Canals built before the Inca Empire may help manage Peru’s water supply. Peru's capital city Lima struggles to supply water to its 12 million residents during the dry months. New study shows how reviving the ancient canals could help save wet season water for the dry season.

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Canals built before the Inca Empire may help manage Peru’s water supply. Peru's capital city Lima struggles to supply water to its 12 million residents during the dry months. New study shows how reviving the ancient canals could help save wet season water for the dry season.