‘Crazy plan’ mulled to save Cape Town

Expert floats idea of using iceberg from Antarctica to solve water crisis

CAPE TOWN — It is a plan as crazy as the situation is desperate — towing an iceberg from Antarctica to the coastal South African city to supply fresh water to a city in the grip of drought.

Earlier this year, Cape Town came within weeks of shutting off all its taps and forcing residents to queue for water rations at public standpipes.

The cutoff was narrowly averted as people scrambled to reduce their water usage and fall rains saved the day. But the threat is expected to return to the city again next year and beyond.

“The idea sounds crazy,” admits maverick salvage expert Nick Sloane, the brains behind the tow-an-iceberg scheme. “But if you look at the fine details, it is not so crazy.”

Sloane suggests wrapping the iceberg in a textile insulation skirt to stop it melting and using a supertanker and two tugboats to drag it 2,000 kilometers toward Cape Town using prevailing ocean currents.

The iceberg, carefully selected by drones and radiography scans, would be about one kilometer in length, 500 meters across and up to 250 meters deep, with a flat, tabletop surface.

Melted water could be gathered each day using collection channels and a milling machine to create ice slurry — producing 150 million liters of usable water every day for a year.

Fantasy?

Sloane’s idea might be dismissed as mere fantasy.

But the 56-year-old Zambian-South African has a reputation for taking on the impossible after he refloated the giant cruise ship that capsized in 2012 off the Tuscan island of Giglio, killing 32 people — one of the world’s largest and most complex maritime salvage operations.

“Icebergs are made of the purest freshwater on earth,” the founder of Sloane Marine Ltd said.

“Thousands break off every year. Mother Nature has been teasing mankind with this for a long time, saying ‘this is here’.”

He estimates it would cost $100 million to haul an iceberg on a journey that could take up to three months, and another $50-60 million to harvest the water for one year as it melts.

“In Russia, they have pushed (icebergs) away from oil installations — but small ones, they are about half-a-million tons. (Here) we are talking about 100 million tons,” said Sloane.

To tackle the drought, Cape Town has enacted measures ranging from building seawater desalination plants to issuing strict instructions to only flush toilets when necessary.

But whether the authorities will be persuaded to embrace the iceberg project is unclear.

“At this stage it appears to us that in fact the groundwater or desalination options are cheaper or at least equal cost price,” said Cape Town’s Deputy Mayor, Ian Neilson.

There are also questions on how the water from the iceberg will be channeled into the city’s distribution system.

Another problem is that there is no guarantee that by the time the iceberg is hauled to Cape Town, it will still be able to produce the promised volumes of water.

Some, however, were more blunt in their assessment of the plan.

“The project is crazy — no question,” said Olav Orheim, a Norwegian glaciologist with four decades of experience who is working on a similar project for Saudi Arabia.

The idea sounds crazy. But if you look at the fine details, it is not so crazy.” Nick Sloane, salvage expert and founder of Sloane Marine Ltd