堰

Multi tool use
攔河堰,是一種橫越河川的障礙設施,可以改變水流的特性。一般而言,堰的尺寸比水壩小,水會在障礙物的後面累積成水潭,積滿後會越過頂部流往下游。堰經常用來引水進入灌溉圳道、防範洪水、量測流量及增加水深以利於通航。
種類
- 固定堰:障礙設施固定的堰。古代多用石塊堆積而成,近代則多使用鋼筋混凝土結構。
- 可動堰:障礙設施高度可調整的堰。
參考文獻
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