Definition:
A drainage system for draining seepy hillsides. Tiles are placed along the hillside to intercept the seep water and prevent it from reaching the bottom land, or an open channel is dug along the hillside to achieve the same effect.
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