Alien trees threaten biodiversity, increase the risk of wildfires and also guzzle water.
Photo courtesy Cape Winelands Biosphere Reserve
Clearing alien trees from mountain catchments is a more cost-effective approach to providing water than building and maintaining desalination plants.
Alien pine trees, which use substantially more water than the native vegetation of the Cape Mountains, reduce river flows to dams that supply the city’s water.
Martin Kleynhans
March 14, 2022
Petra Brigitte Holden , University of Cape Town ; Alanna Rebelo , Agricultural Research Council ; Joyce Kimutai , University of Cape Town ; Kamoru Abiodun Lawal , University of Cape Town ; Mark New , University of Cape Town ; Piotr Wolski , University of Cape Town ; Romaric C. Odoulami , University of Cape Town , and Tiro Nkemelang , University of Cape Town
Clearing alien trees before the drought hit could have reduced the impact of climate change on water supply during the ‘Day Zero’ drought.
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Academic research can have a direct impact on people's lives. It's crucial to come together to deal with problems like climate change. If we don't, the poor and vulnerable will suffer the most.
Cape Town residents queueing to refill water containers at the Newlands Brewery Spring Water Point in January 2018.
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Artificially dimming the sun, by injecting reflective particles into the upper atmosphere, could reduce the risk of Day Zero level droughts in Cape Town by more than 90% in the future.
Fynbos, the biodiverse shrubland in Cape Town, is thought to have the third highest carbon stored per square metre for any biome in South Africa. It must be protected.
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Cape Town’s new climate strategy is a good start. But it falls short when it comes to nature.
The Cape Town drought was one of the longest and the worst to have affected the city and the region in recent times.
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Regional tourism took a huge knock from the Day Zero experience in Cape Town, South Africa. Here are the lessons learnt.
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Examining old vegetation sediments to learn about shifting weather patterns and climate change.
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The real crisis with water supply is that South Africa doesn’t know what it doesn’t know.
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South Africa’s Department of Water and Sanitation has plans in place to ensure adequate water supply until 2040 and beyond.
Lessons learned from the threat of Cape Town’s “Day Zero.”
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Cities need to pay attention to how extreme weather events effect their resources.
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If the pattern of drought continues in South Africa it’s likely to affect the country’s financial standing too.
What lessons were learnt from Cape Town’s “Day Zero”?
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Cape Town’s draft strategy on water supply is out for comment, but important elements are missing from it.
Cape Town residents queuing for water during the water crisis.
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Water supply systems weren’t designed to deal with altering weather patterns brought about by climate change. This needs to change.
A residential rain garden in Portland’s Tabor to the River project.
City of Portland Government
Faced with a drought, it’s tempting for cities to reduce the amount of space that needs water. But this is not a good idea.
Cape Town narrowly avoided “Day Zero,” but that doesn’t mean the city is resilient to future water shortages.
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Cape Town faced down “Day Zero” earlier this year, but that doesn’t mean its water system is resilient. Other cities should also take note.
Well, well, well.
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Bangalore’s forgotten water wells are being revived, to help the city overcome centuries-old supply issues.
A man gets his drinking water from a Cape Town neighbourhood in 2017.
Rodger Bosch/AFP
In South Africa, Cape Town fears “Day Zero”, when the city will have to ration water drastically. The phenomenon threatens other cities as well but solutions exist.
People in the HaMakuya community go without potable water for months.
Melissa McHale
Small solutions done properly can play a huge role in dealing with water scarcity.
The Berg River Dam on 7 March 2018 about 48% full.
Author supplied
The drought in Cape Town has taught the city some valuable lessons.
Flooding is a common hazard in Nezahualcoyotl, a Mexican city just outside the nation’s capital.
AP Photos/Eduardo Verdugo
In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.