Our directory of things of interest

University Directory

Altitude sickness: cleaning up Lake Titicaca

Altitude sickness: cleaning up Lake Titicaca Rafal Cichawa
25 Feb
2017
After decades of neglect, a major clean-up of Lake Titicaca is underway, but will it be sufficient?

Despite the importance it holds to the local people of Puno and the surrounding Katari area for their daily supply of fish and drinking water, Lake Titicaca – at 3,810m, the world’s highest large lake – has been left largely to fend for itself when it comes to hygiene. In October 2016, tens of thousands of critically endangered Titicaca water frogs were found dead, their bodies overwhelmed by toxins in the water. It’s just one result of pollutants that have been flowing in increasing quantities into Cohana Bay, near the tourist spot of Copacabana, for decades.

The key culprit: the 1.2 million residents of El Alto, 60km to the southeast. As the city has rapidly grown (from only 95,000 inhabitants in 1976) so has its waste supply. A recent study led by the French National Institute for Sustainable Development (IRD) identified metals, pharmaceutical residues, nutrients (such as nitrate, phosphate, and ammonium), and faecal bacteria such as E. coli in the city’s wastewater – resulting in suffocating eutrophication, and making the lake unsuitable for consumption, or for the harvesting of fish. ‘The main source of contamination is El Alto, but agriculture, mining, and the increasing population is also contaminating the lake,’ explains Céline Duwig, a soil contaminants specialist at IRD.

The local government has to work on separating industrial wastewater from domestic waste water. That means, obliging industries to treat their waste water, difficult when lots of industries are informal

She points out that vast tin and silver mining has taken place on and off around the lake since the 1940s. To combat the problem, Peruvian President Pedro Pablo Kuczynski announced in January a $437million clean-up operation, including the installation of ten treatment plants on streams flowing into the lake. On a visit to the high altitude basin, he claimed he wanted to ensure, ‘the most beautiful lake in the world is [also] the cleanest lake in the world.’ It follows an agreement struck last year with Bolivian President Evo Morales – Lake Titicaca sits on the border between the two countries – to work together to clean up the lake.

This was published in the March 2017 edition of Geographical magazine.

Related items

NEVER MISS A STORY - Follow Geographical on Social

Want to stay up to date with breaking Geographical stories? Join the thousands following us on Twitter, Facebook and Instagram and stay informed about the world.

More articles in PLACES...

Places

While researching his main article on the world’s smallest countries,…

Places

Vitali Vitaliev briefly meets the down-to-earth ruler of Liectenstein

Places

In the third of his series on geopolitical oddities, Vitali…

Water

Increased rainfall intensity, predicted to occur as the climate changes,…

Deserts

Now in its fourth year, this annual lecture series highlights…

Cities

With Jakarta suffering from severe subsidence, pollution and congestion, Indonesia…

Mapping

A revolution in digital mapmaking is underway and the implications…

Cities

India has pledged $120billion to make its cities ‘smart’. But…

Cities

Buildings made from wood are becoming increasingly common in cities…

Forests

The lead author of a scientific study, which claimed that…

Cities

A team of researchers in Australia are urging urban planners…

Water

An artificial intelligence tool can predict where conflicts related to…

Water

Hundreds of historic landfill sites are at risk from erosion…

Cities

London has officially become the first of a new kind…

Mountains

A new model of the monsoon system, which dispenses with the Himalaya Mountains,…

Places

In the second of his features on the world’s geopolitical…

Water

The discovery a long ‘tongue’ of ice beneath a glacial…

Mapping

Benjamin Hennig explains two cartograms which demonstrate the global water…

Places

Get on your bike with this collection of stories to…