ANALYSIS: This water crisis won’t be Cape Town’s last

2017-02-18 07:05
Theewaterskloof Dam in June 2016. It has the capacity of almost all the other 13 dams supplying Cape Town’s water combined. (Photo: Masixole Feni, GroundUp)

Theewaterskloof Dam in June 2016. It has the capacity of almost all the other 13 dams supplying Cape Town’s water combined. (Photo: Masixole Feni, GroundUp)

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Cape Town - In February, Cape Town’s dams were at 36% of their total capacity, down by nearly 7% from this time last year. If the water level falls below 20% it can no longer be pumped out.

The city has implemented increasingly stringent restrictions. Residents have been calling into radio stations, sometimes to offer their solutions to dying lawns, sometimes to complain about their non-compliant neighbours. The restrictions have prompted criticism of the city’s statements, including one in which informal settlements were blamed for being major water wasters, GroundUp reported.

The argument about who the largest water consumers are is an important one, but something that seems to be missing is a discussion of long-term strategies for dealing with water shortages. The current drought will certainly not be the city’s last water crisis.

Dr Kevin Winter, of the environmental and geographical sciences department at the University of Cape Town, has posted regularly on his blog about the crisis.

He reminded the public that in April 2005, dams reached an all-time low of 26%. Rain eventually relieved the city. This year there is a lot more uncertainty, and this is due to climate change, Winter says.

“The measurable evidence is that now the rain is falling in a different pattern. It’s falling a lot later in the winter period and sometimes we’re getting thunderstorms as late as November.”

The dry periods are longer. Rainfall is driven more by meteorological events and falls over shorter periods, rather than over the general swathe of the cold front system experienced in the past. This makes rainfall difficult to predict.

Making water management even harder is the spatial expansion of the city and population growth. This meant more piping which meant more leaks.

'Sometimes we need crises like these'

“The city has done fairly well on its leaking programme where estimates are that we lose between 15 and 17%, well below the country’s average of 36%, while there are municipalities that are way over 50%.”

Although Winter commends the city, he says it is possibly too little too late. Winter believes restrictions could have been imposed much earlier and maintained. In 2015, and again in 2016, there was below-average rainfall. It is crucial the rain falls on the watershed where the dams are. At the moment most of the cold fronts are just missing them.

Other options, therefore, need to be explored. The city has plans for using desalination by 2030, but Winter believes there are cheaper and simpler alternatives.

Cape Town obtains roughly 400 million cubic metres of water from its dams. Winter estimates about three times this amount falls onto the city every year as rainfall, and becomes stormwater. Stormwater could be captured and stored in aquifers for use further down the line in an ecologically sensitive way.

Citizens could conserve water with a simple grey water system. Households with swimming pools, which use on average 37% more water, could capture rain in winter to get them through the drier months.

More research, especially on groundwater, is important. Winter is upbeat about the new Future Water Institute at UCT, which will be dedicated to solving the country’s water problems.

“In my opinion, the technical is easy; the socio-political issues of access and justice are the really difficult challenges. So it’s important to get people across these disciplines talking to each other, and talking with respect to each other.”

Winter’s own work focuses on ways to cool shacks and monitor water flow in informal settlements. A lack of decent water and sanitation infrastructure continues to deny dignity to these residents and the water used in these areas is extremely vulnerable to contamination, before running off and contaminating other water sources.

“We need a lot of research and to work harder at shifting research to change policy. It seems sometimes we need crises like these, as they are what we need to spur this on.”

Read more on:    cape town  |  drought  |  water crisis  |  water

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