headwork

the headwork and the irrigation system.The project effectively controls flooding and provides a method of irrigation.

都江堰有效地控制了洪水，也为灌溉提供了便利。

He accomplished this by separating the project in to two main parts: the headwork and the irrigation system.

是迄今世界上唯一留存，年代最久远，且发挥作用的生态型无坝引水工程，景观非常奇特。