"The problem is exacerbated in El Alto, a sprawling settlement of over a million people who have migrated from the countryside. ... By 2009, demand for water in El Alto had already outstripped supply ..."
So how do you get a million converging on such a remote area? Same way it's happened all around the world: a poorly conceived development scheme. Water supply planning didn't exist in the minds of these developers, much less how long-running drought and a large population influx would affect the supply.
View of El Alto from Chacaltaya ski resort, which closed in 2009 due to the disappearance of the glacier on its slopes. The shrinking glaciers and snowline that provide up to 28% of water for El Alto pose serious challenges to this city of more than one million people.
Photo: Mari Tortorella
Photo: Ville Miettinen via Wikimedia Commons
By Jan Rocha
November 26, 2016 - 9:07am EST
Reposted with permission from our media associate Climate News Network.
The three main dams that supply La Paz and El Alto are no longer fed by runoff from glaciers and have almost run dry. Water rationing has been introduced in La Paz, and the poor of El Alto—where many are not yet even connected to the mains water supply—have staged protests.Reposted with permission from our media associate Climate News Network.
The armed forces are being brought in to distribute water to the cities, emergency wells are being drilled and schools will have to close two weeks ahead of the summer break
President Evo Morales sacked the head of the water company for not warning him earlier of the dangerous situation, but the changes produced by global warming have been evident for some time.
Shrinking Snowline
A recent report by the Stockholm Environment Institute (SEI) says:
Temperatures in the region have risen by 0.5°C in the period 1976 to 2006, and the people of La Paz and El Alto can observe evidence of climate change in the form of the shrinking snowline in the mountains above them.
"One glacier on Chacaltaya mountain — which rises above El Alto and which once hosted the world's highest ski resort — has already completely disappeared. And the two Tuni-Condoriri glaciers that provide water for El Alto and La Paz lost 39 percent of their area between 1983 and 2006—at a rate of 0.24 sq km per year."The SEI said that if the regional and global climate models that predict a two-degree rise in temperatures by 2050 are right, many small glaciers will completely disappear, while others will shrink dramatically. It warns:
"Glaciers are estimated to provide 20-28 percent of water for El Alto and La Paz. Therefore, glacier loss will have a considerable impact, which will be felt particularly during the dry season, when glacial water provides the majority of urban water.
"The glaciers and mountain water systems also support agriculture, power generation and natural ecosystems throughout the region."The problem is exacerbated in El Alto, a sprawling settlement of over a million people who have migrated from the countryside.
The city's population grew by at least 30 percent between 2001 and 2012, and the city's land area has rapidly expanded by 144 percent in the last decade, spreading into the flat open countryside to the south and west. By 2050, the population is expected to double to two million people.
The SEI believes that one of the causes of this increased influx into the city will be climate change.
It said:
"Evidence from El Alto's history indicates that the fastest periods of population growth coincided with droughts, floods and bad harvests associated with the meteorological phenomena of El Niño and La Niña.
"The years 1985-1987, when migration into El Alto reached heights of 65,000 new immigrants, were also years of poor harvests."Supply Outstripped
By 2009, demand for water in El Alto had already outstripped supply, and that supply is now increasingly under threat as climate change melts the glaciers.
Bolivia cannot rely on new sources to resolve its water crisis, given both the costs and potential range of climate change impacts. So one of the country's most critical challenges in coming years will be to plan and implement strategies for managing water under uncertain climate conditions.
Conservation and recycling methods, the SEI said, will be needed to build the resilience of Bolivian cities' water systems to climate change.
The cities will also need to find ways of reducing water consumption, especially from industries and commercial enterprises, but also from the profligacy of a small number of rich domestic consumers.
The SEI paper recommends community participation in developing strategies and decision-making on the management of water resources. But, at the moment, the only role for those affected communities is that of protest.
[END REPORT]
See also Water rationing introduced as Bolivia drought worsens; November 20, 2016, Al Jazeera
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