‘塘堰’ (táng yàn) is a compound noun referring to small-scale irrigation structures—specifically, earthen embankments or low dams built across streams or valleys to retain water for agriculture. The first character 塘 (táng) means 'pond' or 'reservoir', while 堰 (yàn) means 'weir' or 'dyke'; together, they denote traditional rural water management systems common in southern and central China, especially in hilly or paddy-farming regions. These structures are typically community-maintained and historically vital for flood control, drought resilience, and rice cultivation.

Unlike large modern reservoirs or hydroelectric dams, 塘堰 are modest, locally constructed features—often made of compacted earth, stone, or bamboo—and integrated into village landscapes. They appear frequently in agricultural policy documents, rural development reports, and environmental studies on traditional ecological knowledge. While less common in urban contexts, the term remains widely understood in farming communities and appears in place names (e.g., ‘Xinglong Tangyan Village’).