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Invasive trees targeted by new South Africa anti-drought fund

1 months ago, 16 Nov 18:19

By: Reuters

Big business is backing a fund for South Africa to eradicate invasive trees around Cape Town and yield billions of liters of water as the city emerges from its worst drought in a century, officials said on Friday.

Alien species, such as eucalyptus trees which are largely native to Australia, are thirstier than indigenous vegetation and draw more groundwater through their roots. Preliminary studies estimate 1.8 billion liters of water is lost each year due to alien plants on one aquifer north of Cape Town.

“In order to secure our long-term water supplies, we need to pursue a range of cost effective strategies. One of those is to clear vegetation in our catchments that reduce the runoff into our dams,” Ian Neilson, Cape Town’s deputy mayor, said in a statement.

The group said plans by the city for desalination, recycling waste water and tapping groundwater supplies would cost on average 10 times more to supply each liter of water than clearing invasive eucalyptus, pine and acacia trees.

The Nature Conservancy added that 372 million rand could fund a 30-year program to clear invasive trees and prevent them from returning to seven sub-catchments supplying around three-quarters of Cape Town’s water needs.

“In its first six years, a program of clearing invasive plants could yield 56 billion liters of new supplies,” it said in a statement.


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Invasive trees targeted by new South Africa anti-drought fund

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By: Reuters

Big business is backing a fund for South Africa to eradicate invasive trees around Cape Town and yield billions of liters of water as the city emerges from its worst drought in a century, officials said on Friday.

Alien species, such as eucalyptus trees which are largely native to Australia, are thirstier than indigenous vegetation and draw more groundwater through their roots. Preliminary studies estimate 1.8 billion liters of water is lost each year due to alien plants on one aquifer north of Cape Town.

“In order to secure our long-term water supplies, we need to pursue a range of cost effective strategies. One of those is to clear vegetation in our catchments that reduce the runoff into our dams,” Ian Neilson, Cape Town’s deputy mayor, said in a statement.

The group said plans by the city for desalination, recycling waste water and tapping groundwater supplies would cost on average 10 times more to supply each liter of water than clearing invasive eucalyptus, pine and acacia trees.

The Nature Conservancy added that 372 million rand could fund a 30-year program to clear invasive trees and prevent them from returning to seven sub-catchments supplying around three-quarters of Cape Town’s water needs.

“In its first six years, a program of clearing invasive plants could yield 56 billion liters of new supplies,” it said in a statement.


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