Now, Imperial researchers and their colleagues at the Regional Initiative for Hydrological Monitoring of Andean Ecosystems in South America, have outlined how reviving ancient water systems could help save wet season water for the dry season, where it is desperately needed. To do so, they studied a water system in Huamantanga, Peru – one of the last of its kind. The method could essentially extend the wet season, providing more drinking water and longer crop-growing periods for local farmers. The authors say their research shows how indigenous systems could complement modern engineering solutions for water security in coastal Peru. In doing so, they hope to improve coastal Peru’s water security and resilience to a changing and unpredictable climate.