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Interesting Water Facts There is the same amount of water today as there was 1,000,000 years ago..
World Population and density have increased dramatically. Humans are using and polluting the water available to them. Nature can not keep up with cleaning the water as it has done for millions of years
You can make a difference, now and for the future...
Groundwater Groundwater is the water stored underground in rock fractures and pores. About 30% of Australia's 538 groundwater management units are either close to or overused when compared to their estimated sustainable yield. Up to four million people in Australia depend totally or partially on groundwater for domestic water supply.
Dams and Reservoirs There are 501 large dams in Australia having a capacity of more than 1,000mL. Most of Australia's dams were built between 1970 and 1990. In addition there are estimated to be more then 2 million farm dams in Australia. Dams across Australia exeperience significant loss of capacity through evaporation. One of the major consequences of climate change is an increase in evaporation.
How much water does Australia have? Australia, the driest continent has a limited amount of fresh water. Rainfall is highly variable with large areas have average annual rainfall of less than 300mm. Most rainfall is lost to evaporation and transpiration and only about 1% percolates into aquifers to become ground water. Of the runoff that does happen, about 70% is from rivers in the far north, far from population centres.
Desalination Reverse osmosis is a process in which salty water is forced under high pressure(60 times atmospheric pressure) through a plastic membrane. Microscopic pores allow water moleclues through but hold back most salt molecules. This process isn't reliant on rain however there is significant power cost to drive the water through the membrane and the salt stays in the reject stream and sent back into the sea.
The average Australian Home can save around 300,000 lites per year by recycling Grey Water safely... .
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