The Collaborative International Dictionary
Catchwork
Catchwork \Catch"work`\, n. A work or artificial water-course for throwing water on lands that lie on the slopes of hills; a catchdrain.
Wiktionary
catchwork
n. A simple irrigation system, used on sloping land, in which water from a stream or spring is fed in at the top and allowed to trickle down over a number of artificial terraces.