Skip to content

You are using an outdated browser

Internet Explorer is not supported by this site and Microsfot has stopped releasing updates, therefore you may encounter issues whilst visiting this site and we strongly recommend that you upgrade your browser for modern web functionality, a better user experience and improved security.

Upgrade my browser

Peruvian sisters build artificial lagoons high in the Andes

8 min read

Good Stuff
Source: Sebastian Rodriguez/Thomson Reuters Foundation

As climate change shrinks the Andean glaciers and brings water shortages, two Quechua sisters are building traditional ‘sacred’ reservoirs to harvest rain for more than 200,000 people.

As glaciers recede, Peruvian sisters build ‘sacred’ reservoirs like their ancestors

AYACUCHO, Peru (Thomson Reuters Foundation) — About 40 years ago, the snow that once covered the Andes mountains near the Peruvian city of Ayacucho started to disappear. Water became scarce for more than 200,000 people in the south-central region, most of them from the Quechua indigenous community. “We had to ration water. Some years, we had water for only two hours a day,” said Dersi Zevallos, a coordinator with Peru’s water and sanitation regulator, SUNASS — Then, Quechua sisters Magdalena and Marcela Machaca (both agricultural engineers) found a solution by looking to the past. They built reservoirs high in the mountains to harvest and “cultivate” rainwater, the same way their ancestors did.

To help cope with the situation, manmade mountain-top reservoirs - which locals call lagoons - capture and store water during the rainy season from November to February.
“Climate is a living being to us,” Marcela told the Thomson Reuters Foundation. “And lately it’s been acting a little crazy.” To help cope with the situation, manmade mountain-top reservoirs – which locals call lagoons – capture and store water during the rainy season from November to February. Source: Facebook/ABA

Climate change has led to increasingly dry conditions for communities in the Peruvian Andes

In 1984, around 130 cm (50 inches) of rainwater fell in Ayacucho, according to SUNASS. Now the city gets only half that much rain every year.

Glaciers, another source of water for the Quechua, have also been affected by warming temperatures.

Across Peru, glaciers lost nearly 30% of their area between 2000 and 2016, according to a study here published last September in geosciences journal The Cryosphere.

“Climate is a living being to us,” Marcela told the Thomson Reuters Foundation. “And lately it’s been acting a little crazy.”

To help cope with the situation, manmade mountain-top reservoirs – which locals call lagoons – capture and store water during the rainy season from November to February, she explained on a tour of one she and her sister built.

In the dry season, the water filters through the ground to recharge the rivers and aquifers used by local authorities to provide water to residents and farms.

“The lagoons play the role that the frozen mountain-tops used to play,” Marcela said.

The Quechua people consider the reservoirs sacred, she noted, believing they “nurture” water at the start of its life.

“Our communities are the protectors of water and we are proud of that,” she added.

Since then, they have built more than 120, which together provide Ayacucho with more than 130 million cubic meters of water for human and agricultural use.
Quechua sisters Magdalena and Marcela Machaca (both agricultural engineers) built their first reservoir back in 1995. Since then, they have built more than 120, which together provide Ayacucho with more than 130 million cubic meters of water for human and agricultural use. Source: Facebook/ABA

The sisters have built more than 120 reservoirs, providing over 130 million cubic meters of water

The sisters built their first reservoir back in 1995 through their organisation, Asociación Bartolomé Aripaylla (ABA) which uses traditional knowledge to help indigenous communities improve their economic activities. 

Since then, they have built more than 120, which together provide Ayacucho with more than 130 million cubic meters of water for human and agricultural use.

Sally Bunnings, a water management expert at the U.N. Food and Agriculture Organization, said the impact of climate change on mountain glaciers, which are melting as global temperatures rise, poses a threat to high-altitude communities.

They should follow the Quechua example of trying to use water resources as efficiently as possible, she added.

“From an early age they should learn to (recognise) and prevent the effects of abrupt change in temperature and make good use of water,” she said.

‘NURTURING WATER’

Almost a quarter of Peru’s population identifies itself as Quechua, making up the country’s largest ethnic group, according to the latest census in 2017.

Marcela said she and her sister first heard about the ancient spiritual practice of “nurturing water” through their grandfather when they were children in the 1970s.

By that time, it was no longer practised, she added.

Then, just as the snow in Ayacucho’s mountains started to dwindle, conflict came to the area.

Ayacucho became the base for the Maoist rebel group Shining Path, or Sendero Luminoso in Spanish, which launched a bid to overthrow the state in 1980. Some 70,000 people were killed before the conflict ended nearly 20 years later.

“People were just trying to escape with their lives. They disregarded the spiritual practices,” Marcela explained. “People forgot to treat nature like a living being.”

The El Nino weather phenomenon hit Peru in 1992, making water even more scarce. That was when the sisters were motivated to build their first artificial lagoons, said Magdalena.

They choose natural landscapes already shaped like reservoirs, to reduce the amount of digging, she explained.

With agreement from local communities and authorities, they seal any leaks with soil and plant native ferns that keep the soil firm, naturally filter the water and shelter birds.

By the end of the year, 15 million additional cubic meters of water were flowing from the lagoons.
According to SUNASS data, in 2010, the Cachi river basin was estimated to provide around 80 million cubic meters of water before any reservoirs were built in the area. By the end of the year, 15 million additional cubic meters of water were flowing from the lagoons. Source: Facebook/ABA

The reservoirs recharge the aquifers and groundwater used for the city’s water supply

Each reservoir – some up to 600 meters (1,970 feet) in diameter – usually takes just a couple of months to build, Magdalena said, and fills up fast in the rainy season. The sisters create small canals to let water escape and prevent the reservoir overflowing in heavy rains, and those take water to the mountain communities.

At the same time, the reservoirs recharge the aquifers and groundwater used for the city’s water supply.

According to SUNASS data, in 2010, the Cachi river basin was estimated to provide around 80 million cubic meters of water before any reservoirs were built in the area. By the end of the year, 15 million additional cubic meters of water were flowing from the lagoons.

That water was given to farmers who would not otherwise have had enough, Magdalena said.

The pair’s brother, Nemesio, a farmer lower down the mountain, said the area previously had no water in the dry season. “Our cattle had nothing to drink, so they were very thin. We couldn’t extract milk. Now we can,” he said.

The city government can not fund the construction of the reservoirs, which cost about $1 million each, Magdalena noted. That often leaves the Machaca sisters struggling to find money for new projects, which are almost entirely paid for by their association, she added. But the government does give the sisters technical advice to ensure the reservoirs properly charge local water sources.

“If we didn’t have these lagoons now, we could not guarantee water for the whole population. They’re completely vital,” said Zevallos of SUNASS.

“In this region, rains will reduce and temperatures will go up,” he said. “For these communities, there is no option but to adapt. If they don’t, they will be risking their own lives.”
Solano said projects like the artificial lagoons will be crucial in helping rural communities survive climate change. “In this region, rains will reduce and temperatures will go up,” he said. “For these communities, there is no option but to adapt. If they don’t, they will be risking their own lives.” Source: Facebook/ABA

ADAPTING TO DROUGHT

Other parts of Latin America could learn from Ayacucho’s experience with water conservation, said Gustavo Solano, project coordinator at the Association for Investigation and Integral Development, a Peru-based organisation that promotes nature-based solutions to climate change.

With supervision from the Machaca sisters, it has started replicating the reservoirs in Guanacaste, a region in northern Costa Rica that is regularly hit by drought.

So far, five reservoirs have been built in the area’s mountains, which charge three rivers that provide water for farms in the dry plains below, Solano said.

In the year since the project launched, locals identified nearly two dozen dried-out water sources that have been revitalized, he added.

Solano said projects like the artificial lagoons will be crucial in helping rural communities survive climate change.

“In this region, rains will reduce and temperatures will go up,” he said. “For these communities, there is no option but to adapt. If they don’t, they will be risking their own lives.”

Source: Reporting by Sebastian Rodriguez for the Thomson Reuters Foundation, the charitable arm of Thomson Reuters, that covers the lives of people around the world who struggle to live freely or fairly.

With supervision from the Machaca sisters, the Association for Investigation and Integral Development — a Peru-based organisation that promotes nature-based solutions to climate change — has started replicating the reservoirs in Guanacaste, a region in northern Costa Rica that is regularly hit by drought.
Other parts of Latin America could learn from Ayacucho’s experience with water conservation. With supervision from the Machaca sisters, the Association for Investigation and Integral Development — a Peru-based organisation that promotes nature-based solutions to climate change — has started replicating the reservoirs in Guanacaste, a region in northern Costa Rica that is regularly hit by drought. Source: Facebook/ABA
Quechua people consider the reservoirs sacred. Source: Marlon del Aguila Guerrero/CIFOR
Photo by
Magdalena Machaca at a lagoon she built that provides water to more than 200.000 people in Ayacucho, Perú. Photo by Source: Sebastian Rodriguez/Thomson Reuters Foundation
An artificial lagoon built by two sisters in Ayacucho, Perú Source: Sebastian Rodriguez/Thomson Reuters Foundation/gca.org
Source: Facebook/ABA
Glaciers, another source of water for the Quechua, have also been affected by warming temperatures. Source: Facebook/ABA
Source: Facebook/ABA
Source: Facebook/ABA
Across Peru, glaciers lost nearly 30% of their area between 2000 and 2016. Source: Facebook/ABA
Artificial lagoons in the Andes tackle water shortages Two Peruvian sisters are building artificial lagoons thousands of feet above sea level. The agricultural engineers are providing high-altitude communities with water so they can continue to survive. Source: YouTube/Global Center on Adaptation
Make an Impact

10 THINGS WE CAN DO TO HELP SAVE OUR PLANET

One million species are threatened with extinction because of human activities. We are responsible for shrinking habitats, exploitation of natural resources, climate change and pollution. Here’s how you can be proactive in helping to save animals who have as much right to live on this planet as we do.