Tuoshan Weir, Ancient water management structure in Haishu District, China
Tuoshan Weir is a stone structure with iron reinforcements spanning the Yinjiang River, featuring a wide crest for water management. The construction channels water across a large agricultural region while blocking saltwater from entering freshwater sources.
The structure was established during the Tang Dynasty to address flooding and saltwater intrusion into the region. This construction marked a turning point in how communities managed water across the area.
A temple near the structure displays statues honoring the builders and remains a gathering place for local ceremonies and community events.
The site is accessible from nearby paths and offers viewpoints along the structure for observation. Visit during dry weather to get a clear view of the entire construction and its layout.
The center of the structure is significantly thicker and gradually narrows toward the edges, a design that enables it to resist water pressure over centuries. This engineering approach demonstrates how builders adapted principles to extend the lifespan of the entire system.
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