The juxtaposition of an ancient irrigation system with a recently built dam exposes greater dangers and harsher environmental impacts caused by modern systems of controlling water in China's southern Sichuan Province.

Photographer and videographer Sean Gallagher reports for the Pulitzer Center on Crisis Reporting and the Asia Society.

Pulitzer Center: pulitzercenter.org/projects/asia/china’s-disappearing-wetlands

Asia Society: sites.asiasociety.org/chinagreen/threatened-waters/

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