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Ancient Engineering for a Modern Crisis
Indigenous knowledge from 1,400 years ago is helping Peru confront drought. More than 1,400 years ago, Indigenous people in what is now Peru learned how to turn a mountain into a reservoir. High in the Andes, they built channels of stone and earth called amunas. The name comes from a Quechua word meaning to retain.
During the rainy season, the channels divert water from streams and spread it across porous hillsides. The water sinks into the soil and travels through cracks in the rock. The mountain then releases that water weeks or months later through springs and streams. Water that arrived…
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