have been affected by salinity due to land clearing.

The problem is a land management issue, similar to severe drought in Australia and to Australia's efforts to control exotic weeds and pests, both threatening yields from agriculture in Australia.

Process

Some of the salts originate from marine sediments, as Australia once contained inner salt seas that over thousands of years, especially during the drying out of Australia, were removed leaving deep traces of salt water in aquifer-like salt water tables underground. However, most of the salt areas have been deposited in rainfall over thousands of years. Where topographic and climatic conditions are right, the salts have accumulated to high levels. Prior to British settlement in 1788, groundwater levels were in equilibrium;...
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