Geographical Processes Relevant to Water Management

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Presentation transcript:

Geographical Processes Relevant to Water Management © Karen Devine 2010

The Water Cycle The water cycle is the key geographical mechanism for carrying water through the 4 spheres. The water cycle processes water in the states of liquid, solid and gas. © Karen Devine 2010

The Water Cycle It moves through the processes of: precipitation infiltration percolation run off evaporation condensation. © Karen Devine 2010

The Water Cycle Australia’s water supply can be affected by run-off which includes: sewerage pesticides herbicides fertilisers waste water other chemicals. © Karen Devine 2010

Artesian Basins Artesian basins are also a source of freshwater for a quarter of Australia. Australia’s Great Artesian Basin is the largest artesian basin in the world. © Karen Devine 2010

Artesian Basins Artesian basins form when permeable rock is found between layers of impermeable rock. © Karen Devine 2010

Artesian Basins The porous or permeable rock is capable of holding large amounts of ground water. These rocks are known as aquifers. © Karen Devine 2010

Artesian Basins Bores can be sunk to tap into the water in the aquifers. © Karen Devine 2010

Artesian Basins Yet, many see that this water is inefficiently utilised and much is lost through evaporation and infiltration. © Karen Devine 2010

Question Time? Watch Film on the Great Artesian Basin. Explain how artesian water is being inefficiently used. © Karen Devine 2010