Swale defined: A water harvesting ditch on contour.
Nicholas Burtner explains in detail, but stays light, on the topic of swales in permaculture. What they are, how to create them, and what they are used for in permaculture and earthworks.
As a bonus, at the end of the video there is a collage of different swales in the major climate regions (dry lands, temperate, and tropics).
