High in the Andean region of Peru, ancient Peruvians stored water in ancient canals dating back to the seventh century. In modern Peru, rural farmers are restoring them – and revitalising their water supplies.
The reason for the canals’ efficiency at filtering water has to do with the make-up of the ground beneath them. Porous, rocky areas act as a sponge, allowing water to resurface within months or even weeks further down the mountain.
A non-governmental agency, CONDESAN, has helped farmers restore one of approximately 10 canals in the region.
Al Jazeera’s Maria Sanchez reports from Huamantanga, Peru.