Definition:
A sub-system of controlled flood irrigation. Corrugations between crop rows are fed at the head by flows from a furrow long enough to wet laterally the ridges situated between the corrugations. In soils with a large natural slope, corrugations with a small longitudinal slope appear to be parallel to the contours.
Source:
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site
FAO/IPTRID/ICID/ODA, 2000, Irrigation Guidelines, Land and Water Digital Media Series 12, & FAO, 2000, Handbook on Pressurized Irrigation Techniques